/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 19:03:32,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 19:03:32,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 19:03:32,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 19:03:32,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 19:03:32,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 19:03:32,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 19:03:32,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 19:03:32,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 19:03:32,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 19:03:32,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 19:03:32,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 19:03:32,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 19:03:32,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 19:03:32,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 19:03:32,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 19:03:32,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 19:03:32,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 19:03:32,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 19:03:32,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 19:03:32,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 19:03:32,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 19:03:32,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 19:03:32,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 19:03:32,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 19:03:32,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 19:03:32,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 19:03:32,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 19:03:32,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 19:03:32,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 19:03:32,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 19:03:32,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 19:03:32,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 19:03:32,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 19:03:32,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 19:03:32,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 19:03:32,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 19:03:32,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 19:03:32,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 19:03:32,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 19:03:32,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 19:03:32,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf [2019-12-27 19:03:32,699 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 19:03:32,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 19:03:32,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 19:03:32,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 19:03:32,702 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 19:03:32,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 19:03:32,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 19:03:32,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 19:03:32,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 19:03:32,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 19:03:32,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 19:03:32,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 19:03:32,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 19:03:32,705 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 19:03:32,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 19:03:32,706 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 19:03:32,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 19:03:32,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 19:03:32,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 19:03:32,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 19:03:32,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 19:03:32,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:03:32,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 19:03:32,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 19:03:32,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 19:03:32,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 19:03:32,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 19:03:32,708 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 19:03:32,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 19:03:32,708 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 19:03:32,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 19:03:32,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 19:03:32,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 19:03:32,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 19:03:32,989 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 19:03:32,989 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 19:03:32,990 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2019-12-27 19:03:33,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a058de529/c92d3eccc83447559d606dce940c91f7/FLAG3da350b78 [2019-12-27 19:03:33,677 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 19:03:33,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2019-12-27 19:03:33,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a058de529/c92d3eccc83447559d606dce940c91f7/FLAG3da350b78 [2019-12-27 19:03:33,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a058de529/c92d3eccc83447559d606dce940c91f7 [2019-12-27 19:03:33,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 19:03:33,891 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 19:03:33,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 19:03:33,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 19:03:33,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 19:03:33,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:03:33" (1/1) ... [2019-12-27 19:03:33,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7d11a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:33, skipping insertion in model container [2019-12-27 19:03:33,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:03:33" (1/1) ... [2019-12-27 19:03:33,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 19:03:33,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 19:03:34,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:03:34,601 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 19:03:34,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:03:35,000 INFO L208 MainTranslator]: Completed translation [2019-12-27 19:03:35,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35 WrapperNode [2019-12-27 19:03:35,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 19:03:35,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 19:03:35,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 19:03:35,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 19:03:35,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 19:03:35,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 19:03:35,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 19:03:35,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 19:03:35,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (1/1) ... [2019-12-27 19:03:35,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 19:03:35,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 19:03:35,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 19:03:35,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 19:03:35,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (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 [2019-12-27 19:03:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 19:03:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 19:03:35,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-27 19:03:35,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2019-12-27 19:03:35,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2019-12-27 19:03:35,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 19:03:35,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 19:03:35,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 19:03:35,206 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 19:03:35,694 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 19:03:35,694 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-27 19:03:35,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:03:35 BoogieIcfgContainer [2019-12-27 19:03:35,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 19:03:35,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 19:03:35,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 19:03:35,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 19:03:35,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 07:03:33" (1/3) ... [2019-12-27 19:03:35,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4feda292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:03:35, skipping insertion in model container [2019-12-27 19:03:35,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:03:35" (2/3) ... [2019-12-27 19:03:35,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4feda292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:03:35, skipping insertion in model container [2019-12-27 19:03:35,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:03:35" (3/3) ... [2019-12-27 19:03:35,702 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2019-12-27 19:03:35,710 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 19:03:35,711 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 19:03:35,717 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 19:03:35,718 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 19:03:35,739 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,739 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,740 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,740 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,740 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,740 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,740 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,741 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,743 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,744 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,745 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,745 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,745 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,746 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,746 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,746 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,747 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,747 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,747 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,747 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,747 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,752 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,752 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,752 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,753 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,753 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,753 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,753 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,753 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:03:35,774 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-27 19:03:35,792 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 19:03:35,793 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 19:03:35,793 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 19:03:35,793 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 19:03:35,793 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 19:03:35,793 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 19:03:35,793 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 19:03:35,794 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 19:03:35,808 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions [2019-12-27 19:03:35,810 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions [2019-12-27 19:03:35,868 INFO L132 PetriNetUnfolder]: 7/84 cut-off events. [2019-12-27 19:03:35,868 INFO L133 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2019-12-27 19:03:35,876 INFO L76 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-27 19:03:35,879 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions [2019-12-27 19:03:35,907 INFO L132 PetriNetUnfolder]: 7/84 cut-off events. [2019-12-27 19:03:35,907 INFO L133 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2019-12-27 19:03:35,909 INFO L76 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-27 19:03:35,913 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2019-12-27 19:03:35,916 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 19:03:37,432 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-12-27 19:03:37,708 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-12-27 19:03:38,303 WARN L192 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-12-27 19:03:38,523 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2019-12-27 19:03:38,999 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2019-12-27 19:03:39,401 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-12-27 19:03:40,709 WARN L192 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2019-12-27 19:03:41,185 WARN L192 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-12-27 19:03:41,188 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2019-12-27 19:03:41,189 INFO L214 etLargeBlockEncoding]: Total number of compositions: 77 [2019-12-27 19:03:41,193 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 13 transitions [2019-12-27 19:03:41,200 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2019-12-27 19:03:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-27 19:03:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 19:03:41,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:41,209 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:41,209 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:41,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1101690005, now seen corresponding path program 1 times [2019-12-27 19:03:41,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:41,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385301701] [2019-12-27 19:03:41,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:41,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385301701] [2019-12-27 19:03:41,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:03:41,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:03:41,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [534633396] [2019-12-27 19:03:41,425 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:41,431 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:41,446 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 16 transitions. [2019-12-27 19:03:41,447 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:41,454 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:41,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 19:03:41,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 19:03:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:03:41,470 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-12-27 19:03:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:41,497 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2019-12-27 19:03:41,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:03:41,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-27 19:03:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:41,509 INFO L225 Difference]: With dead ends: 20 [2019-12-27 19:03:41,509 INFO L226 Difference]: Without dead ends: 20 [2019-12-27 19:03:41,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:03:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-27 19:03:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-27 19:03:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-27 19:03:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2019-12-27 19:03:41,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2019-12-27 19:03:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:41,541 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2019-12-27 19:03:41,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 19:03:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2019-12-27 19:03:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:03:41,542 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:41,542 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:41,542 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash -176981712, now seen corresponding path program 1 times [2019-12-27 19:03:41,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:41,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824659275] [2019-12-27 19:03:41,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:41,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824659275] [2019-12-27 19:03:41,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:03:41,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:03:41,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [504996155] [2019-12-27 19:03:41,624 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:41,625 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:41,629 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 19:03:41,629 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:41,647 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:03:41,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:03:41,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:03:41,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:03:41,650 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 5 states. [2019-12-27 19:03:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:41,780 INFO L93 Difference]: Finished difference Result 34 states and 64 transitions. [2019-12-27 19:03:41,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:03:41,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:03:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:41,782 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:03:41,783 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 19:03:41,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:03:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 19:03:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-12-27 19:03:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 19:03:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2019-12-27 19:03:41,790 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 9 [2019-12-27 19:03:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:41,790 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2019-12-27 19:03:41,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:03:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2019-12-27 19:03:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:03:41,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:41,792 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:41,792 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash -737201816, now seen corresponding path program 1 times [2019-12-27 19:03:41,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:41,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127360290] [2019-12-27 19:03:41,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:41,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127360290] [2019-12-27 19:03:41,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083135142] [2019-12-27 19:03:41,925 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:42,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:42,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:03:42,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:42,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2019-12-27 19:03:42,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1641654030] [2019-12-27 19:03:42,048 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:42,050 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:42,054 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 19:03:42,054 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:42,055 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:42,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:03:42,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:03:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:03:42,056 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand 7 states. [2019-12-27 19:03:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:42,161 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2019-12-27 19:03:42,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:03:42,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-27 19:03:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:42,164 INFO L225 Difference]: With dead ends: 85 [2019-12-27 19:03:42,164 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 19:03:42,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:03:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 19:03:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2019-12-27 19:03:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-27 19:03:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 90 transitions. [2019-12-27 19:03:42,173 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 90 transitions. Word has length 12 [2019-12-27 19:03:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:42,174 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 90 transitions. [2019-12-27 19:03:42,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:03:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 90 transitions. [2019-12-27 19:03:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:03:42,175 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:42,175 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:42,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:42,376 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash 888177128, now seen corresponding path program 2 times [2019-12-27 19:03:42,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:42,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627244357] [2019-12-27 19:03:42,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:42,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627244357] [2019-12-27 19:03:42,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697134158] [2019-12-27 19:03:42,494 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:42,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:42,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:42,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:42,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:42,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:42,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:03:42,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [236854164] [2019-12-27 19:03:42,623 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:42,624 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:42,627 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 19:03:42,627 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:42,664 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:03:42,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:42,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:42,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:42,665 INFO L87 Difference]: Start difference. First operand 43 states and 90 transitions. Second operand 9 states. [2019-12-27 19:03:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:42,869 INFO L93 Difference]: Finished difference Result 90 states and 177 transitions. [2019-12-27 19:03:42,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:03:42,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 19:03:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:42,874 INFO L225 Difference]: With dead ends: 90 [2019-12-27 19:03:42,875 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 19:03:42,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:03:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 19:03:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2019-12-27 19:03:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 19:03:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 103 transitions. [2019-12-27 19:03:42,889 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 103 transitions. Word has length 12 [2019-12-27 19:03:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:42,889 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 103 transitions. [2019-12-27 19:03:42,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 103 transitions. [2019-12-27 19:03:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:03:42,892 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:42,892 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:43,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:43,106 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:43,106 INFO L82 PathProgramCache]: Analyzing trace with hash 445777256, now seen corresponding path program 3 times [2019-12-27 19:03:43,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:43,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346304698] [2019-12-27 19:03:43,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:43,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346304698] [2019-12-27 19:03:43,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939095970] [2019-12-27 19:03:43,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:43,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:03:43,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:43,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:43,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:43,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:43,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2019-12-27 19:03:43,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [360629547] [2019-12-27 19:03:43,273 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:43,274 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:43,276 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:03:43,276 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:43,278 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:03:43,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:03:43,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:03:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:03:43,279 INFO L87 Difference]: Start difference. First operand 49 states and 103 transitions. Second operand 7 states. [2019-12-27 19:03:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:43,386 INFO L93 Difference]: Finished difference Result 93 states and 189 transitions. [2019-12-27 19:03:43,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:03:43,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-27 19:03:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:43,388 INFO L225 Difference]: With dead ends: 93 [2019-12-27 19:03:43,388 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 19:03:43,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:03:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 19:03:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 50. [2019-12-27 19:03:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 19:03:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 106 transitions. [2019-12-27 19:03:43,400 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 106 transitions. Word has length 12 [2019-12-27 19:03:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:43,400 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 106 transitions. [2019-12-27 19:03:43,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:03:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 106 transitions. [2019-12-27 19:03:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:03:43,401 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:43,401 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:43,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:43,614 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1348053315, now seen corresponding path program 4 times [2019-12-27 19:03:43,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:43,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834658870] [2019-12-27 19:03:43,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:43,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834658870] [2019-12-27 19:03:43,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930568654] [2019-12-27 19:03:43,719 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:43,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:03:43,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:43,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:43,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:03:43,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:43,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2019-12-27 19:03:43,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [347579728] [2019-12-27 19:03:43,823 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:43,824 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:43,826 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 19:03:43,827 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:43,827 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:43,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:03:43,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:03:43,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:03:43,829 INFO L87 Difference]: Start difference. First operand 50 states and 106 transitions. Second operand 8 states. [2019-12-27 19:03:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:43,972 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2019-12-27 19:03:43,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:03:43,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 19:03:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:43,974 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:03:43,974 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 19:03:43,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:03:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 19:03:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 53. [2019-12-27 19:03:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 19:03:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2019-12-27 19:03:43,982 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 13 [2019-12-27 19:03:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:43,982 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2019-12-27 19:03:43,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:03:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2019-12-27 19:03:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:03:43,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:43,984 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:44,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:44,188 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash 488620291, now seen corresponding path program 5 times [2019-12-27 19:03:44,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:44,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553804284] [2019-12-27 19:03:44,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:44,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553804284] [2019-12-27 19:03:44,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833138871] [2019-12-27 19:03:44,286 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:44,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:03:44,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:44,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:03:44,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:44,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:44,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 19:03:44,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1516954882] [2019-12-27 19:03:44,367 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:44,368 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:44,370 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 19:03:44,371 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:44,411 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:03:44,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:44,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:03:44,413 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand 10 states. [2019-12-27 19:03:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:44,604 INFO L93 Difference]: Finished difference Result 109 states and 227 transitions. [2019-12-27 19:03:44,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:03:44,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 19:03:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:44,606 INFO L225 Difference]: With dead ends: 109 [2019-12-27 19:03:44,606 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 19:03:44,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:03:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 19:03:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 55. [2019-12-27 19:03:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:03:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2019-12-27 19:03:44,613 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2019-12-27 19:03:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:44,614 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2019-12-27 19:03:44,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2019-12-27 19:03:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:03:44,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:44,615 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:44,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:44,816 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash 46220419, now seen corresponding path program 6 times [2019-12-27 19:03:44,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:44,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578442970] [2019-12-27 19:03:44,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:44,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578442970] [2019-12-27 19:03:44,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813953344] [2019-12-27 19:03:44,884 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:44,942 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:03:44,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:44,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:44,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:03:44,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:44,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2019-12-27 19:03:44,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578973016] [2019-12-27 19:03:44,964 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:44,965 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:44,966 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:03:44,967 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:44,968 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:44,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:03:44,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:44,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:03:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:03:44,969 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand 8 states. [2019-12-27 19:03:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:45,084 INFO L93 Difference]: Finished difference Result 110 states and 231 transitions. [2019-12-27 19:03:45,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:03:45,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 19:03:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:45,085 INFO L225 Difference]: With dead ends: 110 [2019-12-27 19:03:45,085 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 19:03:45,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:03:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 19:03:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 55. [2019-12-27 19:03:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:03:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2019-12-27 19:03:45,092 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2019-12-27 19:03:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:45,092 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2019-12-27 19:03:45,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:03:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2019-12-27 19:03:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:03:45,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:45,093 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:45,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:45,297 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash 964559549, now seen corresponding path program 7 times [2019-12-27 19:03:45,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:45,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159839572] [2019-12-27 19:03:45,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:45,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159839572] [2019-12-27 19:03:45,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566015749] [2019-12-27 19:03:45,368 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:45,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:45,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:03:45,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:45,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2019-12-27 19:03:45,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [421430190] [2019-12-27 19:03:45,484 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:45,485 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:45,486 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:03:45,487 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:45,487 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:03:45,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:03:45,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:45,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:03:45,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:03:45,489 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand 8 states. [2019-12-27 19:03:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:45,606 INFO L93 Difference]: Finished difference Result 113 states and 236 transitions. [2019-12-27 19:03:45,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:03:45,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 19:03:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:45,607 INFO L225 Difference]: With dead ends: 113 [2019-12-27 19:03:45,608 INFO L226 Difference]: Without dead ends: 111 [2019-12-27 19:03:45,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:03:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-27 19:03:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2019-12-27 19:03:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:03:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2019-12-27 19:03:45,621 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2019-12-27 19:03:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:45,622 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2019-12-27 19:03:45,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:03:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2019-12-27 19:03:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:45,623 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:45,623 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:45,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:45,824 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1393636837, now seen corresponding path program 8 times [2019-12-27 19:03:45,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:45,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105673450] [2019-12-27 19:03:45,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:45,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105673450] [2019-12-27 19:03:45,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287190701] [2019-12-27 19:03:45,894 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:45,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:45,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:45,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:45,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:03:45,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:45,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 19:03:45,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [99280457] [2019-12-27 19:03:45,995 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:45,996 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:45,998 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:03:45,998 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:45,998 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:45,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:45,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:45,999 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand 9 states. [2019-12-27 19:03:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:46,183 INFO L93 Difference]: Finished difference Result 160 states and 320 transitions. [2019-12-27 19:03:46,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:03:46,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:46,186 INFO L225 Difference]: With dead ends: 160 [2019-12-27 19:03:46,186 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 19:03:46,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:03:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 19:03:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2019-12-27 19:03:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 19:03:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 135 transitions. [2019-12-27 19:03:46,193 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 135 transitions. Word has length 14 [2019-12-27 19:03:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:46,194 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 135 transitions. [2019-12-27 19:03:46,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 135 transitions. [2019-12-27 19:03:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:46,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:46,195 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:46,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:46,399 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 231742107, now seen corresponding path program 9 times [2019-12-27 19:03:46,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:46,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956691781] [2019-12-27 19:03:46,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:46,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956691781] [2019-12-27 19:03:46,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311862588] [2019-12-27 19:03:46,470 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:46,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:03:46,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:46,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:46,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:03:46,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:46,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 19:03:46,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1985771420] [2019-12-27 19:03:46,600 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:46,601 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:46,604 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:03:46,604 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:46,637 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:46,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:03:46,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:03:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:03:46,639 INFO L87 Difference]: Start difference. First operand 62 states and 135 transitions. Second operand 11 states. [2019-12-27 19:03:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:46,907 INFO L93 Difference]: Finished difference Result 145 states and 298 transitions. [2019-12-27 19:03:46,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:03:46,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 19:03:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:46,909 INFO L225 Difference]: With dead ends: 145 [2019-12-27 19:03:46,909 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 19:03:46,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:03:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 19:03:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 66. [2019-12-27 19:03:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 19:03:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 148 transitions. [2019-12-27 19:03:46,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 148 transitions. Word has length 14 [2019-12-27 19:03:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:46,916 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 148 transitions. [2019-12-27 19:03:46,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:03:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 148 transitions. [2019-12-27 19:03:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:46,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:46,918 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:47,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:47,122 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1190386696, now seen corresponding path program 10 times [2019-12-27 19:03:47,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:47,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831436978] [2019-12-27 19:03:47,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:47,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831436978] [2019-12-27 19:03:47,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179589829] [2019-12-27 19:03:47,207 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:47,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:03:47,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:47,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:47,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:03:47,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:47,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 19:03:47,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015813467] [2019-12-27 19:03:47,316 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:47,317 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:47,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:03:47,319 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:47,320 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:47,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:47,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:03:47,323 INFO L87 Difference]: Start difference. First operand 66 states and 148 transitions. Second operand 9 states. [2019-12-27 19:03:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:47,463 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2019-12-27 19:03:47,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:03:47,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:47,464 INFO L225 Difference]: With dead ends: 126 [2019-12-27 19:03:47,465 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:03:47,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:03:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:03:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 67. [2019-12-27 19:03:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 19:03:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2019-12-27 19:03:47,470 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 14 [2019-12-27 19:03:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:47,471 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2019-12-27 19:03:47,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2019-12-27 19:03:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:47,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:47,472 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:47,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:47,679 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash -210657765, now seen corresponding path program 11 times [2019-12-27 19:03:47,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:47,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988623257] [2019-12-27 19:03:47,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:47,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988623257] [2019-12-27 19:03:47,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139747933] [2019-12-27 19:03:47,750 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:47,797 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:47,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:47,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:47,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:47,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:47,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 19:03:47,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [978694827] [2019-12-27 19:03:47,831 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:47,832 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:47,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 19:03:47,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:47,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:47,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:47,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:47,835 INFO L87 Difference]: Start difference. First operand 67 states and 149 transitions. Second operand 9 states. [2019-12-27 19:03:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:48,030 INFO L93 Difference]: Finished difference Result 148 states and 307 transitions. [2019-12-27 19:03:48,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:03:48,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:48,033 INFO L225 Difference]: With dead ends: 148 [2019-12-27 19:03:48,033 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:03:48,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:03:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:03:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 67. [2019-12-27 19:03:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 19:03:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2019-12-27 19:03:48,039 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 14 [2019-12-27 19:03:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:48,040 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2019-12-27 19:03:48,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2019-12-27 19:03:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:48,041 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:48,041 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:48,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:48,245 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1147188453, now seen corresponding path program 12 times [2019-12-27 19:03:48,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:48,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494884698] [2019-12-27 19:03:48,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:48,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494884698] [2019-12-27 19:03:48,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179181049] [2019-12-27 19:03:48,307 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:48,394 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:03:48,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:48,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:48,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:03:48,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:48,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 19:03:48,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [93766851] [2019-12-27 19:03:48,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:48,433 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:48,434 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:03:48,434 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:48,489 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:03:48,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:03:48,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:03:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:03:48,491 INFO L87 Difference]: Start difference. First operand 67 states and 149 transitions. Second operand 13 states. [2019-12-27 19:03:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:48,886 INFO L93 Difference]: Finished difference Result 175 states and 367 transitions. [2019-12-27 19:03:48,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:03:48,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-12-27 19:03:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:48,888 INFO L225 Difference]: With dead ends: 175 [2019-12-27 19:03:48,888 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:03:48,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:03:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:03:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 75. [2019-12-27 19:03:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:03:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 168 transitions. [2019-12-27 19:03:48,894 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 168 transitions. Word has length 14 [2019-12-27 19:03:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:48,894 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 168 transitions. [2019-12-27 19:03:48,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:03:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 168 transitions. [2019-12-27 19:03:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:48,895 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:48,896 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:49,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:49,100 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash 987260232, now seen corresponding path program 13 times [2019-12-27 19:03:49,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:49,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094178204] [2019-12-27 19:03:49,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:49,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094178204] [2019-12-27 19:03:49,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981284943] [2019-12-27 19:03:49,188 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:49,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:03:49,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:49,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:49,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:03:49,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1611551898] [2019-12-27 19:03:49,303 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:49,304 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:49,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:03:49,306 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:49,343 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:03:49,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:03:49,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:03:49,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:03:49,345 INFO L87 Difference]: Start difference. First operand 75 states and 168 transitions. Second operand 11 states. [2019-12-27 19:03:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:49,549 INFO L93 Difference]: Finished difference Result 152 states and 326 transitions. [2019-12-27 19:03:49,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:03:49,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 19:03:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:49,550 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:03:49,550 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:03:49,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:03:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:03:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 77. [2019-12-27 19:03:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 19:03:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 174 transitions. [2019-12-27 19:03:49,556 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 174 transitions. Word has length 14 [2019-12-27 19:03:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:49,556 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 174 transitions. [2019-12-27 19:03:49,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:03:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 174 transitions. [2019-12-27 19:03:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:49,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:49,557 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:49,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:49,760 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 544860360, now seen corresponding path program 14 times [2019-12-27 19:03:49,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:49,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159483887] [2019-12-27 19:03:49,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:49,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159483887] [2019-12-27 19:03:49,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723303025] [2019-12-27 19:03:49,832 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:49,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:49,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:49,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:49,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:03:49,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:49,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 19:03:49,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471022183] [2019-12-27 19:03:49,921 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:49,922 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:49,923 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:03:49,923 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:49,925 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:03:49,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:49,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:03:49,926 INFO L87 Difference]: Start difference. First operand 77 states and 174 transitions. Second operand 9 states. [2019-12-27 19:03:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:50,050 INFO L93 Difference]: Finished difference Result 150 states and 324 transitions. [2019-12-27 19:03:50,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:03:50,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:50,052 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:03:50,052 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:03:50,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:03:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:03:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2019-12-27 19:03:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 19:03:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 174 transitions. [2019-12-27 19:03:50,057 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 174 transitions. Word has length 14 [2019-12-27 19:03:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:50,058 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 174 transitions. [2019-12-27 19:03:50,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 174 transitions. [2019-12-27 19:03:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:50,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:50,059 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:50,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:50,267 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1463199490, now seen corresponding path program 15 times [2019-12-27 19:03:50,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:50,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41594428] [2019-12-27 19:03:50,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:50,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41594428] [2019-12-27 19:03:50,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935438816] [2019-12-27 19:03:50,326 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:50,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:03:50,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:50,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:50,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:03:50,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:50,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 19:03:50,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996297629] [2019-12-27 19:03:50,455 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:50,457 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:50,458 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:03:50,458 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:50,460 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:50,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:50,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:03:50,461 INFO L87 Difference]: Start difference. First operand 77 states and 174 transitions. Second operand 9 states. [2019-12-27 19:03:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:50,584 INFO L93 Difference]: Finished difference Result 147 states and 321 transitions. [2019-12-27 19:03:50,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:03:50,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:50,586 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:03:50,586 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:03:50,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:03:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:03:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2019-12-27 19:03:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:03:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 167 transitions. [2019-12-27 19:03:50,592 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 167 transitions. Word has length 14 [2019-12-27 19:03:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:50,593 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 167 transitions. [2019-12-27 19:03:50,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 167 transitions. [2019-12-27 19:03:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:50,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:50,594 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:50,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:50,798 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1091703141, now seen corresponding path program 16 times [2019-12-27 19:03:50,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:50,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026340035] [2019-12-27 19:03:50,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:50,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026340035] [2019-12-27 19:03:50,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340129379] [2019-12-27 19:03:50,899 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:50,957 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:03:50,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:50,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:50,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:50,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:50,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 19:03:50,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1979865701] [2019-12-27 19:03:50,987 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:50,988 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:50,990 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 19:03:50,990 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:51,058 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:03:51,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:03:51,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:51,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:03:51,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:03:51,059 INFO L87 Difference]: Start difference. First operand 75 states and 167 transitions. Second operand 11 states. [2019-12-27 19:03:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:51,278 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2019-12-27 19:03:51,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:03:51,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 19:03:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:51,281 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:03:51,281 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:03:51,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:03:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:03:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 78. [2019-12-27 19:03:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 19:03:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 178 transitions. [2019-12-27 19:03:51,286 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 178 transitions. Word has length 14 [2019-12-27 19:03:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:51,287 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 178 transitions. [2019-12-27 19:03:51,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:03:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 178 transitions. [2019-12-27 19:03:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:51,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:51,288 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:51,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:51,491 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash -133058552, now seen corresponding path program 17 times [2019-12-27 19:03:51,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:51,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998506739] [2019-12-27 19:03:51,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:51,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998506739] [2019-12-27 19:03:51,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061845668] [2019-12-27 19:03:51,562 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:51,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:03:51,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:51,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:51,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:03:51,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:51,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 19:03:51,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1448217084] [2019-12-27 19:03:51,641 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:51,642 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:51,644 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:03:51,644 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:51,645 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:03:51,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:51,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:51,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:51,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:03:51,645 INFO L87 Difference]: Start difference. First operand 78 states and 178 transitions. Second operand 9 states. [2019-12-27 19:03:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:51,780 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 19:03:51,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:03:51,780 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:51,781 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:03:51,781 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:03:51,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:03:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:03:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 77. [2019-12-27 19:03:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 19:03:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 174 transitions. [2019-12-27 19:03:51,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 174 transitions. Word has length 14 [2019-12-27 19:03:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:51,787 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 174 transitions. [2019-12-27 19:03:51,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 174 transitions. [2019-12-27 19:03:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:03:51,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:51,790 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:51,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:51,998 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1534103013, now seen corresponding path program 18 times [2019-12-27 19:03:51,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:52,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643968951] [2019-12-27 19:03:52,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:52,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643968951] [2019-12-27 19:03:52,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625774045] [2019-12-27 19:03:52,049 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:52,127 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:03:52,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:52,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:52,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:52,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:52,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 19:03:52,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1665503846] [2019-12-27 19:03:52,163 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:52,164 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:52,167 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 19:03:52,167 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:52,169 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:03:52,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:03:52,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:52,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:03:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:52,170 INFO L87 Difference]: Start difference. First operand 77 states and 174 transitions. Second operand 9 states. [2019-12-27 19:03:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:52,328 INFO L93 Difference]: Finished difference Result 166 states and 352 transitions. [2019-12-27 19:03:52,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:03:52,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 19:03:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:52,329 INFO L225 Difference]: With dead ends: 166 [2019-12-27 19:03:52,329 INFO L226 Difference]: Without dead ends: 164 [2019-12-27 19:03:52,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:03:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-27 19:03:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 74. [2019-12-27 19:03:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 19:03:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 165 transitions. [2019-12-27 19:03:52,333 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 165 transitions. Word has length 14 [2019-12-27 19:03:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:52,334 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 165 transitions. [2019-12-27 19:03:52,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:03:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 165 transitions. [2019-12-27 19:03:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:52,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:52,334 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:52,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:52,538 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -222702486, now seen corresponding path program 19 times [2019-12-27 19:03:52,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:52,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476246148] [2019-12-27 19:03:52,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:52,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476246148] [2019-12-27 19:03:52,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458086019] [2019-12-27 19:03:52,631 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:52,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:52,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:03:52,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:52,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 19:03:52,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460115286] [2019-12-27 19:03:52,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:52,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:52,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 19:03:52,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:52,739 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:52,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:52,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:03:52,740 INFO L87 Difference]: Start difference. First operand 74 states and 165 transitions. Second operand 10 states. [2019-12-27 19:03:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:52,967 INFO L93 Difference]: Finished difference Result 191 states and 390 transitions. [2019-12-27 19:03:52,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:03:52,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:52,969 INFO L225 Difference]: With dead ends: 191 [2019-12-27 19:03:52,969 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 19:03:52,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:03:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 19:03:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 76. [2019-12-27 19:03:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:03:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 172 transitions. [2019-12-27 19:03:52,977 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 172 transitions. Word has length 15 [2019-12-27 19:03:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:52,978 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 172 transitions. [2019-12-27 19:03:52,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 172 transitions. [2019-12-27 19:03:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:52,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:52,979 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:53,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:53,183 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1613971120, now seen corresponding path program 20 times [2019-12-27 19:03:53,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:53,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290413232] [2019-12-27 19:03:53,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:53,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290413232] [2019-12-27 19:03:53,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55181540] [2019-12-27 19:03:53,291 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:53,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:53,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:53,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:03:53,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:53,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:53,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 19:03:53,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1117256807] [2019-12-27 19:03:53,486 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:53,492 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:53,494 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 19:03:53,495 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:53,546 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:53,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:03:53,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:03:53,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:03:53,548 INFO L87 Difference]: Start difference. First operand 76 states and 172 transitions. Second operand 12 states. [2019-12-27 19:03:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:53,972 INFO L93 Difference]: Finished difference Result 191 states and 409 transitions. [2019-12-27 19:03:53,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:03:53,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 19:03:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:53,975 INFO L225 Difference]: With dead ends: 191 [2019-12-27 19:03:53,975 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 19:03:53,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:03:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 19:03:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 80. [2019-12-27 19:03:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 19:03:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 187 transitions. [2019-12-27 19:03:53,986 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 187 transitions. Word has length 15 [2019-12-27 19:03:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:53,986 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 187 transitions. [2019-12-27 19:03:53,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:03:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 187 transitions. [2019-12-27 19:03:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:53,987 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:53,988 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:54,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:54,194 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:54,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1722351587, now seen corresponding path program 21 times [2019-12-27 19:03:54,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:54,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4168461] [2019-12-27 19:03:54,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:54,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4168461] [2019-12-27 19:03:54,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421579097] [2019-12-27 19:03:54,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:54,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:03:54,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:54,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:54,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:03:54,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:54,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 19:03:54,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502186542] [2019-12-27 19:03:54,393 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:54,394 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:54,396 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 19:03:54,396 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:54,396 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:54,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:54,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:54,397 INFO L87 Difference]: Start difference. First operand 80 states and 187 transitions. Second operand 10 states. [2019-12-27 19:03:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:54,546 INFO L93 Difference]: Finished difference Result 165 states and 357 transitions. [2019-12-27 19:03:54,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:03:54,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:54,549 INFO L225 Difference]: With dead ends: 165 [2019-12-27 19:03:54,549 INFO L226 Difference]: Without dead ends: 163 [2019-12-27 19:03:54,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:03:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-27 19:03:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 80. [2019-12-27 19:03:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 19:03:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 184 transitions. [2019-12-27 19:03:54,553 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 184 transitions. Word has length 15 [2019-12-27 19:03:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:54,553 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 184 transitions. [2019-12-27 19:03:54,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 184 transitions. [2019-12-27 19:03:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:54,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:54,554 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:54,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:54,758 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1171571248, now seen corresponding path program 22 times [2019-12-27 19:03:54,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:54,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160473963] [2019-12-27 19:03:54,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:54,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160473963] [2019-12-27 19:03:54,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025445530] [2019-12-27 19:03:54,816 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:54,873 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:03:54,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:54,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:54,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:03:54,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:54,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 19:03:54,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [687996439] [2019-12-27 19:03:54,905 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:54,906 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:54,907 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 19:03:54,907 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:54,907 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:54,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:54,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:54,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:03:54,908 INFO L87 Difference]: Start difference. First operand 80 states and 184 transitions. Second operand 10 states. [2019-12-27 19:03:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:55,121 INFO L93 Difference]: Finished difference Result 193 states and 415 transitions. [2019-12-27 19:03:55,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:03:55,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:55,123 INFO L225 Difference]: With dead ends: 193 [2019-12-27 19:03:55,123 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 19:03:55,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:03:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 19:03:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 79. [2019-12-27 19:03:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-27 19:03:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 180 transitions. [2019-12-27 19:03:55,128 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 180 transitions. Word has length 15 [2019-12-27 19:03:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:55,128 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 180 transitions. [2019-12-27 19:03:55,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 180 transitions. [2019-12-27 19:03:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:55,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:55,129 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:55,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:55,333 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2089910378, now seen corresponding path program 23 times [2019-12-27 19:03:55,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:55,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210333299] [2019-12-27 19:03:55,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:55,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210333299] [2019-12-27 19:03:55,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058796636] [2019-12-27 19:03:55,395 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:55,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:55,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:55,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:03:55,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:55,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:55,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 19:03:55,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275871966] [2019-12-27 19:03:55,497 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:55,498 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:55,499 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 19:03:55,499 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:55,500 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:03:55,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:55,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:03:55,501 INFO L87 Difference]: Start difference. First operand 79 states and 180 transitions. Second operand 10 states. [2019-12-27 19:03:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:55,695 INFO L93 Difference]: Finished difference Result 195 states and 415 transitions. [2019-12-27 19:03:55,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:03:55,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:55,696 INFO L225 Difference]: With dead ends: 195 [2019-12-27 19:03:55,697 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 19:03:55,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:03:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 19:03:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 81. [2019-12-27 19:03:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 19:03:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 185 transitions. [2019-12-27 19:03:55,701 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 185 transitions. Word has length 15 [2019-12-27 19:03:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:55,701 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 185 transitions. [2019-12-27 19:03:55,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 185 transitions. [2019-12-27 19:03:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:55,702 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:55,702 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:55,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:55,905 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1425747830, now seen corresponding path program 24 times [2019-12-27 19:03:55,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:55,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255122174] [2019-12-27 19:03:55,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:55,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255122174] [2019-12-27 19:03:55,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113288700] [2019-12-27 19:03:55,971 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:56,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:03:56,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:56,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:03:56,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:03:56,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:56,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 19:03:56,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [559537878] [2019-12-27 19:03:56,084 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:56,084 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:56,086 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 19:03:56,086 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:56,163 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:03:56,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:03:56,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:03:56,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:03:56,164 INFO L87 Difference]: Start difference. First operand 81 states and 185 transitions. Second operand 14 states. [2019-12-27 19:03:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:56,595 INFO L93 Difference]: Finished difference Result 204 states and 442 transitions. [2019-12-27 19:03:56,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:03:56,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-12-27 19:03:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:56,597 INFO L225 Difference]: With dead ends: 204 [2019-12-27 19:03:56,597 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 19:03:56,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:03:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 19:03:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 83. [2019-12-27 19:03:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 19:03:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 192 transitions. [2019-12-27 19:03:56,602 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 192 transitions. Word has length 15 [2019-12-27 19:03:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:56,602 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 192 transitions. [2019-12-27 19:03:56,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:03:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 192 transitions. [2019-12-27 19:03:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:56,603 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:56,603 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:56,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:56,806 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:56,807 INFO L82 PathProgramCache]: Analyzing trace with hash -734770781, now seen corresponding path program 25 times [2019-12-27 19:03:56,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:56,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051493269] [2019-12-27 19:03:56,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:56,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051493269] [2019-12-27 19:03:56,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837014718] [2019-12-27 19:03:56,869 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:56,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:03:56,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:03:57,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:57,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:03:57,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [871317448] [2019-12-27 19:03:57,013 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:57,014 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:57,016 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 19:03:57,016 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:57,068 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:03:57,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:03:57,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:03:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:03:57,069 INFO L87 Difference]: Start difference. First operand 83 states and 192 transitions. Second operand 12 states. [2019-12-27 19:03:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:57,282 INFO L93 Difference]: Finished difference Result 174 states and 383 transitions. [2019-12-27 19:03:57,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:03:57,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 19:03:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:57,285 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:03:57,285 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:03:57,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:03:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:03:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 85. [2019-12-27 19:03:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:03:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 19:03:57,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 19:03:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:57,291 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 19:03:57,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:03:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 19:03:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:57,291 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:57,291 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:57,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:57,495 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:57,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1177170653, now seen corresponding path program 26 times [2019-12-27 19:03:57,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:57,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791376189] [2019-12-27 19:03:57,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:57,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791376189] [2019-12-27 19:03:57,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625031800] [2019-12-27 19:03:57,567 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:57,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:03:57,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:57,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:57,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:03:57,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:57,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 19:03:57,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [781923718] [2019-12-27 19:03:57,652 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:57,653 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:57,654 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 19:03:57,654 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:57,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:03:57,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:57,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:57,657 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 19:03:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:57,785 INFO L93 Difference]: Finished difference Result 175 states and 389 transitions. [2019-12-27 19:03:57,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:03:57,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:57,787 INFO L225 Difference]: With dead ends: 175 [2019-12-27 19:03:57,787 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:03:57,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:03:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:03:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2019-12-27 19:03:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:03:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 19:03:57,791 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 19:03:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:57,791 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 19:03:57,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 19:03:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:57,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:57,792 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:57,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:57,996 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -258831523, now seen corresponding path program 27 times [2019-12-27 19:03:57,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:57,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093612895] [2019-12-27 19:03:57,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:58,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093612895] [2019-12-27 19:03:58,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434939797] [2019-12-27 19:03:58,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:58,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:03:58,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:58,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:03:58,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:58,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:58,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:03:58,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [816323699] [2019-12-27 19:03:58,206 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:58,208 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:58,210 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 19:03:58,210 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:58,212 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:03:58,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:58,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:03:58,213 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 19:03:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:58,387 INFO L93 Difference]: Finished difference Result 175 states and 392 transitions. [2019-12-27 19:03:58,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:03:58,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:58,389 INFO L225 Difference]: With dead ends: 175 [2019-12-27 19:03:58,389 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:03:58,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:03:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:03:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 83. [2019-12-27 19:03:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 19:03:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 191 transitions. [2019-12-27 19:03:58,394 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 191 transitions. Word has length 15 [2019-12-27 19:03:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:58,394 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 191 transitions. [2019-12-27 19:03:58,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 191 transitions. [2019-12-27 19:03:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:58,395 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:58,395 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:58,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:58,599 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:58,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1481233142, now seen corresponding path program 28 times [2019-12-27 19:03:58,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:58,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515039970] [2019-12-27 19:03:58,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:58,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515039970] [2019-12-27 19:03:58,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219645045] [2019-12-27 19:03:58,661 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:58,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:03:58,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:58,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:03:58,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:03:58,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:58,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 19:03:58,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [370464329] [2019-12-27 19:03:58,785 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:58,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:58,788 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 19:03:58,788 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:58,825 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:03:58,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:03:58,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:58,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:03:58,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:03:58,827 INFO L87 Difference]: Start difference. First operand 83 states and 191 transitions. Second operand 12 states. [2019-12-27 19:03:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:59,082 INFO L93 Difference]: Finished difference Result 206 states and 450 transitions. [2019-12-27 19:03:59,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:03:59,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 19:03:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:59,085 INFO L225 Difference]: With dead ends: 206 [2019-12-27 19:03:59,085 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 19:03:59,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:03:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 19:03:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 86. [2019-12-27 19:03:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 19:03:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 202 transitions. [2019-12-27 19:03:59,090 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 202 transitions. Word has length 15 [2019-12-27 19:03:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:59,091 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 202 transitions. [2019-12-27 19:03:59,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:03:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 202 transitions. [2019-12-27 19:03:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:59,091 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:59,091 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:59,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:59,292 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1855089565, now seen corresponding path program 29 times [2019-12-27 19:03:59,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:59,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416567673] [2019-12-27 19:03:59,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:59,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416567673] [2019-12-27 19:03:59,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410920306] [2019-12-27 19:03:59,354 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:59,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:03:59,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:59,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:03:59,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:03:59,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:59,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 19:03:59,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [734488300] [2019-12-27 19:03:59,433 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:59,434 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:59,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 19:03:59,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:59,436 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:59,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:03:59,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:03:59,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:03:59,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:03:59,437 INFO L87 Difference]: Start difference. First operand 86 states and 202 transitions. Second operand 10 states. [2019-12-27 19:03:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:03:59,558 INFO L93 Difference]: Finished difference Result 185 states and 410 transitions. [2019-12-27 19:03:59,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:03:59,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:03:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:03:59,560 INFO L225 Difference]: With dead ends: 185 [2019-12-27 19:03:59,560 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 19:03:59,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:03:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 19:03:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 85. [2019-12-27 19:03:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:03:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 19:03:59,564 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 19:03:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:03:59,564 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 19:03:59,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:03:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 19:03:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:03:59,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:03:59,565 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:03:59,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:59,769 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:03:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:03:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1038833270, now seen corresponding path program 30 times [2019-12-27 19:03:59,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:03:59,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245663152] [2019-12-27 19:03:59,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:03:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:03:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:03:59,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245663152] [2019-12-27 19:03:59,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912397846] [2019-12-27 19:03:59,831 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:03:59,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:03:59,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:03:59,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:03:59,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:03:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:03:59,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:03:59,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 19:03:59,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [506515935] [2019-12-27 19:03:59,994 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:03:59,996 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:03:59,998 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 19:03:59,998 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:03:59,999 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:03:59,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:04:00,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:00,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:04:00,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:00,001 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 19:04:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:00,173 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2019-12-27 19:04:00,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:00,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:04:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:00,175 INFO L225 Difference]: With dead ends: 200 [2019-12-27 19:04:00,175 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 19:04:00,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 19:04:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 83. [2019-12-27 19:04:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 19:04:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 191 transitions. [2019-12-27 19:04:00,181 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 191 transitions. Word has length 15 [2019-12-27 19:04:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:00,181 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 191 transitions. [2019-12-27 19:04:00,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:04:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 191 transitions. [2019-12-27 19:04:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:04:00,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:00,197 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:00,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:00,401 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash -758125904, now seen corresponding path program 31 times [2019-12-27 19:04:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:00,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85538212] [2019-12-27 19:04:00,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:00,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85538212] [2019-12-27 19:04:00,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205833191] [2019-12-27 19:04:00,461 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:00,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:00,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:00,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:00,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 19:04:00,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1539715651] [2019-12-27 19:04:00,554 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:00,557 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:00,558 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 19:04:00,558 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:00,608 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:00,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:00,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:00,609 INFO L87 Difference]: Start difference. First operand 83 states and 191 transitions. Second operand 12 states. [2019-12-27 19:04:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:00,869 INFO L93 Difference]: Finished difference Result 210 states and 460 transitions. [2019-12-27 19:04:00,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:00,869 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 19:04:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:00,871 INFO L225 Difference]: With dead ends: 210 [2019-12-27 19:04:00,871 INFO L226 Difference]: Without dead ends: 208 [2019-12-27 19:04:00,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-27 19:04:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 87. [2019-12-27 19:04:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 19:04:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 206 transitions. [2019-12-27 19:04:00,876 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 206 transitions. Word has length 15 [2019-12-27 19:04:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:00,877 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 206 transitions. [2019-12-27 19:04:00,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 206 transitions. [2019-12-27 19:04:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:04:00,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:00,878 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:01,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:01,081 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 200518685, now seen corresponding path program 32 times [2019-12-27 19:04:01,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:01,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410757597] [2019-12-27 19:04:01,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:01,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410757597] [2019-12-27 19:04:01,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156036130] [2019-12-27 19:04:01,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:01,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:01,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:01,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:01,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:04:01,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:01,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 19:04:01,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2049951122] [2019-12-27 19:04:01,229 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:01,230 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:01,231 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 19:04:01,232 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:01,232 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:01,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:04:01,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:04:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:04:01,233 INFO L87 Difference]: Start difference. First operand 87 states and 206 transitions. Second operand 10 states. [2019-12-27 19:04:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:01,364 INFO L93 Difference]: Finished difference Result 185 states and 410 transitions. [2019-12-27 19:04:01,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:04:01,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:04:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:01,367 INFO L225 Difference]: With dead ends: 185 [2019-12-27 19:04:01,367 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 19:04:01,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:04:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 19:04:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 86. [2019-12-27 19:04:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 19:04:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 202 transitions. [2019-12-27 19:04:01,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 202 transitions. Word has length 15 [2019-12-27 19:04:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:01,372 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 202 transitions. [2019-12-27 19:04:01,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:04:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 202 transitions. [2019-12-27 19:04:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:04:01,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:01,373 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:01,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:01,577 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1200525776, now seen corresponding path program 33 times [2019-12-27 19:04:01,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:01,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252088852] [2019-12-27 19:04:01,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:01,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252088852] [2019-12-27 19:04:01,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10485068] [2019-12-27 19:04:01,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:01,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:01,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:01,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:01,781 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:01,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:01,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 19:04:01,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2144689307] [2019-12-27 19:04:01,825 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:01,827 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:01,830 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 23 transitions. [2019-12-27 19:04:01,830 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:01,831 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:01,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:04:01,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:04:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:04:01,834 INFO L87 Difference]: Start difference. First operand 86 states and 202 transitions. Second operand 10 states. [2019-12-27 19:04:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:02,100 INFO L93 Difference]: Finished difference Result 208 states and 459 transitions. [2019-12-27 19:04:02,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:04:02,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:04:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:02,102 INFO L225 Difference]: With dead ends: 208 [2019-12-27 19:04:02,103 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 19:04:02,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 19:04:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 85. [2019-12-27 19:04:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:04:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 19:04:02,109 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 19:04:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:02,109 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 19:04:02,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:04:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 19:04:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:04:02,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:02,111 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:02,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:02,315 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash -282186646, now seen corresponding path program 34 times [2019-12-27 19:04:02,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:02,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732633713] [2019-12-27 19:04:02,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:02,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732633713] [2019-12-27 19:04:02,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281185690] [2019-12-27 19:04:02,381 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:02,440 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:02,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:02,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:02,442 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:02,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:02,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 19:04:02,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1941211168] [2019-12-27 19:04:02,504 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:02,505 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:02,506 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 19:04:02,506 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:02,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:02,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:04:02,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:04:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:04:02,507 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 19:04:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:02,685 INFO L93 Difference]: Finished difference Result 210 states and 451 transitions. [2019-12-27 19:04:02,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:04:02,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 19:04:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:02,687 INFO L225 Difference]: With dead ends: 210 [2019-12-27 19:04:02,687 INFO L226 Difference]: Without dead ends: 208 [2019-12-27 19:04:02,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-27 19:04:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 81. [2019-12-27 19:04:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 19:04:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 186 transitions. [2019-12-27 19:04:02,691 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 186 transitions. Word has length 15 [2019-12-27 19:04:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:02,691 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 186 transitions. [2019-12-27 19:04:02,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:04:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 186 transitions. [2019-12-27 19:04:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:02,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:02,692 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:02,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:02,896 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash -867499506, now seen corresponding path program 35 times [2019-12-27 19:04:02,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:02,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604125353] [2019-12-27 19:04:02,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:02,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604125353] [2019-12-27 19:04:02,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139028253] [2019-12-27 19:04:02,991 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:03,053 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:04:03,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:03,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:03,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:03,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:03,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:03,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [577964397] [2019-12-27 19:04:03,092 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:03,093 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:03,097 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 19:04:03,097 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:03,098 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:03,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:03,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:03,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:03,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:03,099 INFO L87 Difference]: Start difference. First operand 81 states and 186 transitions. Second operand 11 states. [2019-12-27 19:04:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:03,353 INFO L93 Difference]: Finished difference Result 271 states and 546 transitions. [2019-12-27 19:04:03,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:03,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:03,356 INFO L225 Difference]: With dead ends: 271 [2019-12-27 19:04:03,356 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 19:04:03,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 19:04:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 88. [2019-12-27 19:04:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:04:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2019-12-27 19:04:03,361 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 16 [2019-12-27 19:04:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:03,361 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2019-12-27 19:04:03,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2019-12-27 19:04:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:03,362 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:03,362 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:03,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:03,565 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash 757879438, now seen corresponding path program 36 times [2019-12-27 19:04:03,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:03,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317418019] [2019-12-27 19:04:03,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:03,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317418019] [2019-12-27 19:04:03,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107154944] [2019-12-27 19:04:03,641 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:03,702 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:03,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:03,703 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:03,704 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:03,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:03,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:03,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690605234] [2019-12-27 19:04:03,728 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:03,729 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:03,731 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:03,731 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:03,775 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:03,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:03,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:03,777 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand 13 states. [2019-12-27 19:04:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:04,162 INFO L93 Difference]: Finished difference Result 245 states and 519 transitions. [2019-12-27 19:04:04,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:04:04,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:04,165 INFO L225 Difference]: With dead ends: 245 [2019-12-27 19:04:04,165 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 19:04:04,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:04:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 19:04:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 92. [2019-12-27 19:04:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 19:04:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 214 transitions. [2019-12-27 19:04:04,170 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 214 transitions. Word has length 16 [2019-12-27 19:04:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:04,170 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 214 transitions. [2019-12-27 19:04:04,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 214 transitions. [2019-12-27 19:04:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:04,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:04,171 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:04,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:04,375 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1716524027, now seen corresponding path program 37 times [2019-12-27 19:04:04,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:04,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102304764] [2019-12-27 19:04:04,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:04,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102304764] [2019-12-27 19:04:04,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11926538] [2019-12-27 19:04:04,440 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:04,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:04,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:04:04,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:04,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:04,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [868566954] [2019-12-27 19:04:04,541 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:04,542 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:04,544 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 19:04:04,544 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:04,560 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:04,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:04,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:04,561 INFO L87 Difference]: Start difference. First operand 92 states and 214 transitions. Second operand 11 states. [2019-12-27 19:04:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:04,802 INFO L93 Difference]: Finished difference Result 219 states and 471 transitions. [2019-12-27 19:04:04,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:04,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:04,804 INFO L225 Difference]: With dead ends: 219 [2019-12-27 19:04:04,805 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 19:04:04,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 19:04:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 91. [2019-12-27 19:04:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-27 19:04:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 210 transitions. [2019-12-27 19:04:04,808 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 210 transitions. Word has length 16 [2019-12-27 19:04:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:04,809 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 210 transitions. [2019-12-27 19:04:04,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 210 transitions. [2019-12-27 19:04:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:04,809 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:04,809 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:05,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:05,013 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 315479566, now seen corresponding path program 38 times [2019-12-27 19:04:05,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:05,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569396812] [2019-12-27 19:04:05,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:05,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569396812] [2019-12-27 19:04:05,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094261452] [2019-12-27 19:04:05,092 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:05,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:05,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:05,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:05,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:05,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:05,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2019-12-27 19:04:05,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1958326162] [2019-12-27 19:04:05,204 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:05,205 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:05,207 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 19:04:05,207 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:05,207 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:05,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:05,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:05,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:05,208 INFO L87 Difference]: Start difference. First operand 91 states and 210 transitions. Second operand 11 states. [2019-12-27 19:04:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:05,485 INFO L93 Difference]: Finished difference Result 235 states and 504 transitions. [2019-12-27 19:04:05,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:05,486 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:05,487 INFO L225 Difference]: With dead ends: 235 [2019-12-27 19:04:05,488 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 19:04:05,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 19:04:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2019-12-27 19:04:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 19:04:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 194 transitions. [2019-12-27 19:04:05,493 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 194 transitions. Word has length 16 [2019-12-27 19:04:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:05,493 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 194 transitions. [2019-12-27 19:04:05,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 194 transitions. [2019-12-27 19:04:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:05,494 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:05,494 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:05,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:05,697 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash -621051122, now seen corresponding path program 39 times [2019-12-27 19:04:05,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:05,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105103243] [2019-12-27 19:04:05,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:05,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105103243] [2019-12-27 19:04:05,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512800028] [2019-12-27 19:04:05,769 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:05,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:04:05,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:05,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:05,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:05,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:05,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:05,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957817582] [2019-12-27 19:04:05,888 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:05,889 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:05,890 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:05,890 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:05,947 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:05,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:04:05,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:04:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:05,948 INFO L87 Difference]: Start difference. First operand 86 states and 194 transitions. Second operand 15 states. [2019-12-27 19:04:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:06,397 INFO L93 Difference]: Finished difference Result 248 states and 532 transitions. [2019-12-27 19:04:06,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:04:06,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-27 19:04:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:06,400 INFO L225 Difference]: With dead ends: 248 [2019-12-27 19:04:06,400 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 19:04:06,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=1026, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:04:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 19:04:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 94. [2019-12-27 19:04:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-27 19:04:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 219 transitions. [2019-12-27 19:04:06,405 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 219 transitions. Word has length 16 [2019-12-27 19:04:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:06,405 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 219 transitions. [2019-12-27 19:04:06,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:04:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 219 transitions. [2019-12-27 19:04:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:06,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:06,406 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:06,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:06,610 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1513397563, now seen corresponding path program 40 times [2019-12-27 19:04:06,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:06,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685339940] [2019-12-27 19:04:06,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:06,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685339940] [2019-12-27 19:04:06,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811531369] [2019-12-27 19:04:06,681 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:06,749 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:06,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:06,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:06,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:04:06,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:06,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:06,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [618525599] [2019-12-27 19:04:06,774 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:06,775 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:06,777 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:06,777 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:06,800 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:06,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:06,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:06,801 INFO L87 Difference]: Start difference. First operand 94 states and 219 transitions. Second operand 13 states. [2019-12-27 19:04:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:07,124 INFO L93 Difference]: Finished difference Result 220 states and 478 transitions. [2019-12-27 19:04:07,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:04:07,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:07,127 INFO L225 Difference]: With dead ends: 220 [2019-12-27 19:04:07,127 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 19:04:07,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:04:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 19:04:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 95. [2019-12-27 19:04:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 19:04:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 223 transitions. [2019-12-27 19:04:07,139 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 223 transitions. Word has length 16 [2019-12-27 19:04:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:07,139 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 223 transitions. [2019-12-27 19:04:07,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 223 transitions. [2019-12-27 19:04:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:07,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:07,140 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:07,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:07,343 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:07,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1822925144, now seen corresponding path program 41 times [2019-12-27 19:04:07,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:07,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895822899] [2019-12-27 19:04:07,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:07,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895822899] [2019-12-27 19:04:07,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365910149] [2019-12-27 19:04:07,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:07,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:07,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:07,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:04:07,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:07,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:07,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 19:04:07,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1276270145] [2019-12-27 19:04:07,521 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:07,521 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:07,523 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 19:04:07,524 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:07,524 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:07,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:07,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:07,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:07,525 INFO L87 Difference]: Start difference. First operand 95 states and 223 transitions. Second operand 11 states. [2019-12-27 19:04:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:07,713 INFO L93 Difference]: Finished difference Result 192 states and 423 transitions. [2019-12-27 19:04:07,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:07,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:07,715 INFO L225 Difference]: With dead ends: 192 [2019-12-27 19:04:07,715 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 19:04:07,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 19:04:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 96. [2019-12-27 19:04:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 19:04:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 224 transitions. [2019-12-27 19:04:07,719 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 224 transitions. Word has length 16 [2019-12-27 19:04:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:07,719 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 224 transitions. [2019-12-27 19:04:07,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 224 transitions. [2019-12-27 19:04:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:07,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:07,720 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:07,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:07,923 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997691, now seen corresponding path program 42 times [2019-12-27 19:04:07,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:07,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170982591] [2019-12-27 19:04:07,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:07,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170982591] [2019-12-27 19:04:07,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865838354] [2019-12-27 19:04:07,993 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:08,066 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:08,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:08,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:08,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:08,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:08,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:08,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1055438320] [2019-12-27 19:04:08,093 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:08,094 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:08,096 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 19:04:08,096 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:08,096 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:08,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:08,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:08,098 INFO L87 Difference]: Start difference. First operand 96 states and 224 transitions. Second operand 11 states. [2019-12-27 19:04:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:08,351 INFO L93 Difference]: Finished difference Result 223 states and 487 transitions. [2019-12-27 19:04:08,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:08,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:08,353 INFO L225 Difference]: With dead ends: 223 [2019-12-27 19:04:08,353 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 19:04:08,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 19:04:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 95. [2019-12-27 19:04:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 19:04:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 220 transitions. [2019-12-27 19:04:08,358 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 220 transitions. Word has length 16 [2019-12-27 19:04:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:08,358 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 220 transitions. [2019-12-27 19:04:08,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 220 transitions. [2019-12-27 19:04:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:08,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:08,360 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:08,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:08,564 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1989336821, now seen corresponding path program 43 times [2019-12-27 19:04:08,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:08,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615636817] [2019-12-27 19:04:08,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:08,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615636817] [2019-12-27 19:04:08,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144522467] [2019-12-27 19:04:08,630 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:08,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:08,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:08,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:08,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:08,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1885915178] [2019-12-27 19:04:08,741 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:08,746 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:08,747 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:08,748 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:08,748 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:08,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:08,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:08,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:08,749 INFO L87 Difference]: Start difference. First operand 95 states and 220 transitions. Second operand 11 states. [2019-12-27 19:04:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:09,004 INFO L93 Difference]: Finished difference Result 216 states and 470 transitions. [2019-12-27 19:04:09,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:09,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:09,005 INFO L225 Difference]: With dead ends: 216 [2019-12-27 19:04:09,006 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 19:04:09,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 19:04:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 93. [2019-12-27 19:04:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 19:04:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 213 transitions. [2019-12-27 19:04:09,009 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 213 transitions. Word has length 16 [2019-12-27 19:04:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:09,010 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 213 transitions. [2019-12-27 19:04:09,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 213 transitions. [2019-12-27 19:04:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:09,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:09,010 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:09,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:09,214 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:09,215 INFO L82 PathProgramCache]: Analyzing trace with hash -565565810, now seen corresponding path program 44 times [2019-12-27 19:04:09,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:09,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371628372] [2019-12-27 19:04:09,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:09,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371628372] [2019-12-27 19:04:09,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686740577] [2019-12-27 19:04:09,276 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:09,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:09,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:09,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:09,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:09,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:09,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:09,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2124088249] [2019-12-27 19:04:09,367 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:09,368 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:09,369 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:09,369 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:09,394 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:09,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:09,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:09,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:09,395 INFO L87 Difference]: Start difference. First operand 93 states and 213 transitions. Second operand 13 states. [2019-12-27 19:04:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:09,767 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2019-12-27 19:04:09,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:04:09,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:09,770 INFO L225 Difference]: With dead ends: 240 [2019-12-27 19:04:09,770 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 19:04:09,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:04:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 19:04:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 96. [2019-12-27 19:04:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 19:04:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 224 transitions. [2019-12-27 19:04:09,775 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 224 transitions. Word has length 16 [2019-12-27 19:04:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:09,775 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 224 transitions. [2019-12-27 19:04:09,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 224 transitions. [2019-12-27 19:04:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:09,775 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:09,776 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:09,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:09,976 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash 393078779, now seen corresponding path program 45 times [2019-12-27 19:04:09,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:09,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632194476] [2019-12-27 19:04:09,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:10,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632194476] [2019-12-27 19:04:10,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101606334] [2019-12-27 19:04:10,034 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:10,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:10,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:10,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:10,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:10,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:10,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:10,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1718370829] [2019-12-27 19:04:10,119 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:10,120 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:10,121 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 19:04:10,121 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:10,121 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:10,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:10,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:10,122 INFO L87 Difference]: Start difference. First operand 96 states and 224 transitions. Second operand 11 states. [2019-12-27 19:04:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:10,375 INFO L93 Difference]: Finished difference Result 225 states and 485 transitions. [2019-12-27 19:04:10,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:10,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:10,378 INFO L225 Difference]: With dead ends: 225 [2019-12-27 19:04:10,378 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 19:04:10,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 19:04:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 95. [2019-12-27 19:04:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 19:04:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 220 transitions. [2019-12-27 19:04:10,381 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 220 transitions. Word has length 16 [2019-12-27 19:04:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:10,382 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 220 transitions. [2019-12-27 19:04:10,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 220 transitions. [2019-12-27 19:04:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:10,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:10,382 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:10,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:10,583 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1007965682, now seen corresponding path program 46 times [2019-12-27 19:04:10,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:10,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251407510] [2019-12-27 19:04:10,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:10,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251407510] [2019-12-27 19:04:10,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014029848] [2019-12-27 19:04:10,668 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:10,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:10,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:10,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:10,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:10,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:10,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2019-12-27 19:04:10,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1002583710] [2019-12-27 19:04:10,829 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:10,831 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:10,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 19:04:10,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:10,835 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:10,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:10,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:10,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:10,836 INFO L87 Difference]: Start difference. First operand 95 states and 220 transitions. Second operand 11 states. [2019-12-27 19:04:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:11,167 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2019-12-27 19:04:11,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:04:11,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:11,169 INFO L225 Difference]: With dead ends: 234 [2019-12-27 19:04:11,169 INFO L226 Difference]: Without dead ends: 232 [2019-12-27 19:04:11,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-27 19:04:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 91. [2019-12-27 19:04:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-27 19:04:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 208 transitions. [2019-12-27 19:04:11,175 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 208 transitions. Word has length 16 [2019-12-27 19:04:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:11,176 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 208 transitions. [2019-12-27 19:04:11,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 208 transitions. [2019-12-27 19:04:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:11,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:11,177 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:11,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:11,381 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:11,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:11,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1371575182, now seen corresponding path program 47 times [2019-12-27 19:04:11,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:11,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596858905] [2019-12-27 19:04:11,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:11,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596858905] [2019-12-27 19:04:11,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332603261] [2019-12-27 19:04:11,502 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:11,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:11,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:11,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:11,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:04:11,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:11,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:11,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410105288] [2019-12-27 19:04:11,586 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:11,587 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:11,588 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 19:04:11,588 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:11,680 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:04:11,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:04:11,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:04:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:11,682 INFO L87 Difference]: Start difference. First operand 91 states and 208 transitions. Second operand 17 states. [2019-12-27 19:04:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:12,344 INFO L93 Difference]: Finished difference Result 298 states and 636 transitions. [2019-12-27 19:04:12,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:04:12,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-12-27 19:04:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:12,347 INFO L225 Difference]: With dead ends: 298 [2019-12-27 19:04:12,347 INFO L226 Difference]: Without dead ends: 296 [2019-12-27 19:04:12,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=611, Invalid=1459, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:04:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-27 19:04:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 103. [2019-12-27 19:04:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:04:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 239 transitions. [2019-12-27 19:04:12,351 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 239 transitions. Word has length 16 [2019-12-27 19:04:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:12,351 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 239 transitions. [2019-12-27 19:04:12,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:04:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 239 transitions. [2019-12-27 19:04:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:12,352 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:12,352 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:12,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:12,553 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash -417606021, now seen corresponding path program 48 times [2019-12-27 19:04:12,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:12,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905354666] [2019-12-27 19:04:12,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:12,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905354666] [2019-12-27 19:04:12,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548393885] [2019-12-27 19:04:12,624 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:12,688 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:04:12,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:12,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:04:12,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:12,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:12,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 19:04:12,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1403474685] [2019-12-27 19:04:12,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:12,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:12,738 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 19:04:12,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:12,799 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:04:12,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:04:12,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:12,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:04:12,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:12,800 INFO L87 Difference]: Start difference. First operand 103 states and 239 transitions. Second operand 15 states. [2019-12-27 19:04:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:13,201 INFO L93 Difference]: Finished difference Result 265 states and 573 transitions. [2019-12-27 19:04:13,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:04:13,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-27 19:04:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:13,204 INFO L225 Difference]: With dead ends: 265 [2019-12-27 19:04:13,204 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 19:04:13,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=388, Invalid=944, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:04:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 19:04:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 103. [2019-12-27 19:04:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:04:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 239 transitions. [2019-12-27 19:04:13,208 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 239 transitions. Word has length 16 [2019-12-27 19:04:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:13,209 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 239 transitions. [2019-12-27 19:04:13,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:04:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 239 transitions. [2019-12-27 19:04:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:13,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:13,210 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:13,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:13,413 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1716842664, now seen corresponding path program 49 times [2019-12-27 19:04:13,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:13,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234879101] [2019-12-27 19:04:13,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:13,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234879101] [2019-12-27 19:04:13,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093760642] [2019-12-27 19:04:13,481 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:13,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:04:13,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:13,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:13,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 19:04:13,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [154619067] [2019-12-27 19:04:13,639 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:13,640 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:13,641 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 19:04:13,641 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:13,676 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:04:13,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:13,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:13,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:13,677 INFO L87 Difference]: Start difference. First operand 103 states and 239 transitions. Second operand 13 states. [2019-12-27 19:04:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:13,934 INFO L93 Difference]: Finished difference Result 225 states and 496 transitions. [2019-12-27 19:04:13,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:04:13,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:13,936 INFO L225 Difference]: With dead ends: 225 [2019-12-27 19:04:13,936 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 19:04:13,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:04:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 19:04:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2019-12-27 19:04:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 19:04:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 19:04:13,940 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 19:04:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:13,940 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 19:04:13,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 19:04:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:13,941 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:13,941 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:14,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:14,142 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1274442792, now seen corresponding path program 50 times [2019-12-27 19:04:14,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:14,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688670269] [2019-12-27 19:04:14,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:14,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688670269] [2019-12-27 19:04:14,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145946472] [2019-12-27 19:04:14,200 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:14,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:14,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:14,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:14,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:04:14,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:14,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 19:04:14,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [204332568] [2019-12-27 19:04:14,280 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:14,281 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:14,283 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:14,283 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:14,284 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:04:14,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:14,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:14,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:14,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:04:14,285 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 19:04:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:14,439 INFO L93 Difference]: Finished difference Result 228 states and 507 transitions. [2019-12-27 19:04:14,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:14,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:14,440 INFO L225 Difference]: With dead ends: 228 [2019-12-27 19:04:14,440 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 19:04:14,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:04:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 19:04:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 105. [2019-12-27 19:04:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 19:04:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 19:04:14,444 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 19:04:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:14,444 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 19:04:14,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 19:04:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:14,445 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:14,445 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:14,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:14,648 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2102185374, now seen corresponding path program 51 times [2019-12-27 19:04:14,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:14,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743306270] [2019-12-27 19:04:14,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:14,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743306270] [2019-12-27 19:04:14,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105543065] [2019-12-27 19:04:14,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:14,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:04:14,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:14,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:04:14,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:14,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:14,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 19:04:14,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1503268487] [2019-12-27 19:04:14,876 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:14,878 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:14,879 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:14,880 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:14,882 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:14,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:14,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:14,883 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 19:04:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:15,041 INFO L93 Difference]: Finished difference Result 234 states and 525 transitions. [2019-12-27 19:04:15,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:15,042 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:15,043 INFO L225 Difference]: With dead ends: 234 [2019-12-27 19:04:15,043 INFO L226 Difference]: Without dead ends: 232 [2019-12-27 19:04:15,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-27 19:04:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 105. [2019-12-27 19:04:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 19:04:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 19:04:15,048 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 19:04:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:15,048 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 19:04:15,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 19:04:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:15,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:15,049 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:15,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:15,253 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash -362120709, now seen corresponding path program 52 times [2019-12-27 19:04:15,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:15,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751205022] [2019-12-27 19:04:15,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:15,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751205022] [2019-12-27 19:04:15,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649869726] [2019-12-27 19:04:15,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:15,422 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:15,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:15,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:15,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:15,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:15,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:15,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1322610510] [2019-12-27 19:04:15,481 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:15,483 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:15,486 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 19:04:15,486 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:15,529 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:04:15,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:15,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:15,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:15,530 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 13 states. [2019-12-27 19:04:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:15,805 INFO L93 Difference]: Finished difference Result 264 states and 580 transitions. [2019-12-27 19:04:15,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:04:15,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:15,807 INFO L225 Difference]: With dead ends: 264 [2019-12-27 19:04:15,807 INFO L226 Difference]: Without dead ends: 262 [2019-12-27 19:04:15,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-27 19:04:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 107. [2019-12-27 19:04:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 19:04:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2019-12-27 19:04:15,811 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 16 [2019-12-27 19:04:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:15,811 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2019-12-27 19:04:15,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2019-12-27 19:04:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:15,812 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:15,812 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:16,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:16,013 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 596523880, now seen corresponding path program 53 times [2019-12-27 19:04:16,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:16,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577935239] [2019-12-27 19:04:16,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:16,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577935239] [2019-12-27 19:04:16,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995594010] [2019-12-27 19:04:16,122 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:16,206 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:16,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:16,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:16,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:04:16,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:16,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 19:04:16,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535683357] [2019-12-27 19:04:16,229 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:16,230 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:16,232 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:16,232 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:16,233 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:16,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:16,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:16,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:04:16,234 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand 11 states. [2019-12-27 19:04:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:16,379 INFO L93 Difference]: Finished difference Result 237 states and 528 transitions. [2019-12-27 19:04:16,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:16,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:16,382 INFO L225 Difference]: With dead ends: 237 [2019-12-27 19:04:16,382 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 19:04:16,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:04:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 19:04:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 107. [2019-12-27 19:04:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 19:04:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2019-12-27 19:04:16,386 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 16 [2019-12-27 19:04:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:16,387 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2019-12-27 19:04:16,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2019-12-27 19:04:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:16,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:16,387 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:16,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:16,588 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash -804520581, now seen corresponding path program 54 times [2019-12-27 19:04:16,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:16,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170741201] [2019-12-27 19:04:16,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:16,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170741201] [2019-12-27 19:04:16,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490834433] [2019-12-27 19:04:16,649 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:16,717 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:16,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:16,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:04:16,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:16,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:16,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 19:04:16,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723938584] [2019-12-27 19:04:16,762 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:16,763 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:16,764 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:16,764 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:16,766 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:16,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:16,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:16,766 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand 11 states. [2019-12-27 19:04:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:16,948 INFO L93 Difference]: Finished difference Result 253 states and 554 transitions. [2019-12-27 19:04:16,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:16,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:16,951 INFO L225 Difference]: With dead ends: 253 [2019-12-27 19:04:16,951 INFO L226 Difference]: Without dead ends: 251 [2019-12-27 19:04:16,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-12-27 19:04:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 105. [2019-12-27 19:04:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 19:04:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 19:04:16,955 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 19:04:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:16,956 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 19:04:16,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 19:04:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:16,956 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:16,957 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:17,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:17,159 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:17,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1693487541, now seen corresponding path program 55 times [2019-12-27 19:04:17,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:17,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174240245] [2019-12-27 19:04:17,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:17,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174240245] [2019-12-27 19:04:17,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761556845] [2019-12-27 19:04:17,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:17,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:04:17,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:17,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:17,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 19:04:17,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [983213631] [2019-12-27 19:04:17,327 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:17,328 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:17,329 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:17,329 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:17,358 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:17,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:17,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:17,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:17,359 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 13 states. [2019-12-27 19:04:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:17,644 INFO L93 Difference]: Finished difference Result 253 states and 561 transitions. [2019-12-27 19:04:17,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:17,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:17,646 INFO L225 Difference]: With dead ends: 253 [2019-12-27 19:04:17,646 INFO L226 Difference]: Without dead ends: 251 [2019-12-27 19:04:17,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:04:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-12-27 19:04:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 106. [2019-12-27 19:04:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:04:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 19:04:17,651 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 19:04:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:17,651 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 19:04:17,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 19:04:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:17,652 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:17,652 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:17,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:17,855 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1642835166, now seen corresponding path program 56 times [2019-12-27 19:04:17,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:17,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110043765] [2019-12-27 19:04:17,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:17,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110043765] [2019-12-27 19:04:17,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155813394] [2019-12-27 19:04:17,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:17,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:17,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:17,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:17,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:04:18,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:18,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 19:04:18,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1675538922] [2019-12-27 19:04:18,004 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:18,005 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:18,007 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:18,007 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:18,007 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:18,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:18,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:04:18,008 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 19:04:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:18,176 INFO L93 Difference]: Finished difference Result 227 states and 512 transitions. [2019-12-27 19:04:18,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:18,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:18,178 INFO L225 Difference]: With dead ends: 227 [2019-12-27 19:04:18,178 INFO L226 Difference]: Without dead ends: 225 [2019-12-27 19:04:18,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:04:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-27 19:04:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 106. [2019-12-27 19:04:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:04:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 19:04:18,182 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 19:04:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:18,183 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 19:04:18,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 19:04:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:18,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:18,184 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:18,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:18,387 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1251087669, now seen corresponding path program 57 times [2019-12-27 19:04:18,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:18,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68790887] [2019-12-27 19:04:18,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:18,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68790887] [2019-12-27 19:04:18,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65258668] [2019-12-27 19:04:18,442 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:18,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:04:18,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:18,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:18,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:18,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:18,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:18,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2031856041] [2019-12-27 19:04:18,536 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:18,537 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:18,539 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 19:04:18,539 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:18,539 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:18,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:18,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:18,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:18,540 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 19:04:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:18,753 INFO L93 Difference]: Finished difference Result 254 states and 568 transitions. [2019-12-27 19:04:18,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:04:18,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:18,755 INFO L225 Difference]: With dead ends: 254 [2019-12-27 19:04:18,755 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 19:04:18,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:04:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 19:04:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 105. [2019-12-27 19:04:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 19:04:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 19:04:18,759 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 19:04:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:18,759 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 19:04:18,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 19:04:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:18,760 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:18,760 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:18,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:18,964 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2125540497, now seen corresponding path program 58 times [2019-12-27 19:04:18,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:18,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604880500] [2019-12-27 19:04:18,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:19,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604880500] [2019-12-27 19:04:19,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206562240] [2019-12-27 19:04:19,032 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:19,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:19,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:19,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:19,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:19,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:19,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:19,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [212905337] [2019-12-27 19:04:19,122 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:19,123 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:19,125 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:19,125 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:19,126 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:19,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:19,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:19,126 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 19:04:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:19,297 INFO L93 Difference]: Finished difference Result 254 states and 568 transitions. [2019-12-27 19:04:19,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:04:19,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:19,300 INFO L225 Difference]: With dead ends: 254 [2019-12-27 19:04:19,300 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 19:04:19,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:04:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 19:04:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 101. [2019-12-27 19:04:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:04:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 231 transitions. [2019-12-27 19:04:19,304 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 231 transitions. Word has length 16 [2019-12-27 19:04:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:19,304 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 231 transitions. [2019-12-27 19:04:19,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 231 transitions. [2019-12-27 19:04:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:19,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:19,305 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:19,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:19,508 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1141614834, now seen corresponding path program 59 times [2019-12-27 19:04:19,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:19,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368055729] [2019-12-27 19:04:19,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:19,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368055729] [2019-12-27 19:04:19,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95391634] [2019-12-27 19:04:19,581 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:19,639 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:04:19,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:19,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:19,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:19,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:19,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:19,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [802083499] [2019-12-27 19:04:19,662 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:19,663 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:19,665 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 19:04:19,665 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:19,717 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:04:19,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:04:19,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:04:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:19,718 INFO L87 Difference]: Start difference. First operand 101 states and 231 transitions. Second operand 15 states. [2019-12-27 19:04:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:20,166 INFO L93 Difference]: Finished difference Result 287 states and 616 transitions. [2019-12-27 19:04:20,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:04:20,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-27 19:04:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:20,168 INFO L225 Difference]: With dead ends: 287 [2019-12-27 19:04:20,169 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 19:04:20,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:04:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 19:04:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 106. [2019-12-27 19:04:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:04:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 19:04:20,172 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 19:04:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:20,173 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 19:04:20,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:04:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 19:04:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:20,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:20,173 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:20,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:20,374 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash 992833851, now seen corresponding path program 60 times [2019-12-27 19:04:20,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:20,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805919526] [2019-12-27 19:04:20,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:20,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805919526] [2019-12-27 19:04:20,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603604969] [2019-12-27 19:04:20,443 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:20,514 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:04:20,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:20,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:04:20,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:20,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:20,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 19:04:20,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605006099] [2019-12-27 19:04:20,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:20,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:20,565 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 19:04:20,565 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:20,593 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:20,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:20,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:20,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:20,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:20,594 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 13 states. [2019-12-27 19:04:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:20,894 INFO L93 Difference]: Finished difference Result 262 states and 573 transitions. [2019-12-27 19:04:20,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:20,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:20,897 INFO L225 Difference]: With dead ends: 262 [2019-12-27 19:04:20,897 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 19:04:20,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:04:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 19:04:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 107. [2019-12-27 19:04:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 19:04:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 253 transitions. [2019-12-27 19:04:20,901 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 253 transitions. Word has length 16 [2019-12-27 19:04:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:20,902 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 253 transitions. [2019-12-27 19:04:20,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 253 transitions. [2019-12-27 19:04:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:20,902 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:20,902 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:21,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:21,105 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1951478440, now seen corresponding path program 61 times [2019-12-27 19:04:21,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:21,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267957097] [2019-12-27 19:04:21,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:21,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267957097] [2019-12-27 19:04:21,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124469337] [2019-12-27 19:04:21,183 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:21,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:21,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:04:21,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:21,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 19:04:21,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [492196525] [2019-12-27 19:04:21,260 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:21,261 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:21,262 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 19:04:21,262 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:21,263 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:21,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:21,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:21,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:21,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:04:21,263 INFO L87 Difference]: Start difference. First operand 107 states and 253 transitions. Second operand 11 states. [2019-12-27 19:04:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:21,434 INFO L93 Difference]: Finished difference Result 229 states and 507 transitions. [2019-12-27 19:04:21,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:04:21,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:21,436 INFO L225 Difference]: With dead ends: 229 [2019-12-27 19:04:21,436 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 19:04:21,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:04:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 19:04:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 107. [2019-12-27 19:04:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 19:04:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 253 transitions. [2019-12-27 19:04:21,440 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 253 transitions. Word has length 16 [2019-12-27 19:04:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:21,441 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 253 transitions. [2019-12-27 19:04:21,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 253 transitions. [2019-12-27 19:04:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:21,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:21,442 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:21,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:21,646 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash 550433979, now seen corresponding path program 62 times [2019-12-27 19:04:21,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:21,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546273969] [2019-12-27 19:04:21,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:21,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546273969] [2019-12-27 19:04:21,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622024814] [2019-12-27 19:04:21,702 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:21,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:21,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:21,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:21,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:21,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:21,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:21,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1350700931] [2019-12-27 19:04:21,786 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:21,787 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:21,788 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 19:04:21,788 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:21,789 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:21,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:21,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:21,790 INFO L87 Difference]: Start difference. First operand 107 states and 253 transitions. Second operand 11 states. [2019-12-27 19:04:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:22,005 INFO L93 Difference]: Finished difference Result 259 states and 566 transitions. [2019-12-27 19:04:22,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:04:22,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:22,007 INFO L225 Difference]: With dead ends: 259 [2019-12-27 19:04:22,007 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 19:04:22,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 19:04:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 106. [2019-12-27 19:04:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:04:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 19:04:22,010 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 19:04:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:22,010 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 19:04:22,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 19:04:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:22,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:22,011 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:22,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:22,214 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1468773109, now seen corresponding path program 63 times [2019-12-27 19:04:22,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:22,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733844406] [2019-12-27 19:04:22,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:22,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733844406] [2019-12-27 19:04:22,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427806865] [2019-12-27 19:04:22,299 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:22,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:22,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:22,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:22,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:22,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:22,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:22,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1597302712] [2019-12-27 19:04:22,386 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:22,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:22,388 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 19:04:22,388 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:22,389 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:22,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:22,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:22,390 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 19:04:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:22,609 INFO L93 Difference]: Finished difference Result 259 states and 569 transitions. [2019-12-27 19:04:22,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:04:22,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:22,612 INFO L225 Difference]: With dead ends: 259 [2019-12-27 19:04:22,612 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 19:04:22,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 19:04:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 103. [2019-12-27 19:04:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:04:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 238 transitions. [2019-12-27 19:04:22,616 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 238 transitions. Word has length 16 [2019-12-27 19:04:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:22,616 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 238 transitions. [2019-12-27 19:04:22,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 238 transitions. [2019-12-27 19:04:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:22,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:22,617 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:22,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:22,818 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:22,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1086129522, now seen corresponding path program 64 times [2019-12-27 19:04:22,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:22,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238712374] [2019-12-27 19:04:22,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:22,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238712374] [2019-12-27 19:04:22,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270942898] [2019-12-27 19:04:22,877 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:22,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:22,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:22,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:22,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:22,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:22,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2019-12-27 19:04:22,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1428713970] [2019-12-27 19:04:22,985 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:22,986 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:22,988 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 19:04:22,989 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:23,019 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:23,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:23,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:23,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:23,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:04:23,020 INFO L87 Difference]: Start difference. First operand 103 states and 238 transitions. Second operand 13 states. [2019-12-27 19:04:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:23,303 INFO L93 Difference]: Finished difference Result 274 states and 591 transitions. [2019-12-27 19:04:23,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:04:23,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 19:04:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:23,306 INFO L225 Difference]: With dead ends: 274 [2019-12-27 19:04:23,306 INFO L226 Difference]: Without dead ends: 272 [2019-12-27 19:04:23,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:04:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-27 19:04:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 106. [2019-12-27 19:04:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:04:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 19:04:23,310 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 19:04:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:23,310 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 19:04:23,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 19:04:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:23,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:23,311 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:23,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:23,514 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:23,515 INFO L82 PathProgramCache]: Analyzing trace with hash -127484933, now seen corresponding path program 65 times [2019-12-27 19:04:23,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:23,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949441251] [2019-12-27 19:04:23,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:23,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949441251] [2019-12-27 19:04:23,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327701014] [2019-12-27 19:04:23,569 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:23,629 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:04:23,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:23,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:23,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:23,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:23,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:23,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [114566245] [2019-12-27 19:04:23,662 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:23,663 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:23,664 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:04:23,664 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:23,665 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:23,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:23,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:23,665 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 19:04:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:23,874 INFO L93 Difference]: Finished difference Result 251 states and 545 transitions. [2019-12-27 19:04:23,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:04:23,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:23,876 INFO L225 Difference]: With dead ends: 251 [2019-12-27 19:04:23,876 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 19:04:23,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 19:04:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 105. [2019-12-27 19:04:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 19:04:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 19:04:23,880 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 19:04:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:23,880 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 19:04:23,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 19:04:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:04:23,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:23,881 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:24,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:24,085 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:24,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1528529394, now seen corresponding path program 66 times [2019-12-27 19:04:24,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:24,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420215369] [2019-12-27 19:04:24,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:24,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420215369] [2019-12-27 19:04:24,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804999484] [2019-12-27 19:04:24,143 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:24,208 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:04:24,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:24,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:24,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:24,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:24,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 19:04:24,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [289356463] [2019-12-27 19:04:24,232 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:24,233 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:24,234 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 19:04:24,234 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:24,235 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:24,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:04:24,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:04:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:24,235 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 19:04:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:24,452 INFO L93 Difference]: Finished difference Result 271 states and 583 transitions. [2019-12-27 19:04:24,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:24,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 19:04:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:24,455 INFO L225 Difference]: With dead ends: 271 [2019-12-27 19:04:24,455 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 19:04:24,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 19:04:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 98. [2019-12-27 19:04:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:04:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 224 transitions. [2019-12-27 19:04:24,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 224 transitions. Word has length 16 [2019-12-27 19:04:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:24,458 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 224 transitions. [2019-12-27 19:04:24,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:04:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 224 transitions. [2019-12-27 19:04:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:24,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:24,459 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:24,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:24,662 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1092314409, now seen corresponding path program 67 times [2019-12-27 19:04:24,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:24,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748018752] [2019-12-27 19:04:24,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:24,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748018752] [2019-12-27 19:04:24,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790109514] [2019-12-27 19:04:24,728 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:24,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:24,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:24,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:24,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:24,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2142822229] [2019-12-27 19:04:24,817 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:24,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:24,819 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 19:04:24,819 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:24,819 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:24,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:24,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:24,820 INFO L87 Difference]: Start difference. First operand 98 states and 224 transitions. Second operand 12 states. [2019-12-27 19:04:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:25,136 INFO L93 Difference]: Finished difference Result 311 states and 642 transitions. [2019-12-27 19:04:25,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:04:25,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:25,139 INFO L225 Difference]: With dead ends: 311 [2019-12-27 19:04:25,139 INFO L226 Difference]: Without dead ends: 309 [2019-12-27 19:04:25,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:04:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-27 19:04:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 100. [2019-12-27 19:04:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:04:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 231 transitions. [2019-12-27 19:04:25,143 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 231 transitions. Word has length 17 [2019-12-27 19:04:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:25,143 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 231 transitions. [2019-12-27 19:04:25,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 231 transitions. [2019-12-27 19:04:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:25,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:25,144 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:25,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:25,346 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:25,346 INFO L82 PathProgramCache]: Analyzing trace with hash 744359197, now seen corresponding path program 68 times [2019-12-27 19:04:25,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:25,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090665485] [2019-12-27 19:04:25,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:25,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090665485] [2019-12-27 19:04:25,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164640938] [2019-12-27 19:04:25,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:25,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:25,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:25,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:25,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:25,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:25,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:25,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [333875869] [2019-12-27 19:04:25,509 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:25,511 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:25,513 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 19:04:25,513 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:25,541 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:25,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:25,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:25,542 INFO L87 Difference]: Start difference. First operand 100 states and 231 transitions. Second operand 14 states. [2019-12-27 19:04:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:25,926 INFO L93 Difference]: Finished difference Result 303 states and 638 transitions. [2019-12-27 19:04:25,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:04:25,926 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:25,929 INFO L225 Difference]: With dead ends: 303 [2019-12-27 19:04:25,929 INFO L226 Difference]: Without dead ends: 301 [2019-12-27 19:04:25,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:04:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-27 19:04:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 104. [2019-12-27 19:04:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 19:04:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 246 transitions. [2019-12-27 19:04:25,932 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 246 transitions. Word has length 17 [2019-12-27 19:04:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:25,933 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 246 transitions. [2019-12-27 19:04:25,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 246 transitions. [2019-12-27 19:04:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:25,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:25,933 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:26,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:26,134 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1703003786, now seen corresponding path program 69 times [2019-12-27 19:04:26,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:26,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967363830] [2019-12-27 19:04:26,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:26,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967363830] [2019-12-27 19:04:26,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007318142] [2019-12-27 19:04:26,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:26,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:26,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:26,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:26,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:04:26,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:26,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:26,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378355237] [2019-12-27 19:04:26,324 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:26,325 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:26,327 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 19:04:26,327 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:26,327 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:26,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:26,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:26,328 INFO L87 Difference]: Start difference. First operand 104 states and 246 transitions. Second operand 12 states. [2019-12-27 19:04:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:26,604 INFO L93 Difference]: Finished difference Result 273 states and 578 transitions. [2019-12-27 19:04:26,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:26,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:26,606 INFO L225 Difference]: With dead ends: 273 [2019-12-27 19:04:26,606 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 19:04:26,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 19:04:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 103. [2019-12-27 19:04:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:04:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 242 transitions. [2019-12-27 19:04:26,609 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 242 transitions. Word has length 17 [2019-12-27 19:04:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:26,611 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 242 transitions. [2019-12-27 19:04:26,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 242 transitions. [2019-12-27 19:04:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:26,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:26,611 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:26,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:26,812 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash 301959325, now seen corresponding path program 70 times [2019-12-27 19:04:26,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:26,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849623285] [2019-12-27 19:04:26,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:26,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849623285] [2019-12-27 19:04:26,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890280316] [2019-12-27 19:04:26,948 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:27,002 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:27,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:27,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:27,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:27,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:27,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:27,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [411062175] [2019-12-27 19:04:27,036 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:27,037 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:27,039 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:27,039 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:27,039 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:27,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:27,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:27,040 INFO L87 Difference]: Start difference. First operand 103 states and 242 transitions. Second operand 12 states. [2019-12-27 19:04:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:27,351 INFO L93 Difference]: Finished difference Result 299 states and 634 transitions. [2019-12-27 19:04:27,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:04:27,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:27,354 INFO L225 Difference]: With dead ends: 299 [2019-12-27 19:04:27,354 INFO L226 Difference]: Without dead ends: 297 [2019-12-27 19:04:27,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:04:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-27 19:04:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 102. [2019-12-27 19:04:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:04:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 238 transitions. [2019-12-27 19:04:27,357 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 238 transitions. Word has length 17 [2019-12-27 19:04:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:27,358 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 238 transitions. [2019-12-27 19:04:27,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 238 transitions. [2019-12-27 19:04:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:27,358 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:27,358 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:27,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:27,559 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1220298455, now seen corresponding path program 71 times [2019-12-27 19:04:27,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:27,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993234193] [2019-12-27 19:04:27,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:27,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993234193] [2019-12-27 19:04:27,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082966813] [2019-12-27 19:04:27,620 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:27,669 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:04:27,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:27,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:27,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:27,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:27,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:27,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1054853353] [2019-12-27 19:04:27,717 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:27,718 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:27,721 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 19:04:27,721 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:27,721 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:27,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:27,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:27,722 INFO L87 Difference]: Start difference. First operand 102 states and 238 transitions. Second operand 12 states. [2019-12-27 19:04:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:28,045 INFO L93 Difference]: Finished difference Result 304 states and 639 transitions. [2019-12-27 19:04:28,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:04:28,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:28,048 INFO L225 Difference]: With dead ends: 304 [2019-12-27 19:04:28,048 INFO L226 Difference]: Without dead ends: 302 [2019-12-27 19:04:28,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:04:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-12-27 19:04:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 104. [2019-12-27 19:04:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 19:04:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 243 transitions. [2019-12-27 19:04:28,051 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 243 transitions. Word has length 17 [2019-12-27 19:04:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:28,052 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 243 transitions. [2019-12-27 19:04:28,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 243 transitions. [2019-12-27 19:04:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:28,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:28,052 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:28,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:28,253 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:28,254 INFO L82 PathProgramCache]: Analyzing trace with hash 556135907, now seen corresponding path program 72 times [2019-12-27 19:04:28,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:28,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637680033] [2019-12-27 19:04:28,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:28,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637680033] [2019-12-27 19:04:28,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812194334] [2019-12-27 19:04:28,322 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:28,384 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:04:28,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:28,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:28,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:28,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975569587] [2019-12-27 19:04:28,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:28,419 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:28,421 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 19:04:28,421 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:28,477 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:28,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:04:28,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:28,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:04:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:28,479 INFO L87 Difference]: Start difference. First operand 104 states and 243 transitions. Second operand 16 states. [2019-12-27 19:04:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:29,011 INFO L93 Difference]: Finished difference Result 315 states and 687 transitions. [2019-12-27 19:04:29,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:04:29,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 19:04:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:29,014 INFO L225 Difference]: With dead ends: 315 [2019-12-27 19:04:29,014 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 19:04:29,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=1261, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:04:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 19:04:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 110. [2019-12-27 19:04:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-27 19:04:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 265 transitions. [2019-12-27 19:04:29,017 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 265 transitions. Word has length 17 [2019-12-27 19:04:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:29,018 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 265 transitions. [2019-12-27 19:04:29,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:04:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 265 transitions. [2019-12-27 19:04:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:29,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:29,018 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:29,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:29,219 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1604382704, now seen corresponding path program 73 times [2019-12-27 19:04:29,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:29,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081425228] [2019-12-27 19:04:29,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:29,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081425228] [2019-12-27 19:04:29,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780618198] [2019-12-27 19:04:29,280 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:29,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:04:29,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:29,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:29,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 19:04:29,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783961572] [2019-12-27 19:04:29,398 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:29,399 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:29,400 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:29,400 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:29,431 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:29,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:29,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:29,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:29,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:29,432 INFO L87 Difference]: Start difference. First operand 110 states and 265 transitions. Second operand 14 states. [2019-12-27 19:04:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:29,781 INFO L93 Difference]: Finished difference Result 279 states and 618 transitions. [2019-12-27 19:04:29,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:04:29,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:29,784 INFO L225 Difference]: With dead ends: 279 [2019-12-27 19:04:29,784 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 19:04:29,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:04:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 19:04:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 111. [2019-12-27 19:04:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:04:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 269 transitions. [2019-12-27 19:04:29,788 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 269 transitions. Word has length 17 [2019-12-27 19:04:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:29,788 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 269 transitions. [2019-12-27 19:04:29,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 269 transitions. [2019-12-27 19:04:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:29,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:29,789 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:29,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:29,992 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -645738115, now seen corresponding path program 74 times [2019-12-27 19:04:29,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:29,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037139898] [2019-12-27 19:04:29,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:30,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037139898] [2019-12-27 19:04:30,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531206307] [2019-12-27 19:04:30,056 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:30,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:30,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:30,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:30,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 19:04:30,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:30,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:30,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1000253172] [2019-12-27 19:04:30,131 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:30,132 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:30,134 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 19:04:30,134 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:30,134 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:30,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:30,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:30,135 INFO L87 Difference]: Start difference. First operand 111 states and 269 transitions. Second operand 12 states. [2019-12-27 19:04:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:30,315 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2019-12-27 19:04:30,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:30,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:30,317 INFO L225 Difference]: With dead ends: 239 [2019-12-27 19:04:30,317 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 19:04:30,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 19:04:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 112. [2019-12-27 19:04:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:04:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 270 transitions. [2019-12-27 19:04:30,320 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 270 transitions. Word has length 17 [2019-12-27 19:04:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:30,321 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 270 transitions. [2019-12-27 19:04:30,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 270 transitions. [2019-12-27 19:04:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:30,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:30,321 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:30,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:30,522 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:30,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2046782576, now seen corresponding path program 75 times [2019-12-27 19:04:30,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:30,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875556883] [2019-12-27 19:04:30,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:30,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875556883] [2019-12-27 19:04:30,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283142276] [2019-12-27 19:04:30,583 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:30,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:30,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:30,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:30,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:04:30,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:30,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:30,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1251843965] [2019-12-27 19:04:30,682 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:30,683 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:30,685 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:30,685 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:30,685 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:30,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:30,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:30,686 INFO L87 Difference]: Start difference. First operand 112 states and 270 transitions. Second operand 12 states. [2019-12-27 19:04:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:30,946 INFO L93 Difference]: Finished difference Result 288 states and 642 transitions. [2019-12-27 19:04:30,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:30,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:30,948 INFO L225 Difference]: With dead ends: 288 [2019-12-27 19:04:30,948 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 19:04:30,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 19:04:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 111. [2019-12-27 19:04:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:04:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 266 transitions. [2019-12-27 19:04:30,952 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 266 transitions. Word has length 17 [2019-12-27 19:04:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:30,952 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 266 transitions. [2019-12-27 19:04:30,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 266 transitions. [2019-12-27 19:04:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:30,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:30,953 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:31,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:31,156 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1128443446, now seen corresponding path program 76 times [2019-12-27 19:04:31,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:31,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838557182] [2019-12-27 19:04:31,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:31,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838557182] [2019-12-27 19:04:31,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068599411] [2019-12-27 19:04:31,217 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:31,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:31,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:31,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:31,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:31,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:31,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:31,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [4755575] [2019-12-27 19:04:31,296 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:31,298 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:31,300 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:31,300 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:31,300 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:31,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:31,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:31,301 INFO L87 Difference]: Start difference. First operand 111 states and 266 transitions. Second operand 12 states. [2019-12-27 19:04:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:31,550 INFO L93 Difference]: Finished difference Result 288 states and 641 transitions. [2019-12-27 19:04:31,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:31,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:31,553 INFO L225 Difference]: With dead ends: 288 [2019-12-27 19:04:31,553 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 19:04:31,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 19:04:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 108. [2019-12-27 19:04:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-12-27 19:04:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 255 transitions. [2019-12-27 19:04:31,557 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 255 transitions. Word has length 17 [2019-12-27 19:04:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:31,557 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 255 transitions. [2019-12-27 19:04:31,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 255 transitions. [2019-12-27 19:04:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:31,558 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:31,558 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:31,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:31,761 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash 611621219, now seen corresponding path program 77 times [2019-12-27 19:04:31,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:31,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758350402] [2019-12-27 19:04:31,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:31,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758350402] [2019-12-27 19:04:31,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154840605] [2019-12-27 19:04:31,834 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:31,880 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:04:31,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:31,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:31,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:31,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:31,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:31,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900293216] [2019-12-27 19:04:31,923 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:31,924 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:31,926 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:31,926 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:31,954 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:31,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:31,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:31,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:31,955 INFO L87 Difference]: Start difference. First operand 108 states and 255 transitions. Second operand 14 states. [2019-12-27 19:04:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:32,312 INFO L93 Difference]: Finished difference Result 306 states and 674 transitions. [2019-12-27 19:04:32,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:04:32,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:32,315 INFO L225 Difference]: With dead ends: 306 [2019-12-27 19:04:32,315 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 19:04:32,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:04:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 19:04:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 111. [2019-12-27 19:04:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:04:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 266 transitions. [2019-12-27 19:04:32,319 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 266 transitions. Word has length 17 [2019-12-27 19:04:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:32,319 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 266 transitions. [2019-12-27 19:04:32,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 266 transitions. [2019-12-27 19:04:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:32,320 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:32,320 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:32,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:32,521 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1570265808, now seen corresponding path program 78 times [2019-12-27 19:04:32,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:32,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282253406] [2019-12-27 19:04:32,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:32,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282253406] [2019-12-27 19:04:32,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243378669] [2019-12-27 19:04:32,597 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:32,689 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:32,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:32,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:32,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:04:32,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:32,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:32,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [982466842] [2019-12-27 19:04:32,725 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:32,727 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:32,730 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:32,730 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:32,731 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:32,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:32,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:32,732 INFO L87 Difference]: Start difference. First operand 111 states and 266 transitions. Second operand 12 states. [2019-12-27 19:04:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:32,988 INFO L93 Difference]: Finished difference Result 291 states and 646 transitions. [2019-12-27 19:04:32,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:32,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:32,990 INFO L225 Difference]: With dead ends: 291 [2019-12-27 19:04:32,991 INFO L226 Difference]: Without dead ends: 289 [2019-12-27 19:04:32,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-12-27 19:04:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 110. [2019-12-27 19:04:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-27 19:04:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 262 transitions. [2019-12-27 19:04:32,994 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 262 transitions. Word has length 17 [2019-12-27 19:04:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:32,994 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 262 transitions. [2019-12-27 19:04:32,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 262 transitions. [2019-12-27 19:04:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:32,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:32,995 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:33,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:33,196 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:33,196 INFO L82 PathProgramCache]: Analyzing trace with hash 169221347, now seen corresponding path program 79 times [2019-12-27 19:04:33,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:33,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557390202] [2019-12-27 19:04:33,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:33,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557390202] [2019-12-27 19:04:33,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042957195] [2019-12-27 19:04:33,269 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:33,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:33,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:33,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:33,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:33,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1019771705] [2019-12-27 19:04:33,359 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:33,360 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:33,361 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:33,361 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:33,361 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:33,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:33,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:33,362 INFO L87 Difference]: Start difference. First operand 110 states and 262 transitions. Second operand 12 states. [2019-12-27 19:04:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:33,645 INFO L93 Difference]: Finished difference Result 308 states and 680 transitions. [2019-12-27 19:04:33,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:04:33,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:33,647 INFO L225 Difference]: With dead ends: 308 [2019-12-27 19:04:33,648 INFO L226 Difference]: Without dead ends: 306 [2019-12-27 19:04:33,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:04:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-12-27 19:04:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 107. [2019-12-27 19:04:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 19:04:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 251 transitions. [2019-12-27 19:04:33,651 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 251 transitions. Word has length 17 [2019-12-27 19:04:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:33,651 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 251 transitions. [2019-12-27 19:04:33,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 251 transitions. [2019-12-27 19:04:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:33,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:33,651 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:33,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:33,852 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1627737827, now seen corresponding path program 80 times [2019-12-27 19:04:33,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:33,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728638009] [2019-12-27 19:04:33,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:33,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728638009] [2019-12-27 19:04:33,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042766665] [2019-12-27 19:04:33,916 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:33,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:33,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:33,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:33,980 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:34,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:34,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:34,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2146266545] [2019-12-27 19:04:34,013 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:34,014 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:34,015 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:34,015 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:34,043 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:34,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:34,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:34,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:34,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:34,044 INFO L87 Difference]: Start difference. First operand 107 states and 251 transitions. Second operand 14 states. [2019-12-27 19:04:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:34,441 INFO L93 Difference]: Finished difference Result 306 states and 671 transitions. [2019-12-27 19:04:34,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:04:34,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:34,443 INFO L225 Difference]: With dead ends: 306 [2019-12-27 19:04:34,443 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 19:04:34,443 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=990, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:04:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 19:04:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 113. [2019-12-27 19:04:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:04:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 271 transitions. [2019-12-27 19:04:34,447 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 271 transitions. Word has length 17 [2019-12-27 19:04:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:34,447 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 271 transitions. [2019-12-27 19:04:34,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 271 transitions. [2019-12-27 19:04:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:34,448 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:34,448 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:34,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:34,651 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:34,652 INFO L82 PathProgramCache]: Analyzing trace with hash -669093238, now seen corresponding path program 81 times [2019-12-27 19:04:34,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:34,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398443846] [2019-12-27 19:04:34,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:34,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398443846] [2019-12-27 19:04:34,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129509864] [2019-12-27 19:04:34,726 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:34,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:34,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:34,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:34,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:04:34,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:34,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:34,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [432964782] [2019-12-27 19:04:34,841 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:34,843 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:34,845 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 19:04:34,845 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:34,845 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:34,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:34,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:34,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:34,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:34,846 INFO L87 Difference]: Start difference. First operand 113 states and 271 transitions. Second operand 12 states. [2019-12-27 19:04:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:35,134 INFO L93 Difference]: Finished difference Result 288 states and 635 transitions. [2019-12-27 19:04:35,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:35,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:35,137 INFO L225 Difference]: With dead ends: 288 [2019-12-27 19:04:35,137 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 19:04:35,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 19:04:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 112. [2019-12-27 19:04:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:04:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 267 transitions. [2019-12-27 19:04:35,142 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 267 transitions. Word has length 17 [2019-12-27 19:04:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:35,142 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 267 transitions. [2019-12-27 19:04:35,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 267 transitions. [2019-12-27 19:04:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:35,143 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:35,143 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:35,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:35,346 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2070137699, now seen corresponding path program 82 times [2019-12-27 19:04:35,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:35,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630196705] [2019-12-27 19:04:35,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:35,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630196705] [2019-12-27 19:04:35,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226624187] [2019-12-27 19:04:35,422 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:35,482 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:35,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:35,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:35,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:35,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:35,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:35,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1149508409] [2019-12-27 19:04:35,530 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:35,531 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:35,533 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:35,533 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:35,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:35,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:35,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:35,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:35,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:35,533 INFO L87 Difference]: Start difference. First operand 112 states and 267 transitions. Second operand 12 states. [2019-12-27 19:04:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:35,851 INFO L93 Difference]: Finished difference Result 298 states and 658 transitions. [2019-12-27 19:04:35,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:04:35,851 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:35,853 INFO L225 Difference]: With dead ends: 298 [2019-12-27 19:04:35,854 INFO L226 Difference]: Without dead ends: 296 [2019-12-27 19:04:35,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:04:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-27 19:04:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 111. [2019-12-27 19:04:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:04:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 263 transitions. [2019-12-27 19:04:35,857 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 263 transitions. Word has length 17 [2019-12-27 19:04:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:35,857 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 263 transitions. [2019-12-27 19:04:35,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 263 transitions. [2019-12-27 19:04:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:35,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:35,858 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:36,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:36,059 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1151798569, now seen corresponding path program 83 times [2019-12-27 19:04:36,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:36,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709283219] [2019-12-27 19:04:36,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:36,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709283219] [2019-12-27 19:04:36,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787000893] [2019-12-27 19:04:36,126 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:36,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:04:36,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:36,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:36,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:36,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:36,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:36,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1312329093] [2019-12-27 19:04:36,209 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:36,211 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:36,213 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:36,213 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:36,213 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:36,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:36,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:36,214 INFO L87 Difference]: Start difference. First operand 111 states and 263 transitions. Second operand 12 states. [2019-12-27 19:04:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:36,519 INFO L93 Difference]: Finished difference Result 310 states and 676 transitions. [2019-12-27 19:04:36,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:04:36,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:36,522 INFO L225 Difference]: With dead ends: 310 [2019-12-27 19:04:36,522 INFO L226 Difference]: Without dead ends: 308 [2019-12-27 19:04:36,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:04:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2019-12-27 19:04:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 109. [2019-12-27 19:04:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-27 19:04:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 256 transitions. [2019-12-27 19:04:36,526 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 256 transitions. Word has length 17 [2019-12-27 19:04:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:36,526 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 256 transitions. [2019-12-27 19:04:36,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 256 transitions. [2019-12-27 19:04:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:36,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:36,527 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:36,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:36,728 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:36,729 INFO L82 PathProgramCache]: Analyzing trace with hash 62180649, now seen corresponding path program 84 times [2019-12-27 19:04:36,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:36,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139923497] [2019-12-27 19:04:36,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:36,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139923497] [2019-12-27 19:04:36,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675475004] [2019-12-27 19:04:36,805 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:36,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:36,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:36,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:36,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:04:36,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:36,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:36,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [615296484] [2019-12-27 19:04:36,902 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:36,903 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:36,905 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 19:04:36,905 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:37,043 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 19:04:37,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:04:37,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:37,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:04:37,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:04:37,044 INFO L87 Difference]: Start difference. First operand 109 states and 256 transitions. Second operand 18 states. [2019-12-27 19:04:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:37,701 INFO L93 Difference]: Finished difference Result 339 states and 742 transitions. [2019-12-27 19:04:37,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:04:37,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2019-12-27 19:04:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:37,704 INFO L225 Difference]: With dead ends: 339 [2019-12-27 19:04:37,704 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 19:04:37,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=682, Invalid=1670, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:04:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 19:04:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 113. [2019-12-27 19:04:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:04:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 270 transitions. [2019-12-27 19:04:37,710 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 270 transitions. Word has length 17 [2019-12-27 19:04:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:37,710 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 270 transitions. [2019-12-27 19:04:37,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:04:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 270 transitions. [2019-12-27 19:04:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:37,710 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:37,711 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:37,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:37,914 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:37,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1727000554, now seen corresponding path program 85 times [2019-12-27 19:04:37,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:37,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125312698] [2019-12-27 19:04:37,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:37,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125312698] [2019-12-27 19:04:37,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861288065] [2019-12-27 19:04:37,975 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:38,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:04:38,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:38,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:38,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 19:04:38,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [226618995] [2019-12-27 19:04:38,085 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:38,086 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:38,088 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 19:04:38,088 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:38,153 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 19:04:38,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:04:38,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:38,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:04:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:04:38,154 INFO L87 Difference]: Start difference. First operand 113 states and 270 transitions. Second operand 16 states. [2019-12-27 19:04:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:38,587 INFO L93 Difference]: Finished difference Result 299 states and 664 transitions. [2019-12-27 19:04:38,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:04:38,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 19:04:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:38,590 INFO L225 Difference]: With dead ends: 299 [2019-12-27 19:04:38,590 INFO L226 Difference]: Without dead ends: 297 [2019-12-27 19:04:38,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:04:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-27 19:04:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 113. [2019-12-27 19:04:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:04:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 270 transitions. [2019-12-27 19:04:38,593 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 270 transitions. Word has length 17 [2019-12-27 19:04:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:38,594 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 270 transitions. [2019-12-27 19:04:38,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:04:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 270 transitions. [2019-12-27 19:04:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:38,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:38,594 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:38,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:38,795 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash 407448131, now seen corresponding path program 86 times [2019-12-27 19:04:38,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:38,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274200108] [2019-12-27 19:04:38,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:38,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274200108] [2019-12-27 19:04:38,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96137200] [2019-12-27 19:04:38,867 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:38,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:38,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:38,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:04:38,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:39,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:39,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2019-12-27 19:04:39,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351051727] [2019-12-27 19:04:39,007 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:39,008 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:39,009 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 19:04:39,010 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:39,044 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 19:04:39,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:39,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:04:39,045 INFO L87 Difference]: Start difference. First operand 113 states and 270 transitions. Second operand 14 states. [2019-12-27 19:04:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:39,308 INFO L93 Difference]: Finished difference Result 251 states and 566 transitions. [2019-12-27 19:04:39,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:04:39,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:39,311 INFO L225 Difference]: With dead ends: 251 [2019-12-27 19:04:39,311 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 19:04:39,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:04:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 19:04:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 115. [2019-12-27 19:04:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:39,315 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:39,316 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:39,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:39,316 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:39,317 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:39,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:39,520 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -34951741, now seen corresponding path program 87 times [2019-12-27 19:04:39,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:39,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458412333] [2019-12-27 19:04:39,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:39,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458412333] [2019-12-27 19:04:39,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227605525] [2019-12-27 19:04:39,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:39,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:04:39,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:39,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:39,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:04:39,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:39,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:39,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [60137577] [2019-12-27 19:04:39,680 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:39,682 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:39,684 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 19:04:39,684 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:39,685 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:04:39,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:39,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:39,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:39,686 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 19:04:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:39,847 INFO L93 Difference]: Finished difference Result 257 states and 585 transitions. [2019-12-27 19:04:39,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:39,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:39,849 INFO L225 Difference]: With dead ends: 257 [2019-12-27 19:04:39,850 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 19:04:39,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 19:04:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 115. [2019-12-27 19:04:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:39,853 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:39,853 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:39,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:39,854 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:39,854 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:40,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:40,055 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 883387389, now seen corresponding path program 88 times [2019-12-27 19:04:40,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:40,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001346490] [2019-12-27 19:04:40,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:40,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001346490] [2019-12-27 19:04:40,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104235334] [2019-12-27 19:04:40,115 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:40,176 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:40,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:40,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:40,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:04:40,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:40,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:40,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [835898743] [2019-12-27 19:04:40,193 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:40,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:40,196 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 19:04:40,196 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:40,198 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:04:40,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:40,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:40,198 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 19:04:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:40,373 INFO L93 Difference]: Finished difference Result 267 states and 612 transitions. [2019-12-27 19:04:40,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:40,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:40,376 INFO L225 Difference]: With dead ends: 267 [2019-12-27 19:04:40,376 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 19:04:40,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 19:04:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 115. [2019-12-27 19:04:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:40,380 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:40,380 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:40,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:40,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:40,381 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:40,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:40,584 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:40,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1671515242, now seen corresponding path program 89 times [2019-12-27 19:04:40,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:40,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180607749] [2019-12-27 19:04:40,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:40,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180607749] [2019-12-27 19:04:40,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226971681] [2019-12-27 19:04:40,650 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:40,708 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:40,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:40,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:04:40,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:40,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:40,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:04:40,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [958273191] [2019-12-27 19:04:40,718 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:40,719 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:40,721 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 19:04:40,721 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:40,779 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:04:40,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:40,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:40,780 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 14 states. [2019-12-27 19:04:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:41,120 INFO L93 Difference]: Finished difference Result 302 states and 680 transitions. [2019-12-27 19:04:41,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:41,120 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:41,122 INFO L225 Difference]: With dead ends: 302 [2019-12-27 19:04:41,122 INFO L226 Difference]: Without dead ends: 300 [2019-12-27 19:04:41,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-27 19:04:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 117. [2019-12-27 19:04:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2019-12-27 19:04:41,126 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 17 [2019-12-27 19:04:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:41,126 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2019-12-27 19:04:41,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2019-12-27 19:04:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:41,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:41,127 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:41,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:41,332 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:41,332 INFO L82 PathProgramCache]: Analyzing trace with hash -712870653, now seen corresponding path program 90 times [2019-12-27 19:04:41,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:41,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103093489] [2019-12-27 19:04:41,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:41,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103093489] [2019-12-27 19:04:41,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218381557] [2019-12-27 19:04:41,397 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:41,460 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:04:41,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:41,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:41,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 19:04:41,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:41,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:41,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875361019] [2019-12-27 19:04:41,479 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:41,481 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:41,483 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 19:04:41,483 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:41,492 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:41,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:41,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:41,493 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 12 states. [2019-12-27 19:04:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:41,658 INFO L93 Difference]: Finished difference Result 273 states and 623 transitions. [2019-12-27 19:04:41,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:41,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:41,660 INFO L225 Difference]: With dead ends: 273 [2019-12-27 19:04:41,660 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 19:04:41,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 19:04:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 117. [2019-12-27 19:04:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2019-12-27 19:04:41,664 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 17 [2019-12-27 19:04:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:41,664 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2019-12-27 19:04:41,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2019-12-27 19:04:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:41,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:41,665 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:41,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:41,865 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:41,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:41,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2113915114, now seen corresponding path program 91 times [2019-12-27 19:04:41,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:41,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761624452] [2019-12-27 19:04:41,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:41,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761624452] [2019-12-27 19:04:41,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580834798] [2019-12-27 19:04:41,931 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:41,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:41,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:04:42,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:42,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:42,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [840098680] [2019-12-27 19:04:42,018 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:42,019 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:42,020 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:42,020 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:42,021 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:42,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:42,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:42,022 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 12 states. [2019-12-27 19:04:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:42,233 INFO L93 Difference]: Finished difference Result 295 states and 665 transitions. [2019-12-27 19:04:42,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:04:42,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:42,235 INFO L225 Difference]: With dead ends: 295 [2019-12-27 19:04:42,235 INFO L226 Difference]: Without dead ends: 293 [2019-12-27 19:04:42,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:04:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-12-27 19:04:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 115. [2019-12-27 19:04:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:42,240 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:42,240 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:42,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:42,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:42,241 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:42,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:42,444 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash 384093008, now seen corresponding path program 92 times [2019-12-27 19:04:42,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:42,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233247424] [2019-12-27 19:04:42,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:42,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233247424] [2019-12-27 19:04:42,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123312260] [2019-12-27 19:04:42,503 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:42,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:42,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:42,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:04:42,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:42,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:42,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 19:04:42,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [289020687] [2019-12-27 19:04:42,615 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:42,616 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:42,618 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:42,619 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:42,663 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:04:42,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:42,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:42,664 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 14 states. [2019-12-27 19:04:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:42,980 INFO L93 Difference]: Finished difference Result 297 states and 672 transitions. [2019-12-27 19:04:42,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:04:42,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:42,982 INFO L225 Difference]: With dead ends: 297 [2019-12-27 19:04:42,982 INFO L226 Difference]: Without dead ends: 295 [2019-12-27 19:04:42,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:04:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-12-27 19:04:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 116. [2019-12-27 19:04:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:42,987 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:42,987 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:42,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:42,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:42,988 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:43,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:43,192 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:43,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1342737597, now seen corresponding path program 93 times [2019-12-27 19:04:43,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:43,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190480893] [2019-12-27 19:04:43,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:43,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190480893] [2019-12-27 19:04:43,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298911376] [2019-12-27 19:04:43,255 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:43,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:04:43,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:43,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:43,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:04:43,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:43,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:43,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1164699181] [2019-12-27 19:04:43,340 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:43,342 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:43,344 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 19:04:43,344 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:43,345 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:43,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:43,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:43,345 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 19:04:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:43,510 INFO L93 Difference]: Finished difference Result 266 states and 613 transitions. [2019-12-27 19:04:43,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:43,511 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:43,512 INFO L225 Difference]: With dead ends: 266 [2019-12-27 19:04:43,512 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 19:04:43,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 19:04:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 116. [2019-12-27 19:04:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:43,516 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:43,517 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:43,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:43,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:43,518 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:43,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:43,721 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:43,722 INFO L82 PathProgramCache]: Analyzing trace with hash -58306864, now seen corresponding path program 94 times [2019-12-27 19:04:43,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:43,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288391940] [2019-12-27 19:04:43,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:43,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288391940] [2019-12-27 19:04:43,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437822549] [2019-12-27 19:04:43,809 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:43,912 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:43,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:43,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:43,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:43,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:43,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:43,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [473537294] [2019-12-27 19:04:43,971 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:43,974 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:43,976 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:43,977 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:43,978 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:43,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:43,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:43,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:43,979 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 19:04:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:44,271 INFO L93 Difference]: Finished difference Result 298 states and 684 transitions. [2019-12-27 19:04:44,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:44,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:44,273 INFO L225 Difference]: With dead ends: 298 [2019-12-27 19:04:44,273 INFO L226 Difference]: Without dead ends: 296 [2019-12-27 19:04:44,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-27 19:04:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 115. [2019-12-27 19:04:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:44,277 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:44,277 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:44,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:44,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:44,278 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:44,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:44,482 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:44,482 INFO L82 PathProgramCache]: Analyzing trace with hash 860032266, now seen corresponding path program 95 times [2019-12-27 19:04:44,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:44,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626715437] [2019-12-27 19:04:44,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:44,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626715437] [2019-12-27 19:04:44,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806073869] [2019-12-27 19:04:44,599 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:44,704 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:04:44,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:44,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:44,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:44,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:44,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:44,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1868243383] [2019-12-27 19:04:44,755 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:44,757 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:44,760 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:44,761 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:44,762 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:44,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:44,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:44,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:44,763 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 19:04:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:45,054 INFO L93 Difference]: Finished difference Result 292 states and 666 transitions. [2019-12-27 19:04:45,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:04:45,055 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:45,056 INFO L225 Difference]: With dead ends: 292 [2019-12-27 19:04:45,056 INFO L226 Difference]: Without dead ends: 290 [2019-12-27 19:04:45,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:04:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-12-27 19:04:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 111. [2019-12-27 19:04:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:04:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 262 transitions. [2019-12-27 19:04:45,060 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 262 transitions. Word has length 17 [2019-12-27 19:04:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:45,060 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 262 transitions. [2019-12-27 19:04:45,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 262 transitions. [2019-12-27 19:04:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:45,061 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:45,061 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:45,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:45,265 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:45,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1843957929, now seen corresponding path program 96 times [2019-12-27 19:04:45,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:45,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338911814] [2019-12-27 19:04:45,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:45,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338911814] [2019-12-27 19:04:45,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498319085] [2019-12-27 19:04:45,329 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:45,393 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:04:45,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:45,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:45,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:45,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:45,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:45,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [294141792] [2019-12-27 19:04:45,431 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:45,432 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:45,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 19:04:45,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:45,493 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:04:45,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:04:45,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:04:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:45,494 INFO L87 Difference]: Start difference. First operand 111 states and 262 transitions. Second operand 16 states. [2019-12-27 19:04:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:45,958 INFO L93 Difference]: Finished difference Result 344 states and 765 transitions. [2019-12-27 19:04:45,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:04:45,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 19:04:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:45,960 INFO L225 Difference]: With dead ends: 344 [2019-12-27 19:04:45,960 INFO L226 Difference]: Without dead ends: 342 [2019-12-27 19:04:45,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1154, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:04:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-12-27 19:04:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 116. [2019-12-27 19:04:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:45,964 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:45,964 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:45,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:04:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:45,965 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:45,965 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:46,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:46,165 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash -316560682, now seen corresponding path program 97 times [2019-12-27 19:04:46,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:46,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676069772] [2019-12-27 19:04:46,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:46,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676069772] [2019-12-27 19:04:46,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763071739] [2019-12-27 19:04:46,241 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:46,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:04:46,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:46,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:46,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 19:04:46,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1545106005] [2019-12-27 19:04:46,359 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:46,359 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:46,361 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:46,361 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:46,394 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:46,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:46,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:46,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:46,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:46,396 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 14 states. [2019-12-27 19:04:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:46,696 INFO L93 Difference]: Finished difference Result 306 states and 686 transitions. [2019-12-27 19:04:46,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:04:46,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:46,698 INFO L225 Difference]: With dead ends: 306 [2019-12-27 19:04:46,698 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 19:04:46,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:04:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 19:04:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 117. [2019-12-27 19:04:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 19:04:46,703 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 19:04:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:46,703 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 19:04:46,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 19:04:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:46,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:46,704 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:46,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:46,907 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 642083907, now seen corresponding path program 98 times [2019-12-27 19:04:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:46,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885565699] [2019-12-27 19:04:46,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:47,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885565699] [2019-12-27 19:04:47,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897433372] [2019-12-27 19:04:47,001 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:47,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:47,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:47,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:47,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:04:47,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:47,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:47,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1397582915] [2019-12-27 19:04:47,107 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:47,109 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:47,110 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 19:04:47,111 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:47,111 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:47,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:47,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:47,112 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 19:04:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:47,266 INFO L93 Difference]: Finished difference Result 273 states and 622 transitions. [2019-12-27 19:04:47,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:47,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:47,268 INFO L225 Difference]: With dead ends: 273 [2019-12-27 19:04:47,268 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 19:04:47,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 19:04:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 117. [2019-12-27 19:04:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 19:04:47,272 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 19:04:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:47,272 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 19:04:47,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 19:04:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:47,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:47,273 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:47,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:47,474 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash -758960554, now seen corresponding path program 99 times [2019-12-27 19:04:47,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:47,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700777100] [2019-12-27 19:04:47,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:47,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700777100] [2019-12-27 19:04:47,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016786594] [2019-12-27 19:04:47,549 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:47,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:04:47,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:47,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:47,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:47,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:47,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:47,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1298340033] [2019-12-27 19:04:47,640 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:47,642 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:47,643 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:47,643 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:47,644 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:47,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:47,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:47,644 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 19:04:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:47,859 INFO L93 Difference]: Finished difference Result 303 states and 687 transitions. [2019-12-27 19:04:47,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:04:47,859 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:47,860 INFO L225 Difference]: With dead ends: 303 [2019-12-27 19:04:47,860 INFO L226 Difference]: Without dead ends: 301 [2019-12-27 19:04:47,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:04:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-27 19:04:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 116. [2019-12-27 19:04:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:47,865 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:47,865 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:47,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:47,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:47,866 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:48,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:48,066 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:48,067 INFO L82 PathProgramCache]: Analyzing trace with hash 159378576, now seen corresponding path program 100 times [2019-12-27 19:04:48,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:48,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206369675] [2019-12-27 19:04:48,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:48,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206369675] [2019-12-27 19:04:48,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969754645] [2019-12-27 19:04:48,172 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:48,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:48,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:48,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:48,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:48,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:48,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:48,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1308631481] [2019-12-27 19:04:48,317 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:48,318 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:48,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:48,320 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:48,320 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:48,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:48,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:48,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:48,321 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 19:04:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:48,669 INFO L93 Difference]: Finished difference Result 306 states and 695 transitions. [2019-12-27 19:04:48,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:04:48,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:48,670 INFO L225 Difference]: With dead ends: 306 [2019-12-27 19:04:48,670 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 19:04:48,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:04:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 19:04:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 113. [2019-12-27 19:04:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:04:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 269 transitions. [2019-12-27 19:04:48,675 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 269 transitions. Word has length 17 [2019-12-27 19:04:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:48,676 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 269 transitions. [2019-12-27 19:04:48,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 269 transitions. [2019-12-27 19:04:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:48,677 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:48,677 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:48,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:48,882 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1899443241, now seen corresponding path program 101 times [2019-12-27 19:04:48,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:48,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330274858] [2019-12-27 19:04:48,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:48,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330274858] [2019-12-27 19:04:48,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919970513] [2019-12-27 19:04:48,960 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:49,015 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:49,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:49,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:04:49,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:49,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:49,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:04:49,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [430574542] [2019-12-27 19:04:49,026 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:49,027 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:49,028 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:49,029 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:49,060 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:04:49,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:49,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:49,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:49,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:49,061 INFO L87 Difference]: Start difference. First operand 113 states and 269 transitions. Second operand 14 states. [2019-12-27 19:04:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:49,453 INFO L93 Difference]: Finished difference Result 333 states and 746 transitions. [2019-12-27 19:04:49,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:04:49,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:49,455 INFO L225 Difference]: With dead ends: 333 [2019-12-27 19:04:49,455 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 19:04:49,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:04:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 19:04:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 116. [2019-12-27 19:04:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:49,467 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:49,468 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:49,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:49,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:49,469 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:49,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:49,674 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1436879466, now seen corresponding path program 102 times [2019-12-27 19:04:49,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:49,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659394706] [2019-12-27 19:04:49,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:49,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659394706] [2019-12-27 19:04:49,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010423374] [2019-12-27 19:04:49,782 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:49,890 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:49,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:49,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:49,893 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:04:49,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:49,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:49,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [909606071] [2019-12-27 19:04:49,943 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:49,946 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:49,948 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:49,949 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:49,959 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:49,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:49,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:49,960 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 19:04:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:50,224 INFO L93 Difference]: Finished difference Result 308 states and 694 transitions. [2019-12-27 19:04:50,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:04:50,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:50,225 INFO L225 Difference]: With dead ends: 308 [2019-12-27 19:04:50,225 INFO L226 Difference]: Without dead ends: 306 [2019-12-27 19:04:50,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:04:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-12-27 19:04:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 115. [2019-12-27 19:04:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:50,229 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:50,231 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:50,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:50,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:50,232 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:50,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:50,436 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1457043369, now seen corresponding path program 103 times [2019-12-27 19:04:50,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:50,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428483017] [2019-12-27 19:04:50,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:50,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428483017] [2019-12-27 19:04:50,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162261536] [2019-12-27 19:04:50,495 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:50,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:50,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:04:50,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:50,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:50,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1577437389] [2019-12-27 19:04:50,587 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:50,588 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:50,589 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:50,589 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:50,590 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:04:50,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:50,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:50,591 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 19:04:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:50,824 INFO L93 Difference]: Finished difference Result 331 states and 743 transitions. [2019-12-27 19:04:50,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:50,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:50,826 INFO L225 Difference]: With dead ends: 331 [2019-12-27 19:04:50,826 INFO L226 Difference]: Without dead ends: 329 [2019-12-27 19:04:50,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:04:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-27 19:04:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 111. [2019-12-27 19:04:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:04:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 262 transitions. [2019-12-27 19:04:50,830 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 262 transitions. Word has length 17 [2019-12-27 19:04:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:50,830 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 262 transitions. [2019-12-27 19:04:50,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 262 transitions. [2019-12-27 19:04:50,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:50,830 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:50,830 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:51,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:51,031 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:51,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1598530019, now seen corresponding path program 104 times [2019-12-27 19:04:51,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:51,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379915587] [2019-12-27 19:04:51,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:51,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379915587] [2019-12-27 19:04:51,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827397744] [2019-12-27 19:04:51,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:51,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:51,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:51,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:51,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:51,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:51,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:51,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2122511841] [2019-12-27 19:04:51,188 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:51,189 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:51,190 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:51,190 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:51,244 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:04:51,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:04:51,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:04:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:04:51,245 INFO L87 Difference]: Start difference. First operand 111 states and 262 transitions. Second operand 16 states. [2019-12-27 19:04:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:51,715 INFO L93 Difference]: Finished difference Result 346 states and 770 transitions. [2019-12-27 19:04:51,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:04:51,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 19:04:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:51,716 INFO L225 Difference]: With dead ends: 346 [2019-12-27 19:04:51,717 INFO L226 Difference]: Without dead ends: 344 [2019-12-27 19:04:51,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=1207, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:04:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-12-27 19:04:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 117. [2019-12-27 19:04:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 19:04:51,720 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 19:04:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:51,721 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 19:04:51,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:04:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 19:04:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:51,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:51,721 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:51,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:51,922 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -561988592, now seen corresponding path program 105 times [2019-12-27 19:04:51,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:51,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463854434] [2019-12-27 19:04:51,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:51,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463854434] [2019-12-27 19:04:52,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348278902] [2019-12-27 19:04:52,000 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:52,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:04:52,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:52,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:52,058 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:04:52,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:52,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:52,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1108049700] [2019-12-27 19:04:52,081 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:52,083 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:52,084 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:52,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:52,110 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:52,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:52,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:04:52,111 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 14 states. [2019-12-27 19:04:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:52,420 INFO L93 Difference]: Finished difference Result 307 states and 692 transitions. [2019-12-27 19:04:52,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:04:52,420 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:52,422 INFO L225 Difference]: With dead ends: 307 [2019-12-27 19:04:52,422 INFO L226 Difference]: Without dead ends: 305 [2019-12-27 19:04:52,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:04:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-12-27 19:04:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 118. [2019-12-27 19:04:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 19:04:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 288 transitions. [2019-12-27 19:04:52,426 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 288 transitions. Word has length 17 [2019-12-27 19:04:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:52,427 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 288 transitions. [2019-12-27 19:04:52,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 288 transitions. [2019-12-27 19:04:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:52,427 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:52,428 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:52,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:52,638 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash 396655997, now seen corresponding path program 106 times [2019-12-27 19:04:52,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:52,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414828547] [2019-12-27 19:04:52,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:52,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414828547] [2019-12-27 19:04:52,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005716287] [2019-12-27 19:04:52,697 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:52,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:52,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:52,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:04:52,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:04:52,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:52,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 19:04:52,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536904082] [2019-12-27 19:04:52,775 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:52,776 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:52,778 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 19:04:52,778 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:52,778 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:52,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:52,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:04:52,779 INFO L87 Difference]: Start difference. First operand 118 states and 288 transitions. Second operand 12 states. [2019-12-27 19:04:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:52,941 INFO L93 Difference]: Finished difference Result 267 states and 608 transitions. [2019-12-27 19:04:52,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:04:52,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:52,942 INFO L225 Difference]: With dead ends: 267 [2019-12-27 19:04:52,943 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 19:04:52,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:04:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 19:04:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 118. [2019-12-27 19:04:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 19:04:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 288 transitions. [2019-12-27 19:04:52,946 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 288 transitions. Word has length 17 [2019-12-27 19:04:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:52,947 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 288 transitions. [2019-12-27 19:04:52,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 288 transitions. [2019-12-27 19:04:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:52,947 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:52,947 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:53,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:53,151 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1004388464, now seen corresponding path program 107 times [2019-12-27 19:04:53,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:53,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452744861] [2019-12-27 19:04:53,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:53,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452744861] [2019-12-27 19:04:53,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657091755] [2019-12-27 19:04:53,222 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:53,288 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:53,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:53,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:53,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:53,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:53,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:53,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1669114766] [2019-12-27 19:04:53,354 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:53,357 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:53,359 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 19:04:53,360 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:53,360 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:53,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:53,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:53,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:53,361 INFO L87 Difference]: Start difference. First operand 118 states and 288 transitions. Second operand 12 states. [2019-12-27 19:04:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:53,677 INFO L93 Difference]: Finished difference Result 308 states and 696 transitions. [2019-12-27 19:04:53,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:53,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:53,679 INFO L225 Difference]: With dead ends: 308 [2019-12-27 19:04:53,679 INFO L226 Difference]: Without dead ends: 306 [2019-12-27 19:04:53,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-12-27 19:04:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 117. [2019-12-27 19:04:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 19:04:53,686 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 19:04:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:53,686 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 19:04:53,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 19:04:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:53,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:53,687 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:53,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:53,890 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash -86049334, now seen corresponding path program 108 times [2019-12-27 19:04:53,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:53,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273791987] [2019-12-27 19:04:53,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:53,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273791987] [2019-12-27 19:04:53,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207378343] [2019-12-27 19:04:53,964 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:54,033 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:54,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:54,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:54,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:04:54,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:54,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:54,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1760399760] [2019-12-27 19:04:54,065 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:54,066 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:54,067 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:54,068 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:54,068 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:54,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:54,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:54,068 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 19:04:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:54,318 INFO L93 Difference]: Finished difference Result 313 states and 711 transitions. [2019-12-27 19:04:54,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:54,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:54,319 INFO L225 Difference]: With dead ends: 313 [2019-12-27 19:04:54,319 INFO L226 Difference]: Without dead ends: 311 [2019-12-27 19:04:54,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-27 19:04:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 114. [2019-12-27 19:04:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:04:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 273 transitions. [2019-12-27 19:04:54,323 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 273 transitions. Word has length 17 [2019-12-27 19:04:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:54,323 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 273 transitions. [2019-12-27 19:04:54,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 273 transitions. [2019-12-27 19:04:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:54,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:54,324 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:54,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:54,524 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1654015331, now seen corresponding path program 109 times [2019-12-27 19:04:54,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:54,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292703959] [2019-12-27 19:04:54,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:54,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292703959] [2019-12-27 19:04:54,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735762545] [2019-12-27 19:04:54,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:54,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:54,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:54,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:54,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:54,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1769652564] [2019-12-27 19:04:54,683 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:54,684 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:54,685 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:54,685 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:54,717 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:54,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:54,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:54,719 INFO L87 Difference]: Start difference. First operand 114 states and 273 transitions. Second operand 14 states. [2019-12-27 19:04:55,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:55,076 INFO L93 Difference]: Finished difference Result 330 states and 738 transitions. [2019-12-27 19:04:55,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:04:55,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:55,078 INFO L225 Difference]: With dead ends: 330 [2019-12-27 19:04:55,079 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 19:04:55,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=371, Invalid=889, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:04:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 19:04:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 117. [2019-12-27 19:04:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 19:04:55,083 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 19:04:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:55,083 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 19:04:55,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 19:04:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:55,084 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:55,084 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:55,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:55,287 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:55,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1682307376, now seen corresponding path program 110 times [2019-12-27 19:04:55,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:55,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251642858] [2019-12-27 19:04:55,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:55,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251642858] [2019-12-27 19:04:55,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320154970] [2019-12-27 19:04:55,376 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:55,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:55,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:55,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:55,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:04:55,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:55,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:55,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [490297933] [2019-12-27 19:04:55,474 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:55,475 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:55,477 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:04:55,478 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:55,478 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:55,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:55,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:55,478 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 19:04:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:55,720 INFO L93 Difference]: Finished difference Result 316 states and 716 transitions. [2019-12-27 19:04:55,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:55,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:55,722 INFO L225 Difference]: With dead ends: 316 [2019-12-27 19:04:55,722 INFO L226 Difference]: Without dead ends: 314 [2019-12-27 19:04:55,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-12-27 19:04:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 116. [2019-12-27 19:04:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:55,726 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:55,726 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:55,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:55,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:55,727 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:55,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:55,930 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1211615459, now seen corresponding path program 111 times [2019-12-27 19:04:55,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:55,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290971837] [2019-12-27 19:04:55,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:56,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290971837] [2019-12-27 19:04:56,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939480009] [2019-12-27 19:04:56,018 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:56,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:04:56,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:56,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:56,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:56,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:56,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:56,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [384173008] [2019-12-27 19:04:56,134 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:56,135 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:56,136 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 19:04:56,136 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:56,136 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:56,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:56,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:56,137 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 19:04:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:56,391 INFO L93 Difference]: Finished difference Result 336 states and 759 transitions. [2019-12-27 19:04:56,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:04:56,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:56,392 INFO L225 Difference]: With dead ends: 336 [2019-12-27 19:04:56,392 INFO L226 Difference]: Without dead ends: 334 [2019-12-27 19:04:56,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:04:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2019-12-27 19:04:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 113. [2019-12-27 19:04:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:04:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 269 transitions. [2019-12-27 19:04:56,396 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 269 transitions. Word has length 17 [2019-12-27 19:04:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:56,396 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 269 transitions. [2019-12-27 19:04:56,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 269 transitions. [2019-12-27 19:04:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:56,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:56,397 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:56,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:56,598 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -585343715, now seen corresponding path program 112 times [2019-12-27 19:04:56,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:56,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724982298] [2019-12-27 19:04:56,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:56,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724982298] [2019-12-27 19:04:56,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299225688] [2019-12-27 19:04:56,660 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:56,717 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:04:56,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:56,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:56,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:56,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:56,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:56,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366459962] [2019-12-27 19:04:56,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:56,753 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:56,754 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:56,754 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:56,795 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:04:56,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:04:56,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:56,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:04:56,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:56,796 INFO L87 Difference]: Start difference. First operand 113 states and 269 transitions. Second operand 14 states. [2019-12-27 19:04:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:57,164 INFO L93 Difference]: Finished difference Result 340 states and 751 transitions. [2019-12-27 19:04:57,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:04:57,164 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 19:04:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:57,166 INFO L225 Difference]: With dead ends: 340 [2019-12-27 19:04:57,166 INFO L226 Difference]: Without dead ends: 338 [2019-12-27 19:04:57,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:04:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-12-27 19:04:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 117. [2019-12-27 19:04:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:04:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 19:04:57,169 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 19:04:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:57,169 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 19:04:57,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:04:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 19:04:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:57,170 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:57,170 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:57,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:57,371 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:57,371 INFO L82 PathProgramCache]: Analyzing trace with hash 373300874, now seen corresponding path program 113 times [2019-12-27 19:04:57,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:57,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246870953] [2019-12-27 19:04:57,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:57,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246870953] [2019-12-27 19:04:57,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864972545] [2019-12-27 19:04:57,436 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:57,494 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:04:57,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:57,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:04:57,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:04:57,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:57,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 19:04:57,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [949909114] [2019-12-27 19:04:57,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:57,528 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:57,530 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 19:04:57,530 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:57,530 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:57,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:57,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:57,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:57,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:04:57,531 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 19:04:57,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:57,788 INFO L93 Difference]: Finished difference Result 310 states and 686 transitions. [2019-12-27 19:04:57,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:04:57,789 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:57,791 INFO L225 Difference]: With dead ends: 310 [2019-12-27 19:04:57,791 INFO L226 Difference]: Without dead ends: 308 [2019-12-27 19:04:57,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:04:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2019-12-27 19:04:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 116. [2019-12-27 19:04:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:04:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 19:04:57,795 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 19:04:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:57,796 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 19:04:57,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 19:04:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:57,796 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:57,797 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:58,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:58,000 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1027743587, now seen corresponding path program 114 times [2019-12-27 19:04:58,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:58,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706408292] [2019-12-27 19:04:58,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:58,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706408292] [2019-12-27 19:04:58,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013225314] [2019-12-27 19:04:58,085 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:58,146 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:04:58,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:58,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:58,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:04:58,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:58,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:58,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1545839445] [2019-12-27 19:04:58,177 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:58,179 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:58,180 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 19:04:58,180 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:58,180 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:58,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:58,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:58,181 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 19:04:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:58,456 INFO L93 Difference]: Finished difference Result 344 states and 763 transitions. [2019-12-27 19:04:58,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:04:58,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:58,457 INFO L225 Difference]: With dead ends: 344 [2019-12-27 19:04:58,457 INFO L226 Difference]: Without dead ends: 342 [2019-12-27 19:04:58,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:04:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-12-27 19:04:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 115. [2019-12-27 19:04:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:04:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 19:04:58,461 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 19:04:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:58,461 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 19:04:58,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 19:04:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:04:58,462 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:58,462 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:58,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:58,663 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash -109404457, now seen corresponding path program 115 times [2019-12-27 19:04:58,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:58,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572356025] [2019-12-27 19:04:58,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:58,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572356025] [2019-12-27 19:04:58,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940959878] [2019-12-27 19:04:58,728 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:58,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:04:58,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:58,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:58,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 19:04:58,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1501076587] [2019-12-27 19:04:58,820 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:58,821 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:58,823 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 19:04:58,823 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:58,823 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:04:58,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:04:58,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:04:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:04:58,824 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 19:04:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:59,110 INFO L93 Difference]: Finished difference Result 339 states and 741 transitions. [2019-12-27 19:04:59,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:04:59,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 19:04:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:59,112 INFO L225 Difference]: With dead ends: 339 [2019-12-27 19:04:59,112 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 19:04:59,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:04:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 19:04:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 107. [2019-12-27 19:04:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 19:04:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2019-12-27 19:04:59,115 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 17 [2019-12-27 19:04:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:59,115 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2019-12-27 19:04:59,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:04:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2019-12-27 19:04:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:04:59,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:59,116 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:04:59,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:59,317 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:04:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:04:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2055665343, now seen corresponding path program 116 times [2019-12-27 19:04:59,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:04:59,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997096791] [2019-12-27 19:04:59,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:04:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:04:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:04:59,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997096791] [2019-12-27 19:04:59,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007764679] [2019-12-27 19:04:59,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:04:59,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:04:59,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:04:59,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:04:59,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:04:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:04:59,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:04:59,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:04:59,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1781683715] [2019-12-27 19:04:59,497 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:04:59,498 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:04:59,500 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:04:59,500 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:04:59,500 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:04:59,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:04:59,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:04:59,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:04:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:04:59,501 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand 13 states. [2019-12-27 19:04:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:04:59,909 INFO L93 Difference]: Finished difference Result 415 states and 849 transitions. [2019-12-27 19:04:59,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:04:59,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:04:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:04:59,911 INFO L225 Difference]: With dead ends: 415 [2019-12-27 19:04:59,912 INFO L226 Difference]: Without dead ends: 409 [2019-12-27 19:04:59,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=1134, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:04:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2019-12-27 19:04:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 114. [2019-12-27 19:04:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:04:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 267 transitions. [2019-12-27 19:04:59,916 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 267 transitions. Word has length 18 [2019-12-27 19:04:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:04:59,916 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 267 transitions. [2019-12-27 19:04:59,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:04:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 267 transitions. [2019-12-27 19:04:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:04:59,917 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:04:59,917 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:00,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:00,120 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash -430286399, now seen corresponding path program 117 times [2019-12-27 19:05:00,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:00,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393213529] [2019-12-27 19:05:00,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:00,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393213529] [2019-12-27 19:05:00,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020276299] [2019-12-27 19:05:00,189 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:00,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:05:00,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:00,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:00,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:05:00,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:00,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:00,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [420602465] [2019-12-27 19:05:00,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:00,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:00,303 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:00,303 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:00,330 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:00,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:00,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:00,331 INFO L87 Difference]: Start difference. First operand 114 states and 267 transitions. Second operand 15 states. [2019-12-27 19:05:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:00,804 INFO L93 Difference]: Finished difference Result 377 states and 800 transitions. [2019-12-27 19:05:00,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:05:00,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:00,806 INFO L225 Difference]: With dead ends: 377 [2019-12-27 19:05:00,807 INFO L226 Difference]: Without dead ends: 375 [2019-12-27 19:05:00,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:05:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-12-27 19:05:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 118. [2019-12-27 19:05:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 19:05:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 280 transitions. [2019-12-27 19:05:00,811 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 280 transitions. Word has length 18 [2019-12-27 19:05:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:00,812 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 280 transitions. [2019-12-27 19:05:00,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 280 transitions. [2019-12-27 19:05:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:00,812 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:00,812 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:01,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:01,016 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash 528358190, now seen corresponding path program 118 times [2019-12-27 19:05:01,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:01,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170802418] [2019-12-27 19:05:01,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:01,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170802418] [2019-12-27 19:05:01,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341544510] [2019-12-27 19:05:01,083 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:01,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:01,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:01,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:01,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:05:01,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:01,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:01,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1240834515] [2019-12-27 19:05:01,175 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:01,176 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:01,178 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:01,178 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:01,178 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:01,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:01,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:01,179 INFO L87 Difference]: Start difference. First operand 118 states and 280 transitions. Second operand 13 states. [2019-12-27 19:05:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:01,558 INFO L93 Difference]: Finished difference Result 353 states and 754 transitions. [2019-12-27 19:05:01,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:01,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:01,559 INFO L225 Difference]: With dead ends: 353 [2019-12-27 19:05:01,560 INFO L226 Difference]: Without dead ends: 351 [2019-12-27 19:05:01,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-12-27 19:05:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 117. [2019-12-27 19:05:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:05:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 276 transitions. [2019-12-27 19:05:01,563 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 276 transitions. Word has length 18 [2019-12-27 19:05:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:01,563 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 276 transitions. [2019-12-27 19:05:01,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 276 transitions. [2019-12-27 19:05:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:01,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:01,564 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:01,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:01,764 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -872686271, now seen corresponding path program 119 times [2019-12-27 19:05:01,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:01,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217639707] [2019-12-27 19:05:01,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:01,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217639707] [2019-12-27 19:05:01,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717550476] [2019-12-27 19:05:01,830 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:01,875 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:05:01,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:01,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:01,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:01,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:01,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:01,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [960940127] [2019-12-27 19:05:01,899 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:01,900 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:01,902 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 19:05:01,902 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:01,902 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:01,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:01,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:01,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:01,903 INFO L87 Difference]: Start difference. First operand 117 states and 276 transitions. Second operand 13 states. [2019-12-27 19:05:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:02,301 INFO L93 Difference]: Finished difference Result 372 states and 795 transitions. [2019-12-27 19:05:02,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:05:02,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:02,302 INFO L225 Difference]: With dead ends: 372 [2019-12-27 19:05:02,302 INFO L226 Difference]: Without dead ends: 370 [2019-12-27 19:05:02,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-12-27 19:05:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 112. [2019-12-27 19:05:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:05:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 260 transitions. [2019-12-27 19:05:02,306 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 260 transitions. Word has length 18 [2019-12-27 19:05:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:02,306 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 260 transitions. [2019-12-27 19:05:02,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 260 transitions. [2019-12-27 19:05:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:02,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:02,307 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:02,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:02,508 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1809216959, now seen corresponding path program 120 times [2019-12-27 19:05:02,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:02,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077611921] [2019-12-27 19:05:02,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:02,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077611921] [2019-12-27 19:05:02,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118253912] [2019-12-27 19:05:02,595 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:02,659 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:02,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:02,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:02,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:02,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:02,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:02,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636286308] [2019-12-27 19:05:02,690 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:02,691 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:02,693 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:02,693 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:02,751 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:02,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:02,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:02,752 INFO L87 Difference]: Start difference. First operand 112 states and 260 transitions. Second operand 17 states. [2019-12-27 19:05:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:03,342 INFO L93 Difference]: Finished difference Result 381 states and 824 transitions. [2019-12-27 19:05:03,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:05:03,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:03,343 INFO L225 Difference]: With dead ends: 381 [2019-12-27 19:05:03,343 INFO L226 Difference]: Without dead ends: 379 [2019-12-27 19:05:03,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=700, Invalid=1556, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:05:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-12-27 19:05:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 120. [2019-12-27 19:05:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 19:05:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 285 transitions. [2019-12-27 19:05:03,348 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 285 transitions. Word has length 18 [2019-12-27 19:05:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:03,348 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 285 transitions. [2019-12-27 19:05:03,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 285 transitions. [2019-12-27 19:05:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:03,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:03,349 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:03,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:03,552 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 325231726, now seen corresponding path program 121 times [2019-12-27 19:05:03,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:03,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789763564] [2019-12-27 19:05:03,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:03,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789763564] [2019-12-27 19:05:03,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679131615] [2019-12-27 19:05:03,628 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:03,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:03,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:05:03,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:03,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:03,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [685125919] [2019-12-27 19:05:03,743 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:03,744 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:03,746 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:03,746 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:03,785 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:03,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:03,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:03,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:03,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:03,786 INFO L87 Difference]: Start difference. First operand 120 states and 285 transitions. Second operand 15 states. [2019-12-27 19:05:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:04,241 INFO L93 Difference]: Finished difference Result 343 states and 750 transitions. [2019-12-27 19:05:04,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:05:04,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:04,242 INFO L225 Difference]: With dead ends: 343 [2019-12-27 19:05:04,242 INFO L226 Difference]: Without dead ends: 341 [2019-12-27 19:05:04,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:05:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-12-27 19:05:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 121. [2019-12-27 19:05:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 19:05:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-27 19:05:04,245 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 18 [2019-12-27 19:05:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:04,245 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-27 19:05:04,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-27 19:05:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:04,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:04,246 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:04,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:04,446 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1283876315, now seen corresponding path program 122 times [2019-12-27 19:05:04,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:04,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157525413] [2019-12-27 19:05:04,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:04,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157525413] [2019-12-27 19:05:04,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339649703] [2019-12-27 19:05:04,528 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:04,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:04,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:04,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:04,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:05:04,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:04,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:04,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [684478149] [2019-12-27 19:05:04,619 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:04,621 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:04,623 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:04,623 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:04,623 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:04,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:04,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:04,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:04,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:04,624 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 13 states. [2019-12-27 19:05:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:04,940 INFO L93 Difference]: Finished difference Result 307 states and 678 transitions. [2019-12-27 19:05:04,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:04,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:04,941 INFO L225 Difference]: With dead ends: 307 [2019-12-27 19:05:04,942 INFO L226 Difference]: Without dead ends: 305 [2019-12-27 19:05:04,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:05:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-12-27 19:05:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 121. [2019-12-27 19:05:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 19:05:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-27 19:05:04,945 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 18 [2019-12-27 19:05:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:04,946 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-27 19:05:04,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-27 19:05:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:04,946 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:04,946 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:05,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:05,148 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash -117168146, now seen corresponding path program 123 times [2019-12-27 19:05:05,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:05,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833624064] [2019-12-27 19:05:05,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:05,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833624064] [2019-12-27 19:05:05,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747731049] [2019-12-27 19:05:05,227 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:05,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:05:05,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:05,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:05,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:05,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:05,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:05,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1559907329] [2019-12-27 19:05:05,326 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:05,327 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:05,329 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:05,329 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:05,330 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:05,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:05,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:05,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:05,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:05,330 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 13 states. [2019-12-27 19:05:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:05,699 INFO L93 Difference]: Finished difference Result 339 states and 750 transitions. [2019-12-27 19:05:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:05,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:05,700 INFO L225 Difference]: With dead ends: 339 [2019-12-27 19:05:05,700 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 19:05:05,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 19:05:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 120. [2019-12-27 19:05:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 19:05:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 285 transitions. [2019-12-27 19:05:05,703 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 285 transitions. Word has length 18 [2019-12-27 19:05:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:05,703 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 285 transitions. [2019-12-27 19:05:05,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 285 transitions. [2019-12-27 19:05:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:05,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:05,704 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:05,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:05,905 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:05,905 INFO L82 PathProgramCache]: Analyzing trace with hash 801170984, now seen corresponding path program 124 times [2019-12-27 19:05:05,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:05,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874407193] [2019-12-27 19:05:05,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:05,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874407193] [2019-12-27 19:05:05,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573514899] [2019-12-27 19:05:05,974 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:06,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:06,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:06,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:06,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:06,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:06,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:06,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1455492575] [2019-12-27 19:05:06,075 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:06,077 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:06,079 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:06,079 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:06,079 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:06,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:06,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:06,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:06,080 INFO L87 Difference]: Start difference. First operand 120 states and 285 transitions. Second operand 13 states. [2019-12-27 19:05:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:06,475 INFO L93 Difference]: Finished difference Result 337 states and 742 transitions. [2019-12-27 19:05:06,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:06,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:06,476 INFO L225 Difference]: With dead ends: 337 [2019-12-27 19:05:06,476 INFO L226 Difference]: Without dead ends: 335 [2019-12-27 19:05:06,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-12-27 19:05:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 117. [2019-12-27 19:05:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:05:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 274 transitions. [2019-12-27 19:05:06,481 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 274 transitions. Word has length 18 [2019-12-27 19:05:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:06,481 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 274 transitions. [2019-12-27 19:05:06,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 274 transitions. [2019-12-27 19:05:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:06,481 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:06,481 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:06,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:06,682 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1753731647, now seen corresponding path program 125 times [2019-12-27 19:05:06,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:06,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478731248] [2019-12-27 19:05:06,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:06,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478731248] [2019-12-27 19:05:06,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327551437] [2019-12-27 19:05:06,753 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:06,803 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:06,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:06,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:06,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:05:06,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:06,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:06,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1442700470] [2019-12-27 19:05:06,832 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:06,833 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:06,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:06,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:06,862 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:06,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:06,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:06,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:06,863 INFO L87 Difference]: Start difference. First operand 117 states and 274 transitions. Second operand 15 states. [2019-12-27 19:05:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:07,327 INFO L93 Difference]: Finished difference Result 353 states and 767 transitions. [2019-12-27 19:05:07,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:05:07,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:07,328 INFO L225 Difference]: With dead ends: 353 [2019-12-27 19:05:07,328 INFO L226 Difference]: Without dead ends: 351 [2019-12-27 19:05:07,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:05:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-12-27 19:05:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 120. [2019-12-27 19:05:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 19:05:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 285 transitions. [2019-12-27 19:05:07,332 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 285 transitions. Word has length 18 [2019-12-27 19:05:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:07,332 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 285 transitions. [2019-12-27 19:05:07,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 285 transitions. [2019-12-27 19:05:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:07,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:07,333 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:07,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:07,536 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash -795087058, now seen corresponding path program 126 times [2019-12-27 19:05:07,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:07,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076873918] [2019-12-27 19:05:07,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:07,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076873918] [2019-12-27 19:05:07,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009054239] [2019-12-27 19:05:07,605 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:07,674 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:07,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:07,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:07,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:07,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:07,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:07,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578835660] [2019-12-27 19:05:07,712 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:07,713 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:07,715 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 19:05:07,715 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:07,715 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:07,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:07,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:07,716 INFO L87 Difference]: Start difference. First operand 120 states and 285 transitions. Second operand 13 states. [2019-12-27 19:05:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:08,113 INFO L93 Difference]: Finished difference Result 338 states and 740 transitions. [2019-12-27 19:05:08,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:08,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:08,114 INFO L225 Difference]: With dead ends: 338 [2019-12-27 19:05:08,115 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 19:05:08,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 19:05:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 119. [2019-12-27 19:05:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 19:05:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 281 transitions. [2019-12-27 19:05:08,119 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 281 transitions. Word has length 18 [2019-12-27 19:05:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:08,119 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 281 transitions. [2019-12-27 19:05:08,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 281 transitions. [2019-12-27 19:05:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:08,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:08,120 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:08,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:08,322 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:08,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2098835777, now seen corresponding path program 127 times [2019-12-27 19:05:08,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:08,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137502452] [2019-12-27 19:05:08,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:08,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137502452] [2019-12-27 19:05:08,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720737342] [2019-12-27 19:05:08,396 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:08,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:08,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:08,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:08,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:08,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1620303988] [2019-12-27 19:05:08,501 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:08,503 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:08,505 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:08,505 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:08,505 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:08,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:08,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:08,506 INFO L87 Difference]: Start difference. First operand 119 states and 281 transitions. Second operand 13 states. [2019-12-27 19:05:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:08,885 INFO L93 Difference]: Finished difference Result 354 states and 772 transitions. [2019-12-27 19:05:08,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:08,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:08,886 INFO L225 Difference]: With dead ends: 354 [2019-12-27 19:05:08,886 INFO L226 Difference]: Without dead ends: 352 [2019-12-27 19:05:08,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1075, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:05:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-12-27 19:05:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 110. [2019-12-27 19:05:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-27 19:05:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 253 transitions. [2019-12-27 19:05:08,890 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 253 transitions. Word has length 18 [2019-12-27 19:05:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:08,891 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 253 transitions. [2019-12-27 19:05:08,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 253 transitions. [2019-12-27 19:05:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:08,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:08,891 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:09,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:09,092 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash 183409345, now seen corresponding path program 128 times [2019-12-27 19:05:09,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:09,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461555923] [2019-12-27 19:05:09,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:09,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461555923] [2019-12-27 19:05:09,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815970205] [2019-12-27 19:05:09,158 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:09,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:09,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:09,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:09,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:09,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:09,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:09,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [142012575] [2019-12-27 19:05:09,275 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:09,276 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:09,279 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:09,279 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:09,381 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:05:09,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:05:09,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:09,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:05:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:09,382 INFO L87 Difference]: Start difference. First operand 110 states and 253 transitions. Second operand 19 states. [2019-12-27 19:05:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:10,186 INFO L93 Difference]: Finished difference Result 391 states and 852 transitions. [2019-12-27 19:05:10,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 19:05:10,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-27 19:05:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:10,188 INFO L225 Difference]: With dead ends: 391 [2019-12-27 19:05:10,188 INFO L226 Difference]: Without dead ends: 389 [2019-12-27 19:05:10,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=895, Invalid=2075, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 19:05:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-12-27 19:05:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 122. [2019-12-27 19:05:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-27 19:05:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 290 transitions. [2019-12-27 19:05:10,193 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 290 transitions. Word has length 18 [2019-12-27 19:05:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:10,193 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 290 transitions. [2019-12-27 19:05:10,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:05:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 290 transitions. [2019-12-27 19:05:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:10,193 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:10,194 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:10,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:10,398 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1605771858, now seen corresponding path program 129 times [2019-12-27 19:05:10,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:10,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111387077] [2019-12-27 19:05:10,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:10,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111387077] [2019-12-27 19:05:10,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475071470] [2019-12-27 19:05:10,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:10,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:05:10,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:10,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:10,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:05:10,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:10,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:10,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [77657418] [2019-12-27 19:05:10,599 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:10,601 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:10,603 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:10,603 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:10,660 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:10,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:10,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:05:10,661 INFO L87 Difference]: Start difference. First operand 122 states and 290 transitions. Second operand 17 states. [2019-12-27 19:05:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:11,186 INFO L93 Difference]: Finished difference Result 354 states and 779 transitions. [2019-12-27 19:05:11,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:05:11,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:11,187 INFO L225 Difference]: With dead ends: 354 [2019-12-27 19:05:11,187 INFO L226 Difference]: Without dead ends: 352 [2019-12-27 19:05:11,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=1470, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:05:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-12-27 19:05:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 123. [2019-12-27 19:05:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 19:05:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 294 transitions. [2019-12-27 19:05:11,192 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 294 transitions. Word has length 18 [2019-12-27 19:05:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:11,192 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 294 transitions. [2019-12-27 19:05:11,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 294 transitions. [2019-12-27 19:05:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:11,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:11,193 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:11,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:11,393 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:11,394 INFO L82 PathProgramCache]: Analyzing trace with hash 528676827, now seen corresponding path program 130 times [2019-12-27 19:05:11,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:11,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836024375] [2019-12-27 19:05:11,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:11,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836024375] [2019-12-27 19:05:11,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865884960] [2019-12-27 19:05:11,467 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:11,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:11,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:11,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:11,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:05:11,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:11,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:11,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [279005423] [2019-12-27 19:05:11,562 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:11,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:11,566 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:11,566 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:11,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:11,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:11,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:11,596 INFO L87 Difference]: Start difference. First operand 123 states and 294 transitions. Second operand 15 states. [2019-12-27 19:05:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:11,960 INFO L93 Difference]: Finished difference Result 313 states and 699 transitions. [2019-12-27 19:05:11,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:11,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:11,962 INFO L225 Difference]: With dead ends: 313 [2019-12-27 19:05:11,962 INFO L226 Difference]: Without dead ends: 311 [2019-12-27 19:05:11,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-27 19:05:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 125. [2019-12-27 19:05:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:05:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 19:05:11,965 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 18 [2019-12-27 19:05:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:11,966 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 19:05:11,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 19:05:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:11,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:11,966 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:12,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:12,170 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1487321416, now seen corresponding path program 131 times [2019-12-27 19:05:12,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:12,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044299659] [2019-12-27 19:05:12,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:12,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044299659] [2019-12-27 19:05:12,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399320843] [2019-12-27 19:05:12,245 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:12,294 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:05:12,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:12,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:05:12,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:12,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:12,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2019-12-27 19:05:12,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [228562750] [2019-12-27 19:05:12,433 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:12,434 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:12,437 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:12,437 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:12,437 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:12,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:12,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:12,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:12,438 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 13 states. [2019-12-27 19:05:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:12,690 INFO L93 Difference]: Finished difference Result 266 states and 600 transitions. [2019-12-27 19:05:12,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:12,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:12,691 INFO L225 Difference]: With dead ends: 266 [2019-12-27 19:05:12,692 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 19:05:12,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:05:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 19:05:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 126. [2019-12-27 19:05:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:05:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 19:05:12,695 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 18 [2019-12-27 19:05:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:12,696 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 19:05:12,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 19:05:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:12,696 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:12,696 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:12,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:12,897 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash 86276955, now seen corresponding path program 132 times [2019-12-27 19:05:12,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:12,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950127503] [2019-12-27 19:05:12,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:12,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950127503] [2019-12-27 19:05:12,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734949424] [2019-12-27 19:05:12,971 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:13,042 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:05:13,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:13,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:13,044 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:05:13,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:13,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:13,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [67349978] [2019-12-27 19:05:13,080 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:13,082 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:13,084 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:13,084 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:13,084 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:13,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:13,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:13,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:13,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:13,085 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 13 states. [2019-12-27 19:05:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:13,378 INFO L93 Difference]: Finished difference Result 321 states and 721 transitions. [2019-12-27 19:05:13,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:13,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:13,379 INFO L225 Difference]: With dead ends: 321 [2019-12-27 19:05:13,380 INFO L226 Difference]: Without dead ends: 319 [2019-12-27 19:05:13,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:05:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-12-27 19:05:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 125. [2019-12-27 19:05:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:05:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 19:05:13,384 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 18 [2019-12-27 19:05:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:13,384 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 19:05:13,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 19:05:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:13,384 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:13,384 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:13,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:13,585 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1004616085, now seen corresponding path program 133 times [2019-12-27 19:05:13,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:13,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698601525] [2019-12-27 19:05:13,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:13,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698601525] [2019-12-27 19:05:13,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67022761] [2019-12-27 19:05:13,655 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:13,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:13,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:13,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:13,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:13,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317994827] [2019-12-27 19:05:13,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:13,745 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:13,746 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:13,746 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:13,746 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:13,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:13,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:13,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:13,747 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 13 states. [2019-12-27 19:05:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:14,045 INFO L93 Difference]: Finished difference Result 323 states and 725 transitions. [2019-12-27 19:05:14,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:14,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:14,046 INFO L225 Difference]: With dead ends: 323 [2019-12-27 19:05:14,046 INFO L226 Difference]: Without dead ends: 321 [2019-12-27 19:05:14,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:05:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-27 19:05:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 124. [2019-12-27 19:05:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:05:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 19:05:14,050 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 19:05:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:14,050 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 19:05:14,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 19:05:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:14,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:14,050 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:14,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:14,251 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1550286546, now seen corresponding path program 134 times [2019-12-27 19:05:14,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:14,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979690122] [2019-12-27 19:05:14,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:14,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979690122] [2019-12-27 19:05:14,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183162459] [2019-12-27 19:05:14,322 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:14,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:14,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:14,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:14,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:14,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:14,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:14,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984677603] [2019-12-27 19:05:14,424 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:14,424 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:14,426 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:14,426 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:14,455 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:14,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:14,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:14,456 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 15 states. [2019-12-27 19:05:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:14,863 INFO L93 Difference]: Finished difference Result 349 states and 772 transitions. [2019-12-27 19:05:14,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:05:14,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:14,865 INFO L225 Difference]: With dead ends: 349 [2019-12-27 19:05:14,865 INFO L226 Difference]: Without dead ends: 347 [2019-12-27 19:05:14,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:05:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-12-27 19:05:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 126. [2019-12-27 19:05:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:05:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 302 transitions. [2019-12-27 19:05:14,869 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 302 transitions. Word has length 18 [2019-12-27 19:05:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:14,869 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 302 transitions. [2019-12-27 19:05:14,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 302 transitions. [2019-12-27 19:05:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:14,870 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:14,870 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:15,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:15,071 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash -591641957, now seen corresponding path program 135 times [2019-12-27 19:05:15,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:15,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481070553] [2019-12-27 19:05:15,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:15,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481070553] [2019-12-27 19:05:15,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718511973] [2019-12-27 19:05:15,149 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:15,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:05:15,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:15,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:15,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:15,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:15,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:15,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2064786321] [2019-12-27 19:05:15,241 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:15,242 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:15,244 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:15,244 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:15,244 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:15,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:15,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:15,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:15,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:15,245 INFO L87 Difference]: Start difference. First operand 126 states and 302 transitions. Second operand 13 states. [2019-12-27 19:05:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:15,545 INFO L93 Difference]: Finished difference Result 329 states and 736 transitions. [2019-12-27 19:05:15,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:15,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:15,546 INFO L225 Difference]: With dead ends: 329 [2019-12-27 19:05:15,546 INFO L226 Difference]: Without dead ends: 327 [2019-12-27 19:05:15,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:05:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-27 19:05:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 126. [2019-12-27 19:05:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:05:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 302 transitions. [2019-12-27 19:05:15,549 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 302 transitions. Word has length 18 [2019-12-27 19:05:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:15,549 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 302 transitions. [2019-12-27 19:05:15,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 302 transitions. [2019-12-27 19:05:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:15,550 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:15,550 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:15,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:15,750 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1992686418, now seen corresponding path program 136 times [2019-12-27 19:05:15,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:15,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149057698] [2019-12-27 19:05:15,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:15,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149057698] [2019-12-27 19:05:15,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065678793] [2019-12-27 19:05:15,823 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:15,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:15,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:15,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:15,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:15,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:15,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:15,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1381354434] [2019-12-27 19:05:15,917 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:15,918 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:15,920 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:15,920 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:15,921 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:15,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:15,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:15,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:15,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:15,921 INFO L87 Difference]: Start difference. First operand 126 states and 302 transitions. Second operand 13 states. [2019-12-27 19:05:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:16,249 INFO L93 Difference]: Finished difference Result 350 states and 781 transitions. [2019-12-27 19:05:16,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:05:16,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:16,251 INFO L225 Difference]: With dead ends: 350 [2019-12-27 19:05:16,251 INFO L226 Difference]: Without dead ends: 348 [2019-12-27 19:05:16,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=849, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:05:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-12-27 19:05:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 123. [2019-12-27 19:05:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 19:05:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-27 19:05:16,255 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 18 [2019-12-27 19:05:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:16,255 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-27 19:05:16,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-27 19:05:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:16,255 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:16,256 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:16,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:16,456 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash 505321704, now seen corresponding path program 137 times [2019-12-27 19:05:16,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:16,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452349458] [2019-12-27 19:05:16,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:16,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452349458] [2019-12-27 19:05:16,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703095643] [2019-12-27 19:05:16,526 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:16,571 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:05:16,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:16,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:16,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:16,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:16,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:16,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1278883236] [2019-12-27 19:05:16,624 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:16,625 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:16,627 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:16,628 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:16,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:16,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:16,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:16,669 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 15 states. [2019-12-27 19:05:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:17,170 INFO L93 Difference]: Finished difference Result 332 states and 733 transitions. [2019-12-27 19:05:17,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:05:17,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:17,171 INFO L225 Difference]: With dead ends: 332 [2019-12-27 19:05:17,171 INFO L226 Difference]: Without dead ends: 330 [2019-12-27 19:05:17,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:05:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-12-27 19:05:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 124. [2019-12-27 19:05:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:05:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 19:05:17,175 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 19:05:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:17,175 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 19:05:17,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 19:05:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:17,175 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:17,175 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:17,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:17,376 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:17,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1463966293, now seen corresponding path program 138 times [2019-12-27 19:05:17,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:17,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101318632] [2019-12-27 19:05:17,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:17,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101318632] [2019-12-27 19:05:17,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711865883] [2019-12-27 19:05:17,446 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:17,512 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:17,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:17,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:17,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:05:17,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:17,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:17,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1296689160] [2019-12-27 19:05:17,560 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:17,561 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:17,563 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:17,563 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:17,563 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:17,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:17,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:17,564 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 19:05:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:17,867 INFO L93 Difference]: Finished difference Result 312 states and 697 transitions. [2019-12-27 19:05:17,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:17,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:17,868 INFO L225 Difference]: With dead ends: 312 [2019-12-27 19:05:17,868 INFO L226 Difference]: Without dead ends: 310 [2019-12-27 19:05:17,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:05:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-12-27 19:05:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 124. [2019-12-27 19:05:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:05:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 19:05:17,871 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 19:05:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:17,871 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 19:05:17,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 19:05:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:17,872 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:17,872 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:18,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:18,073 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash 62921832, now seen corresponding path program 139 times [2019-12-27 19:05:18,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:18,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369081487] [2019-12-27 19:05:18,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:18,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369081487] [2019-12-27 19:05:18,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282927064] [2019-12-27 19:05:18,144 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:18,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:18,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:05:18,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:18,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:18,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [181591196] [2019-12-27 19:05:18,238 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:18,239 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:18,241 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:18,241 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:18,241 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:18,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:18,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:18,241 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 19:05:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:18,568 INFO L93 Difference]: Finished difference Result 333 states and 740 transitions. [2019-12-27 19:05:18,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:05:18,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:18,569 INFO L225 Difference]: With dead ends: 333 [2019-12-27 19:05:18,570 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 19:05:18,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:05:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 19:05:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 123. [2019-12-27 19:05:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 19:05:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-27 19:05:18,574 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 18 [2019-12-27 19:05:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:18,579 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-27 19:05:18,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-27 19:05:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:18,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:18,580 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:18,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:18,780 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 981260962, now seen corresponding path program 140 times [2019-12-27 19:05:18,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:18,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582422741] [2019-12-27 19:05:18,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:18,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582422741] [2019-12-27 19:05:18,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787217082] [2019-12-27 19:05:18,851 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:18,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:18,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:18,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:18,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:18,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:18,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:18,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224954668] [2019-12-27 19:05:18,949 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:18,950 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:18,951 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:18,952 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:18,952 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:18,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:18,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:18,952 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 13 states. [2019-12-27 19:05:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:19,273 INFO L93 Difference]: Finished difference Result 333 states and 740 transitions. [2019-12-27 19:05:19,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:05:19,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:19,274 INFO L225 Difference]: With dead ends: 333 [2019-12-27 19:05:19,274 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 19:05:19,275 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:05:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 19:05:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 119. [2019-12-27 19:05:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 19:05:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 277 transitions. [2019-12-27 19:05:19,278 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 277 transitions. Word has length 18 [2019-12-27 19:05:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:19,278 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 277 transitions. [2019-12-27 19:05:19,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 277 transitions. [2019-12-27 19:05:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:19,279 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:19,279 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:19,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:19,482 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1965186625, now seen corresponding path program 141 times [2019-12-27 19:05:19,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:19,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666996523] [2019-12-27 19:05:19,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:19,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666996523] [2019-12-27 19:05:19,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820177885] [2019-12-27 19:05:19,553 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:19,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:05:19,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:19,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:19,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:19,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:19,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:19,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1226949190] [2019-12-27 19:05:19,646 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:19,647 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:19,649 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:19,649 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:19,706 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:19,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:19,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:19,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:19,707 INFO L87 Difference]: Start difference. First operand 119 states and 277 transitions. Second operand 17 states. [2019-12-27 19:05:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:20,289 INFO L93 Difference]: Finished difference Result 364 states and 784 transitions. [2019-12-27 19:05:20,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:05:20,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:20,290 INFO L225 Difference]: With dead ends: 364 [2019-12-27 19:05:20,290 INFO L226 Difference]: Without dead ends: 362 [2019-12-27 19:05:20,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=669, Invalid=1493, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 19:05:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-12-27 19:05:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 124. [2019-12-27 19:05:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:05:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 19:05:20,293 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 19:05:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:20,293 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 19:05:20,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 19:05:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:20,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:20,294 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:20,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:20,495 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash -195331986, now seen corresponding path program 142 times [2019-12-27 19:05:20,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:20,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951915968] [2019-12-27 19:05:20,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:20,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951915968] [2019-12-27 19:05:20,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855978513] [2019-12-27 19:05:20,565 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:20,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:20,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:20,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:20,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:20,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:20,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:20,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509514312] [2019-12-27 19:05:20,657 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:20,658 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:20,660 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:20,660 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:20,687 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:20,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:20,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:05:20,688 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 15 states. [2019-12-27 19:05:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:21,119 INFO L93 Difference]: Finished difference Result 345 states and 756 transitions. [2019-12-27 19:05:21,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:05:21,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:21,121 INFO L225 Difference]: With dead ends: 345 [2019-12-27 19:05:21,121 INFO L226 Difference]: Without dead ends: 343 [2019-12-27 19:05:21,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:05:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-12-27 19:05:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 125. [2019-12-27 19:05:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:05:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 19:05:21,125 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 18 [2019-12-27 19:05:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:21,125 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 19:05:21,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 19:05:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:21,126 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:21,126 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:21,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:21,326 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:21,327 INFO L82 PathProgramCache]: Analyzing trace with hash 763312603, now seen corresponding path program 143 times [2019-12-27 19:05:21,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:21,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109750988] [2019-12-27 19:05:21,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:21,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109750988] [2019-12-27 19:05:21,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001092271] [2019-12-27 19:05:21,401 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:21,447 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:05:21,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:21,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:05:21,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:21,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:21,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 19:05:21,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [353856862] [2019-12-27 19:05:21,512 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:21,513 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:21,515 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 19:05:21,515 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:21,515 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:21,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:21,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:21,516 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 13 states. [2019-12-27 19:05:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:21,857 INFO L93 Difference]: Finished difference Result 318 states and 703 transitions. [2019-12-27 19:05:21,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:21,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:21,858 INFO L225 Difference]: With dead ends: 318 [2019-12-27 19:05:21,858 INFO L226 Difference]: Without dead ends: 316 [2019-12-27 19:05:21,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:05:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-12-27 19:05:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 125. [2019-12-27 19:05:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:05:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 19:05:21,862 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 18 [2019-12-27 19:05:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:21,862 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 19:05:21,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 19:05:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:21,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:21,863 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:22,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:22,064 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash -637731858, now seen corresponding path program 144 times [2019-12-27 19:05:22,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:22,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254153728] [2019-12-27 19:05:22,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:22,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254153728] [2019-12-27 19:05:22,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380548337] [2019-12-27 19:05:22,141 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:22,208 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:22,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:22,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:22,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:05:22,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:22,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:22,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243347088] [2019-12-27 19:05:22,249 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:22,250 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:22,252 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:22,252 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:22,252 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:22,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:22,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:22,253 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 13 states. [2019-12-27 19:05:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:22,628 INFO L93 Difference]: Finished difference Result 339 states and 749 transitions. [2019-12-27 19:05:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:22,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:22,629 INFO L225 Difference]: With dead ends: 339 [2019-12-27 19:05:22,629 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 19:05:22,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:05:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 19:05:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 124. [2019-12-27 19:05:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:05:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 19:05:22,633 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 19:05:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:22,633 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 19:05:22,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 19:05:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:22,634 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:22,634 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:22,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:22,834 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash 280607272, now seen corresponding path program 145 times [2019-12-27 19:05:22,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:22,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939523236] [2019-12-27 19:05:22,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:22,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939523236] [2019-12-27 19:05:22,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433259440] [2019-12-27 19:05:22,909 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:22,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:22,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:05:23,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:23,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:23,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101510262] [2019-12-27 19:05:23,021 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:23,022 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:23,025 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:23,025 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:23,025 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:23,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:23,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:23,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:23,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:23,026 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 19:05:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:23,592 INFO L93 Difference]: Finished difference Result 333 states and 732 transitions. [2019-12-27 19:05:23,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:23,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:23,594 INFO L225 Difference]: With dead ends: 333 [2019-12-27 19:05:23,594 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 19:05:23,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:05:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 19:05:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 121. [2019-12-27 19:05:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 19:05:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 284 transitions. [2019-12-27 19:05:23,600 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 284 transitions. Word has length 18 [2019-12-27 19:05:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:23,600 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 284 transitions. [2019-12-27 19:05:23,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 284 transitions. [2019-12-27 19:05:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:23,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:23,601 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:23,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:23,802 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:23,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2020671937, now seen corresponding path program 146 times [2019-12-27 19:05:23,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:23,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364034369] [2019-12-27 19:05:23,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:23,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364034369] [2019-12-27 19:05:23,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857748021] [2019-12-27 19:05:23,928 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:24,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:24,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:24,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:24,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:05:24,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:24,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:24,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1330115722] [2019-12-27 19:05:24,099 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:24,102 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:24,105 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:24,105 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:24,164 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:24,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:24,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:24,165 INFO L87 Difference]: Start difference. First operand 121 states and 284 transitions. Second operand 15 states. [2019-12-27 19:05:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:24,713 INFO L93 Difference]: Finished difference Result 355 states and 773 transitions. [2019-12-27 19:05:24,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:05:24,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:24,714 INFO L225 Difference]: With dead ends: 355 [2019-12-27 19:05:24,714 INFO L226 Difference]: Without dead ends: 353 [2019-12-27 19:05:24,714 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=503, Invalid=1137, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:05:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-12-27 19:05:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 124. [2019-12-27 19:05:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:05:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 19:05:24,718 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 19:05:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:24,718 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 19:05:24,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 19:05:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:24,718 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:24,719 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:24,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:24,923 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1315650770, now seen corresponding path program 147 times [2019-12-27 19:05:24,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:24,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650688899] [2019-12-27 19:05:24,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:24,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650688899] [2019-12-27 19:05:24,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059623302] [2019-12-27 19:05:24,996 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:25,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:05:25,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:25,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:25,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:25,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:25,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:25,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [757425109] [2019-12-27 19:05:25,104 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:25,105 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:25,107 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:25,107 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:25,108 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:25,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:25,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:25,108 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 19:05:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:25,466 INFO L93 Difference]: Finished difference Result 338 states and 742 transitions. [2019-12-27 19:05:25,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:25,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:25,467 INFO L225 Difference]: With dead ends: 338 [2019-12-27 19:05:25,468 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 19:05:25,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:05:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 19:05:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 123. [2019-12-27 19:05:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 19:05:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-27 19:05:25,472 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 18 [2019-12-27 19:05:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:25,472 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-27 19:05:25,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-27 19:05:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:25,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:25,472 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:25,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:25,673 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1578272065, now seen corresponding path program 148 times [2019-12-27 19:05:25,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:25,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109201269] [2019-12-27 19:05:25,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:25,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109201269] [2019-12-27 19:05:25,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132087539] [2019-12-27 19:05:25,752 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:25,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:25,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:25,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:25,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:25,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:25,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:25,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [591835429] [2019-12-27 19:05:25,937 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:25,939 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:25,942 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:25,942 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:25,943 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:05:25,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:25,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:25,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:25,944 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 13 states. [2019-12-27 19:05:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:26,328 INFO L93 Difference]: Finished difference Result 354 states and 773 transitions. [2019-12-27 19:05:26,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:26,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:26,330 INFO L225 Difference]: With dead ends: 354 [2019-12-27 19:05:26,330 INFO L226 Difference]: Without dead ends: 352 [2019-12-27 19:05:26,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-12-27 19:05:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 115. [2019-12-27 19:05:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:05:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 267 transitions. [2019-12-27 19:05:26,334 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 267 transitions. Word has length 18 [2019-12-27 19:05:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:26,334 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 267 transitions. [2019-12-27 19:05:26,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 267 transitions. [2019-12-27 19:05:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:26,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:26,335 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:26,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:26,536 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash -458126527, now seen corresponding path program 149 times [2019-12-27 19:05:26,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:26,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895783341] [2019-12-27 19:05:26,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:26,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895783341] [2019-12-27 19:05:26,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963765447] [2019-12-27 19:05:26,603 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:26,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:05:26,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:26,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:26,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:05:26,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:26,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:26,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1161551733] [2019-12-27 19:05:26,690 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:26,691 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:26,693 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:26,693 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:26,814 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 19:05:26,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:05:26,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:05:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:05:26,816 INFO L87 Difference]: Start difference. First operand 115 states and 267 transitions. Second operand 21 states. [2019-12-27 19:05:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:27,868 INFO L93 Difference]: Finished difference Result 462 states and 1002 transitions. [2019-12-27 19:05:27,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-12-27 19:05:27,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 18 [2019-12-27 19:05:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:27,870 INFO L225 Difference]: With dead ends: 462 [2019-12-27 19:05:27,870 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 19:05:27,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1165, Invalid=2867, Unknown=0, NotChecked=0, Total=4032 [2019-12-27 19:05:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 19:05:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 131. [2019-12-27 19:05:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:05:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-27 19:05:27,875 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 18 [2019-12-27 19:05:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:27,875 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-27 19:05:27,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:05:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-27 19:05:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:27,876 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:27,876 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:28,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:28,079 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:28,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1874344210, now seen corresponding path program 150 times [2019-12-27 19:05:28,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:28,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407879665] [2019-12-27 19:05:28,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:28,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407879665] [2019-12-27 19:05:28,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502223750] [2019-12-27 19:05:28,152 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:28,220 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:28,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:28,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:28,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:28,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:28,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:28,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [517520601] [2019-12-27 19:05:28,261 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:28,263 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:28,265 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:28,266 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:28,647 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 19:05:28,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:05:28,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:05:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:05:28,648 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 19 states. [2019-12-27 19:05:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:29,413 INFO L93 Difference]: Finished difference Result 424 states and 922 transitions. [2019-12-27 19:05:29,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:05:29,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-27 19:05:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:29,415 INFO L225 Difference]: With dead ends: 424 [2019-12-27 19:05:29,415 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 19:05:29,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=1895, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 19:05:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 19:05:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 131. [2019-12-27 19:05:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:05:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-27 19:05:29,419 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 18 [2019-12-27 19:05:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:29,419 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-27 19:05:29,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:05:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-27 19:05:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:29,419 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:29,419 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:29,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:29,620 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 631441883, now seen corresponding path program 151 times [2019-12-27 19:05:29,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:29,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221807816] [2019-12-27 19:05:29,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:29,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221807816] [2019-12-27 19:05:29,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485599514] [2019-12-27 19:05:29,692 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:29,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:05:29,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:29,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:29,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 19:05:29,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1305194812] [2019-12-27 19:05:29,816 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:29,817 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:29,820 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:29,820 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:29,887 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 19:05:29,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:29,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:05:29,888 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 17 states. [2019-12-27 19:05:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:30,358 INFO L93 Difference]: Finished difference Result 369 states and 813 transitions. [2019-12-27 19:05:30,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:30,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:30,359 INFO L225 Difference]: With dead ends: 369 [2019-12-27 19:05:30,359 INFO L226 Difference]: Without dead ends: 367 [2019-12-27 19:05:30,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=508, Invalid=1298, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:05:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-12-27 19:05:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 131. [2019-12-27 19:05:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:05:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-27 19:05:30,363 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 18 [2019-12-27 19:05:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:30,363 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-27 19:05:30,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-27 19:05:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:30,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:30,363 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:30,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:30,564 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:30,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1529076728, now seen corresponding path program 152 times [2019-12-27 19:05:30,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:30,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079656133] [2019-12-27 19:05:30,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:30,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079656133] [2019-12-27 19:05:30,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664092180] [2019-12-27 19:05:30,634 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:30,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:30,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:30,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:05:30,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:30,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:30,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2019-12-27 19:05:30,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1041533902] [2019-12-27 19:05:30,784 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:30,785 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:30,788 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 19:05:30,788 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:30,830 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 19:05:30,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:30,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:05:30,831 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 15 states. [2019-12-27 19:05:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:31,118 INFO L93 Difference]: Finished difference Result 304 states and 680 transitions. [2019-12-27 19:05:31,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:05:31,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:31,119 INFO L225 Difference]: With dead ends: 304 [2019-12-27 19:05:31,119 INFO L226 Difference]: Without dead ends: 302 [2019-12-27 19:05:31,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:05:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-12-27 19:05:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 133. [2019-12-27 19:05:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:31,122 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:31,122 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:31,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:31,123 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:31,123 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:31,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:31,324 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1971476600, now seen corresponding path program 153 times [2019-12-27 19:05:31,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:31,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383581134] [2019-12-27 19:05:31,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:31,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383581134] [2019-12-27 19:05:31,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933461393] [2019-12-27 19:05:31,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:31,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:05:31,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:31,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:31,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-27 19:05:31,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:31,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:31,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [70146982] [2019-12-27 19:05:31,497 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:31,498 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:31,500 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:31,500 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:31,501 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:05:31,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:31,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:31,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:31,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:31,502 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 19:05:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:31,689 INFO L93 Difference]: Finished difference Result 312 states and 704 transitions. [2019-12-27 19:05:31,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:31,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:31,691 INFO L225 Difference]: With dead ends: 312 [2019-12-27 19:05:31,691 INFO L226 Difference]: Without dead ends: 310 [2019-12-27 19:05:31,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-12-27 19:05:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 133. [2019-12-27 19:05:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:31,697 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:31,697 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:31,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:31,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:31,698 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:31,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:31,903 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1053137470, now seen corresponding path program 154 times [2019-12-27 19:05:31,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:31,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718086331] [2019-12-27 19:05:31,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:32,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718086331] [2019-12-27 19:05:32,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944067124] [2019-12-27 19:05:32,016 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:32,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:32,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:32,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:32,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-27 19:05:32,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:32,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:32,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1728995277] [2019-12-27 19:05:32,147 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:32,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:32,151 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:32,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:32,153 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:05:32,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:32,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:32,155 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 19:05:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:32,386 INFO L93 Difference]: Finished difference Result 327 states and 743 transitions. [2019-12-27 19:05:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:32,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:32,387 INFO L225 Difference]: With dead ends: 327 [2019-12-27 19:05:32,387 INFO L226 Difference]: Without dead ends: 325 [2019-12-27 19:05:32,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-12-27 19:05:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 133. [2019-12-27 19:05:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:32,391 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:32,391 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:32,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:32,391 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:32,392 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:32,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:32,595 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash 686927195, now seen corresponding path program 155 times [2019-12-27 19:05:32,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:32,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027511551] [2019-12-27 19:05:32,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:32,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027511551] [2019-12-27 19:05:32,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073709562] [2019-12-27 19:05:32,658 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:32,720 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:05:32,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:32,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:05:32,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:32,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:32,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:05:32,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [617596802] [2019-12-27 19:05:32,729 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:32,730 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:32,732 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 19:05:32,732 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:32,756 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:05:32,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:32,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:32,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:32,757 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 15 states. [2019-12-27 19:05:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:33,020 INFO L93 Difference]: Finished difference Result 377 states and 845 transitions. [2019-12-27 19:05:33,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:05:33,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:33,022 INFO L225 Difference]: With dead ends: 377 [2019-12-27 19:05:33,022 INFO L226 Difference]: Without dead ends: 375 [2019-12-27 19:05:33,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:05:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-12-27 19:05:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 135. [2019-12-27 19:05:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 19:05:33,025 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 19:05:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:33,025 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 19:05:33,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 19:05:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:33,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:33,026 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:33,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:33,226 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1645571784, now seen corresponding path program 156 times [2019-12-27 19:05:33,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:33,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674410194] [2019-12-27 19:05:33,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:33,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674410194] [2019-12-27 19:05:33,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749822006] [2019-12-27 19:05:33,312 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:33,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:05:33,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:33,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:33,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:05:33,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:33,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:33,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1715313371] [2019-12-27 19:05:33,390 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:33,391 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:33,393 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:33,393 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:33,394 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:05:33,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:33,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:33,395 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 13 states. [2019-12-27 19:05:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:33,573 INFO L93 Difference]: Finished difference Result 339 states and 767 transitions. [2019-12-27 19:05:33,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:33,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:33,574 INFO L225 Difference]: With dead ends: 339 [2019-12-27 19:05:33,574 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 19:05:33,574 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 19:05:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 135. [2019-12-27 19:05:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 19:05:33,578 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 19:05:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:33,578 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 19:05:33,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 19:05:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:33,578 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:33,578 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:33,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:33,779 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:33,780 INFO L82 PathProgramCache]: Analyzing trace with hash 244527323, now seen corresponding path program 157 times [2019-12-27 19:05:33,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:33,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170985760] [2019-12-27 19:05:33,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:33,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170985760] [2019-12-27 19:05:33,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025673528] [2019-12-27 19:05:33,847 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:33,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:33,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:05:33,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:33,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:33,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1029803968] [2019-12-27 19:05:33,936 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:33,936 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:33,938 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:33,938 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:33,939 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:05:33,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:33,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:33,939 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 13 states. [2019-12-27 19:05:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:34,143 INFO L93 Difference]: Finished difference Result 367 states and 819 transitions. [2019-12-27 19:05:34,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:05:34,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:34,145 INFO L225 Difference]: With dead ends: 367 [2019-12-27 19:05:34,145 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 19:05:34,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:05:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 19:05:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 133. [2019-12-27 19:05:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:34,148 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:34,148 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:34,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:34,149 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:34,149 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:34,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:34,350 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1552431851, now seen corresponding path program 158 times [2019-12-27 19:05:34,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:34,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541196469] [2019-12-27 19:05:34,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:34,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541196469] [2019-12-27 19:05:34,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551710959] [2019-12-27 19:05:34,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:34,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:34,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:34,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:05:34,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:34,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:34,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 19:05:34,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [847160137] [2019-12-27 19:05:34,543 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:34,544 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:34,546 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:34,546 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:34,591 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:05:34,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:34,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:34,592 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 15 states. [2019-12-27 19:05:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:34,934 INFO L93 Difference]: Finished difference Result 375 states and 847 transitions. [2019-12-27 19:05:34,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:34,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:34,935 INFO L225 Difference]: With dead ends: 375 [2019-12-27 19:05:34,935 INFO L226 Difference]: Without dead ends: 373 [2019-12-27 19:05:34,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:05:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2019-12-27 19:05:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 136. [2019-12-27 19:05:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 19:05:34,939 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 19:05:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:34,939 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 19:05:34,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 19:05:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:34,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:34,940 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:35,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:35,140 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -593787262, now seen corresponding path program 159 times [2019-12-27 19:05:35,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:35,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377177373] [2019-12-27 19:05:35,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:35,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377177373] [2019-12-27 19:05:35,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644928989] [2019-12-27 19:05:35,214 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:35,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:05:35,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:35,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:35,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:05:35,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:35,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:35,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1449617490] [2019-12-27 19:05:35,304 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:35,304 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:35,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:35,306 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:35,307 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:35,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:35,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:35,307 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 19:05:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:35,480 INFO L93 Difference]: Finished difference Result 338 states and 772 transitions. [2019-12-27 19:05:35,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:35,480 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:35,481 INFO L225 Difference]: With dead ends: 338 [2019-12-27 19:05:35,481 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 19:05:35,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 19:05:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 136. [2019-12-27 19:05:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 19:05:35,485 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 19:05:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:35,485 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 19:05:35,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 19:05:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:35,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:35,486 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:35,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:35,687 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1994831723, now seen corresponding path program 160 times [2019-12-27 19:05:35,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:35,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257833674] [2019-12-27 19:05:35,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:35,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257833674] [2019-12-27 19:05:35,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593841501] [2019-12-27 19:05:35,750 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:35,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:35,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:35,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:35,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:05:35,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:35,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:35,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [781321066] [2019-12-27 19:05:35,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:35,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:35,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:35,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:35,841 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:35,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:35,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:35,842 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 19:05:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:36,065 INFO L93 Difference]: Finished difference Result 381 states and 867 transitions. [2019-12-27 19:05:36,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:05:36,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:36,067 INFO L225 Difference]: With dead ends: 381 [2019-12-27 19:05:36,067 INFO L226 Difference]: Without dead ends: 379 [2019-12-27 19:05:36,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:05:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-12-27 19:05:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 135. [2019-12-27 19:05:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 19:05:36,070 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 19:05:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:36,071 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 19:05:36,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 19:05:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:36,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:36,071 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:36,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:36,272 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1076492593, now seen corresponding path program 161 times [2019-12-27 19:05:36,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:36,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796921342] [2019-12-27 19:05:36,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:36,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796921342] [2019-12-27 19:05:36,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548837675] [2019-12-27 19:05:36,343 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:36,405 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:05:36,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:36,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:36,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:36,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:36,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:36,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1882491510] [2019-12-27 19:05:36,431 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:36,432 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:36,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:36,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:36,434 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:36,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:36,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:36,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:36,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:36,435 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 13 states. [2019-12-27 19:05:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:36,653 INFO L93 Difference]: Finished difference Result 379 states and 858 transitions. [2019-12-27 19:05:36,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:05:36,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:36,654 INFO L225 Difference]: With dead ends: 379 [2019-12-27 19:05:36,655 INFO L226 Difference]: Without dead ends: 377 [2019-12-27 19:05:36,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:05:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-12-27 19:05:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 133. [2019-12-27 19:05:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:36,659 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:36,659 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:36,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:36,660 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:36,660 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:36,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:36,863 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:36,864 INFO L82 PathProgramCache]: Analyzing trace with hash -92566930, now seen corresponding path program 162 times [2019-12-27 19:05:36,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:36,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147950779] [2019-12-27 19:05:36,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:36,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147950779] [2019-12-27 19:05:36,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560783451] [2019-12-27 19:05:36,953 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:37,021 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:05:37,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:37,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:37,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:37,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:37,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:37,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [844167088] [2019-12-27 19:05:37,064 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:37,064 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:37,067 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 19:05:37,067 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:37,147 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:05:37,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:37,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:37,148 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 17 states. [2019-12-27 19:05:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:37,644 INFO L93 Difference]: Finished difference Result 417 states and 924 transitions. [2019-12-27 19:05:37,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:05:37,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:37,646 INFO L225 Difference]: With dead ends: 417 [2019-12-27 19:05:37,646 INFO L226 Difference]: Without dead ends: 415 [2019-12-27 19:05:37,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=548, Invalid=1344, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:05:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-12-27 19:05:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 135. [2019-12-27 19:05:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 19:05:37,650 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 19:05:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:37,650 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 19:05:37,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 19:05:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:37,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:37,651 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:37,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:37,852 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2041881755, now seen corresponding path program 163 times [2019-12-27 19:05:37,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:37,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286184404] [2019-12-27 19:05:37,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:37,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286184404] [2019-12-27 19:05:37,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219255805] [2019-12-27 19:05:37,930 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:37,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:05:37,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:38,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:38,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 19:05:38,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1897741232] [2019-12-27 19:05:38,072 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:38,073 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:38,074 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:38,074 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:38,116 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:05:38,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:38,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:38,117 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 15 states. [2019-12-27 19:05:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:38,460 INFO L93 Difference]: Finished difference Result 374 states and 841 transitions. [2019-12-27 19:05:38,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:05:38,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:38,461 INFO L225 Difference]: With dead ends: 374 [2019-12-27 19:05:38,461 INFO L226 Difference]: Without dead ends: 372 [2019-12-27 19:05:38,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=1077, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:05:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-12-27 19:05:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 137. [2019-12-27 19:05:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 19:05:38,466 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 19:05:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:38,466 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 19:05:38,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 19:05:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:38,466 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:38,466 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:38,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:38,667 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1294440952, now seen corresponding path program 164 times [2019-12-27 19:05:38,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:38,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805485448] [2019-12-27 19:05:38,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:38,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805485448] [2019-12-27 19:05:38,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114886391] [2019-12-27 19:05:38,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:38,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:38,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:38,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:38,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-27 19:05:38,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:38,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:38,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [236007237] [2019-12-27 19:05:38,824 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:38,825 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:38,826 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:38,827 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:38,827 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:38,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:38,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:38,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:38,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:38,828 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 19:05:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:39,010 INFO L93 Difference]: Finished difference Result 334 states and 758 transitions. [2019-12-27 19:05:39,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:39,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:39,011 INFO L225 Difference]: With dead ends: 334 [2019-12-27 19:05:39,012 INFO L226 Difference]: Without dead ends: 332 [2019-12-27 19:05:39,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-27 19:05:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 137. [2019-12-27 19:05:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 19:05:39,016 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 19:05:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:39,016 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 19:05:39,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 19:05:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:39,016 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:39,016 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:39,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:39,219 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:39,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:39,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1599481883, now seen corresponding path program 165 times [2019-12-27 19:05:39,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:39,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844810940] [2019-12-27 19:05:39,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:39,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844810940] [2019-12-27 19:05:39,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759724383] [2019-12-27 19:05:39,290 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:39,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:05:39,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:39,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:39,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-27 19:05:39,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:39,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:39,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1570037799] [2019-12-27 19:05:39,387 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:39,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:39,389 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:39,389 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:39,390 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:39,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:39,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:39,390 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 19:05:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:39,642 INFO L93 Difference]: Finished difference Result 371 states and 843 transitions. [2019-12-27 19:05:39,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:05:39,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:39,643 INFO L225 Difference]: With dead ends: 371 [2019-12-27 19:05:39,644 INFO L226 Difference]: Without dead ends: 369 [2019-12-27 19:05:39,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:05:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2019-12-27 19:05:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 136. [2019-12-27 19:05:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 19:05:39,647 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 19:05:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:39,647 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 19:05:39,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 19:05:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:39,648 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:39,648 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:39,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:39,849 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1777146283, now seen corresponding path program 166 times [2019-12-27 19:05:39,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:39,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531228031] [2019-12-27 19:05:39,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:39,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531228031] [2019-12-27 19:05:39,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566271168] [2019-12-27 19:05:39,918 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:39,977 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:39,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:39,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:39,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:40,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:40,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:40,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [428977267] [2019-12-27 19:05:40,001 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:40,002 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:40,003 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:40,003 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:40,004 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:40,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:40,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:40,004 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 19:05:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:40,246 INFO L93 Difference]: Finished difference Result 382 states and 864 transitions. [2019-12-27 19:05:40,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:05:40,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:40,247 INFO L225 Difference]: With dead ends: 382 [2019-12-27 19:05:40,248 INFO L226 Difference]: Without dead ends: 380 [2019-12-27 19:05:40,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:05:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-12-27 19:05:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 135. [2019-12-27 19:05:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 19:05:40,252 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 19:05:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:40,252 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 19:05:40,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 19:05:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:40,253 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:40,253 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:40,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:40,456 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash -37081618, now seen corresponding path program 167 times [2019-12-27 19:05:40,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:40,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558509699] [2019-12-27 19:05:40,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:40,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558509699] [2019-12-27 19:05:40,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638455784] [2019-12-27 19:05:40,524 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:40,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:05:40,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:40,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:05:40,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:40,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:40,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:05:40,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [146617369] [2019-12-27 19:05:40,591 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:40,591 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:40,595 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:40,595 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:40,627 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:05:40,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:40,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:40,628 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 15 states. [2019-12-27 19:05:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:40,936 INFO L93 Difference]: Finished difference Result 398 states and 881 transitions. [2019-12-27 19:05:40,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:05:40,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:40,937 INFO L225 Difference]: With dead ends: 398 [2019-12-27 19:05:40,938 INFO L226 Difference]: Without dead ends: 396 [2019-12-27 19:05:40,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=745, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:05:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2019-12-27 19:05:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 137. [2019-12-27 19:05:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 330 transitions. [2019-12-27 19:05:40,941 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 330 transitions. Word has length 18 [2019-12-27 19:05:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:40,941 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 330 transitions. [2019-12-27 19:05:40,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 330 transitions. [2019-12-27 19:05:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:40,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:40,942 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:41,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:41,143 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:41,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:41,143 INFO L82 PathProgramCache]: Analyzing trace with hash 921562971, now seen corresponding path program 168 times [2019-12-27 19:05:41,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:41,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228232200] [2019-12-27 19:05:41,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:41,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228232200] [2019-12-27 19:05:41,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992144248] [2019-12-27 19:05:41,221 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:41,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:41,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:41,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:41,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:41,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:41,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:41,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1940563653] [2019-12-27 19:05:41,321 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:41,322 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:41,323 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:41,323 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:41,324 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:41,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:41,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:41,324 INFO L87 Difference]: Start difference. First operand 137 states and 330 transitions. Second operand 13 states. [2019-12-27 19:05:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:41,562 INFO L93 Difference]: Finished difference Result 375 states and 835 transitions. [2019-12-27 19:05:41,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:05:41,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:41,564 INFO L225 Difference]: With dead ends: 375 [2019-12-27 19:05:41,564 INFO L226 Difference]: Without dead ends: 373 [2019-12-27 19:05:41,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:05:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2019-12-27 19:05:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 137. [2019-12-27 19:05:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 330 transitions. [2019-12-27 19:05:41,568 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 330 transitions. Word has length 18 [2019-12-27 19:05:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:41,568 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 330 transitions. [2019-12-27 19:05:41,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 330 transitions. [2019-12-27 19:05:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:41,568 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:41,569 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:41,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:41,769 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash -479481490, now seen corresponding path program 169 times [2019-12-27 19:05:41,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:41,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922867689] [2019-12-27 19:05:41,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:41,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922867689] [2019-12-27 19:05:41,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306248199] [2019-12-27 19:05:41,837 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:41,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:41,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:41,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:41,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:41,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1194727373] [2019-12-27 19:05:41,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:41,943 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:41,945 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:41,945 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:41,945 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:41,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:41,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:41,946 INFO L87 Difference]: Start difference. First operand 137 states and 330 transitions. Second operand 13 states. [2019-12-27 19:05:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:42,203 INFO L93 Difference]: Finished difference Result 396 states and 871 transitions. [2019-12-27 19:05:42,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:05:42,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:42,205 INFO L225 Difference]: With dead ends: 396 [2019-12-27 19:05:42,205 INFO L226 Difference]: Without dead ends: 394 [2019-12-27 19:05:42,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:05:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2019-12-27 19:05:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 133. [2019-12-27 19:05:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:42,210 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:42,210 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:42,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:42,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:42,211 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:42,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:42,414 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -337994840, now seen corresponding path program 170 times [2019-12-27 19:05:42,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:42,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870477594] [2019-12-27 19:05:42,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:42,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870477594] [2019-12-27 19:05:42,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438331205] [2019-12-27 19:05:42,480 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:42,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:42,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:42,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:42,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:42,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:42,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:42,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [741763912] [2019-12-27 19:05:42,603 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:42,604 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:42,606 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:42,606 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:42,668 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:05:42,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:42,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:42,669 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 17 states. [2019-12-27 19:05:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:43,174 INFO L93 Difference]: Finished difference Result 399 states and 891 transitions. [2019-12-27 19:05:43,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:05:43,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:43,175 INFO L225 Difference]: With dead ends: 399 [2019-12-27 19:05:43,175 INFO L226 Difference]: Without dead ends: 397 [2019-12-27 19:05:43,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=578, Invalid=1402, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:05:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2019-12-27 19:05:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 134. [2019-12-27 19:05:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:05:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:05:43,180 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:05:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:43,180 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:05:43,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:05:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:43,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:43,180 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:43,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:43,381 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1796453845, now seen corresponding path program 171 times [2019-12-27 19:05:43,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:43,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968354265] [2019-12-27 19:05:43,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:43,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968354265] [2019-12-27 19:05:43,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508880670] [2019-12-27 19:05:43,447 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:43,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:05:43,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:43,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:43,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:05:43,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:43,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:43,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [524481158] [2019-12-27 19:05:43,535 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:43,536 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:43,537 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:43,537 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:43,565 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:43,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:43,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:43,566 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 19:05:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:43,908 INFO L93 Difference]: Finished difference Result 360 states and 816 transitions. [2019-12-27 19:05:43,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:05:43,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:43,910 INFO L225 Difference]: With dead ends: 360 [2019-12-27 19:05:43,910 INFO L226 Difference]: Without dead ends: 358 [2019-12-27 19:05:43,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:05:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2019-12-27 19:05:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 136. [2019-12-27 19:05:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2019-12-27 19:05:43,918 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 18 [2019-12-27 19:05:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:43,919 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2019-12-27 19:05:43,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2019-12-27 19:05:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:43,919 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:43,919 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:44,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:44,123 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:44,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1539868862, now seen corresponding path program 172 times [2019-12-27 19:05:44,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:44,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414595967] [2019-12-27 19:05:44,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:44,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414595967] [2019-12-27 19:05:44,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996308456] [2019-12-27 19:05:44,196 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:44,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:44,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:44,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:44,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-27 19:05:44,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:44,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:44,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1313134334] [2019-12-27 19:05:44,275 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:44,276 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:44,278 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:44,278 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:44,278 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:44,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:44,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:44,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:44,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:44,279 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand 13 states. [2019-12-27 19:05:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:44,454 INFO L93 Difference]: Finished difference Result 315 states and 723 transitions. [2019-12-27 19:05:44,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:44,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:44,455 INFO L225 Difference]: With dead ends: 315 [2019-12-27 19:05:44,455 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 19:05:44,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 19:05:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 136. [2019-12-27 19:05:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2019-12-27 19:05:44,460 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 18 [2019-12-27 19:05:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:44,460 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2019-12-27 19:05:44,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2019-12-27 19:05:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:44,460 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:44,460 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:44,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:44,661 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1354053973, now seen corresponding path program 173 times [2019-12-27 19:05:44,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:44,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212615161] [2019-12-27 19:05:44,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:44,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212615161] [2019-12-27 19:05:44,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305327171] [2019-12-27 19:05:44,733 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:44,797 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:05:44,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:44,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:44,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-27 19:05:44,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:44,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:44,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1443405047] [2019-12-27 19:05:44,821 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:44,821 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:44,823 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:44,823 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:44,823 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:44,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:44,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:44,824 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand 13 states. [2019-12-27 19:05:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:45,067 INFO L93 Difference]: Finished difference Result 356 states and 817 transitions. [2019-12-27 19:05:45,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:05:45,067 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:45,068 INFO L225 Difference]: With dead ends: 356 [2019-12-27 19:05:45,068 INFO L226 Difference]: Without dead ends: 354 [2019-12-27 19:05:45,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:05:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-12-27 19:05:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 135. [2019-12-27 19:05:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:05:45,072 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:05:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:45,072 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:05:45,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:05:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:45,073 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:45,073 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:45,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:45,273 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2022574193, now seen corresponding path program 174 times [2019-12-27 19:05:45,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:45,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125731959] [2019-12-27 19:05:45,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:45,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125731959] [2019-12-27 19:05:45,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758619169] [2019-12-27 19:05:45,354 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:45,423 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:05:45,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:45,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:45,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-27 19:05:45,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:45,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:45,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [759763735] [2019-12-27 19:05:45,456 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:45,457 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:45,458 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:45,458 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:45,459 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:45,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:45,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:45,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:45,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:45,459 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 19:05:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:45,717 INFO L93 Difference]: Finished difference Result 357 states and 817 transitions. [2019-12-27 19:05:45,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:05:45,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:45,718 INFO L225 Difference]: With dead ends: 357 [2019-12-27 19:05:45,719 INFO L226 Difference]: Without dead ends: 355 [2019-12-27 19:05:45,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:05:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-12-27 19:05:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 134. [2019-12-27 19:05:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:05:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:05:45,722 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:05:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:45,722 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:05:45,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:05:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:45,723 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:45,723 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:45,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:45,924 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash -282509528, now seen corresponding path program 175 times [2019-12-27 19:05:45,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:45,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748568947] [2019-12-27 19:05:45,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:45,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748568947] [2019-12-27 19:05:45,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86527522] [2019-12-27 19:05:45,991 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:46,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:46,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:46,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:46,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:46,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1183100509] [2019-12-27 19:05:46,114 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:46,114 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:46,117 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:46,117 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:46,150 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:46,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:46,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:46,151 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 19:05:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:46,517 INFO L93 Difference]: Finished difference Result 390 states and 876 transitions. [2019-12-27 19:05:46,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:46,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:46,519 INFO L225 Difference]: With dead ends: 390 [2019-12-27 19:05:46,519 INFO L226 Difference]: Without dead ends: 388 [2019-12-27 19:05:46,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:05:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2019-12-27 19:05:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 136. [2019-12-27 19:05:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 19:05:46,522 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 19:05:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:46,523 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 19:05:46,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 19:05:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:46,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:46,523 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:46,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:46,724 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash 676135061, now seen corresponding path program 176 times [2019-12-27 19:05:46,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:46,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171751318] [2019-12-27 19:05:46,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:46,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171751318] [2019-12-27 19:05:46,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506900320] [2019-12-27 19:05:46,797 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:46,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:46,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:46,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:46,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:05:46,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:46,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:46,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230078444] [2019-12-27 19:05:46,883 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:46,883 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:46,885 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:46,885 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:46,885 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:46,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:46,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:46,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:46,886 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 19:05:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:47,146 INFO L93 Difference]: Finished difference Result 374 states and 849 transitions. [2019-12-27 19:05:47,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:05:47,146 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:47,147 INFO L225 Difference]: With dead ends: 374 [2019-12-27 19:05:47,147 INFO L226 Difference]: Without dead ends: 372 [2019-12-27 19:05:47,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:05:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-12-27 19:05:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 136. [2019-12-27 19:05:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 19:05:47,150 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 19:05:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:47,151 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 19:05:47,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 19:05:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:47,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:47,151 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:47,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:47,352 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash -724909400, now seen corresponding path program 177 times [2019-12-27 19:05:47,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:47,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730109684] [2019-12-27 19:05:47,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:47,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730109684] [2019-12-27 19:05:47,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313294922] [2019-12-27 19:05:47,436 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:47,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:05:47,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:47,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:47,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:05:47,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:47,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:47,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1655004317] [2019-12-27 19:05:47,542 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:47,542 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:47,544 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:47,544 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:47,544 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:47,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:47,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:47,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:47,545 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 19:05:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:47,832 INFO L93 Difference]: Finished difference Result 393 states and 890 transitions. [2019-12-27 19:05:47,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:05:47,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:47,833 INFO L225 Difference]: With dead ends: 393 [2019-12-27 19:05:47,833 INFO L226 Difference]: Without dead ends: 391 [2019-12-27 19:05:47,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:05:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2019-12-27 19:05:47,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 133. [2019-12-27 19:05:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:47,836 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:47,837 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:47,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:47,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:47,837 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:48,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:48,038 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1773098722, now seen corresponding path program 178 times [2019-12-27 19:05:48,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:48,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643642915] [2019-12-27 19:05:48,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:48,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643642915] [2019-12-27 19:05:48,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811545373] [2019-12-27 19:05:48,112 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:48,170 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:48,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:48,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:48,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:48,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:48,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:48,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726338370] [2019-12-27 19:05:48,207 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:48,208 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:48,209 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:48,209 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:48,239 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:05:48,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:48,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:05:48,240 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 15 states. [2019-12-27 19:05:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:48,625 INFO L93 Difference]: Finished difference Result 395 states and 890 transitions. [2019-12-27 19:05:48,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:48,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:48,626 INFO L225 Difference]: With dead ends: 395 [2019-12-27 19:05:48,626 INFO L226 Difference]: Without dead ends: 393 [2019-12-27 19:05:48,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:05:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2019-12-27 19:05:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 134. [2019-12-27 19:05:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:05:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:05:48,630 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:05:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:48,630 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:05:48,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:05:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:48,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:48,631 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:48,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:48,832 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1563223985, now seen corresponding path program 179 times [2019-12-27 19:05:48,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:48,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938307629] [2019-12-27 19:05:48,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:48,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938307629] [2019-12-27 19:05:48,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122217696] [2019-12-27 19:05:48,899 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:48,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:05:48,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:48,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:48,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:05:48,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:48,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:48,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1129949807] [2019-12-27 19:05:48,983 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:48,984 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:48,986 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:05:48,986 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:48,987 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:48,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:48,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:48,987 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 19:05:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:49,242 INFO L93 Difference]: Finished difference Result 366 states and 833 transitions. [2019-12-27 19:05:49,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:05:49,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:49,243 INFO L225 Difference]: With dead ends: 366 [2019-12-27 19:05:49,243 INFO L226 Difference]: Without dead ends: 364 [2019-12-27 19:05:49,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:05:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-12-27 19:05:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 134. [2019-12-27 19:05:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:05:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:05:49,246 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:05:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:49,247 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:05:49,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:05:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:49,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:49,247 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:49,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:49,448 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1330698850, now seen corresponding path program 180 times [2019-12-27 19:05:49,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:49,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964437042] [2019-12-27 19:05:49,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:49,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964437042] [2019-12-27 19:05:49,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207770233] [2019-12-27 19:05:49,541 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:49,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:05:49,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:49,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:49,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:05:49,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:49,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:49,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [871719782] [2019-12-27 19:05:49,653 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:49,654 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:49,656 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:49,656 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:49,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:49,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:49,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:49,657 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 19:05:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:49,954 INFO L93 Difference]: Finished difference Result 394 states and 894 transitions. [2019-12-27 19:05:49,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:49,955 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:49,956 INFO L225 Difference]: With dead ends: 394 [2019-12-27 19:05:49,956 INFO L226 Difference]: Without dead ends: 392 [2019-12-27 19:05:49,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:05:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-27 19:05:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 133. [2019-12-27 19:05:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:05:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:05:49,967 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:05:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:49,967 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:05:49,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:05:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:49,967 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:49,968 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:50,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:50,168 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2045929316, now seen corresponding path program 181 times [2019-12-27 19:05:50,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:50,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847383341] [2019-12-27 19:05:50,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:50,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847383341] [2019-12-27 19:05:50,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156354874] [2019-12-27 19:05:50,240 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:50,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:50,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:50,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:50,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:50,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [349364758] [2019-12-27 19:05:50,334 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:50,335 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:50,336 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:50,337 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:50,337 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:05:50,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:50,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:50,338 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 19:05:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:50,632 INFO L93 Difference]: Finished difference Result 400 states and 901 transitions. [2019-12-27 19:05:50,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:50,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:50,633 INFO L225 Difference]: With dead ends: 400 [2019-12-27 19:05:50,633 INFO L226 Difference]: Without dead ends: 398 [2019-12-27 19:05:50,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:05:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2019-12-27 19:05:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 127. [2019-12-27 19:05:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:05:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 295 transitions. [2019-12-27 19:05:50,637 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 295 transitions. Word has length 18 [2019-12-27 19:05:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:50,637 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 295 transitions. [2019-12-27 19:05:50,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 295 transitions. [2019-12-27 19:05:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:50,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:50,637 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:50,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:50,838 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1862111551, now seen corresponding path program 182 times [2019-12-27 19:05:50,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:50,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77819770] [2019-12-27 19:05:50,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:50,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77819770] [2019-12-27 19:05:50,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562616112] [2019-12-27 19:05:50,910 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:50,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:50,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:50,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:50,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:05:50,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:50,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:50,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895023391] [2019-12-27 19:05:50,997 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:50,999 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:51,000 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 19:05:51,000 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:51,093 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:05:51,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:05:51,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:05:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:51,094 INFO L87 Difference]: Start difference. First operand 127 states and 295 transitions. Second operand 19 states. [2019-12-27 19:05:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:51,852 INFO L93 Difference]: Finished difference Result 432 states and 937 transitions. [2019-12-27 19:05:51,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 19:05:51,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-27 19:05:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:51,853 INFO L225 Difference]: With dead ends: 432 [2019-12-27 19:05:51,853 INFO L226 Difference]: Without dead ends: 430 [2019-12-27 19:05:51,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=852, Invalid=2010, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 19:05:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-27 19:05:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 134. [2019-12-27 19:05:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:05:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:05:51,858 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:05:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:51,858 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:05:51,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:05:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:05:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:51,859 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:51,859 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:52,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:52,059 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 643674542, now seen corresponding path program 183 times [2019-12-27 19:05:52,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:52,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742299996] [2019-12-27 19:05:52,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:52,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742299996] [2019-12-27 19:05:52,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233073541] [2019-12-27 19:05:52,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:52,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:05:52,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:52,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:52,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:05:52,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:52,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:52,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [19469628] [2019-12-27 19:05:52,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:52,247 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:52,248 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:52,248 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:52,312 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:05:52,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:05:52,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:05:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:05:52,313 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 17 states. [2019-12-27 19:05:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:52,844 INFO L93 Difference]: Finished difference Result 409 states and 903 transitions. [2019-12-27 19:05:52,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:05:52,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:05:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:52,845 INFO L225 Difference]: With dead ends: 409 [2019-12-27 19:05:52,845 INFO L226 Difference]: Without dead ends: 407 [2019-12-27 19:05:52,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1461, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:05:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2019-12-27 19:05:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 135. [2019-12-27 19:05:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:05:52,849 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:05:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:52,849 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:05:52,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:05:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:05:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:52,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:52,850 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:53,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:53,052 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1516844069, now seen corresponding path program 184 times [2019-12-27 19:05:53,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:53,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782378489] [2019-12-27 19:05:53,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:53,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782378489] [2019-12-27 19:05:53,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538646300] [2019-12-27 19:05:53,133 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:53,195 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:53,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:53,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:53,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:05:53,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:53,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:53,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [780490028] [2019-12-27 19:05:53,221 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:53,221 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:53,224 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:53,224 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:53,248 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:53,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:53,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:53,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:53,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:05:53,249 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 15 states. [2019-12-27 19:05:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:53,589 INFO L93 Difference]: Finished difference Result 365 states and 816 transitions. [2019-12-27 19:05:53,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:05:53,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:53,591 INFO L225 Difference]: With dead ends: 365 [2019-12-27 19:05:53,591 INFO L226 Difference]: Without dead ends: 363 [2019-12-27 19:05:53,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=929, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:05:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-12-27 19:05:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2019-12-27 19:05:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 332 transitions. [2019-12-27 19:05:53,595 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 332 transitions. Word has length 18 [2019-12-27 19:05:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:53,595 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 332 transitions. [2019-12-27 19:05:53,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 332 transitions. [2019-12-27 19:05:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:53,595 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:53,595 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:53,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:53,796 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -558199480, now seen corresponding path program 185 times [2019-12-27 19:05:53,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:53,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122931942] [2019-12-27 19:05:53,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:53,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122931942] [2019-12-27 19:05:53,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499425209] [2019-12-27 19:05:53,866 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:53,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:05:53,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:53,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:05:53,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 19:05:53,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:53,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 19:05:53,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [785888517] [2019-12-27 19:05:53,946 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:53,946 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:53,948 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 19:05:53,948 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:53,949 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:05:53,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:53,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:05:53,949 INFO L87 Difference]: Start difference. First operand 137 states and 332 transitions. Second operand 13 states. [2019-12-27 19:05:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:54,147 INFO L93 Difference]: Finished difference Result 313 states and 706 transitions. [2019-12-27 19:05:54,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:05:54,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:54,148 INFO L225 Difference]: With dead ends: 313 [2019-12-27 19:05:54,148 INFO L226 Difference]: Without dead ends: 311 [2019-12-27 19:05:54,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:05:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-27 19:05:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 137. [2019-12-27 19:05:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 332 transitions. [2019-12-27 19:05:54,151 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 332 transitions. Word has length 18 [2019-12-27 19:05:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:54,151 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 332 transitions. [2019-12-27 19:05:54,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 332 transitions. [2019-12-27 19:05:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:54,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:54,152 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:54,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:54,352 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:54,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1959243941, now seen corresponding path program 186 times [2019-12-27 19:05:54,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:54,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193699523] [2019-12-27 19:05:54,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:54,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193699523] [2019-12-27 19:05:54,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276656600] [2019-12-27 19:05:54,478 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:54,599 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:05:54,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:54,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:54,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:05:54,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:54,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:54,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [163893528] [2019-12-27 19:05:54,647 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:54,649 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:54,652 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:05:54,652 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:54,652 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:05:54,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:54,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:54,654 INFO L87 Difference]: Start difference. First operand 137 states and 332 transitions. Second operand 13 states. [2019-12-27 19:05:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:55,102 INFO L93 Difference]: Finished difference Result 367 states and 822 transitions. [2019-12-27 19:05:55,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:05:55,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:55,103 INFO L225 Difference]: With dead ends: 367 [2019-12-27 19:05:55,103 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 19:05:55,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:05:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 19:05:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 136. [2019-12-27 19:05:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:05:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2019-12-27 19:05:55,109 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 18 [2019-12-27 19:05:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:55,110 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2019-12-27 19:05:55,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2019-12-27 19:05:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:55,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:55,111 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:55,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:55,314 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1040904811, now seen corresponding path program 187 times [2019-12-27 19:05:55,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:55,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40523797] [2019-12-27 19:05:55,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:55,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40523797] [2019-12-27 19:05:55,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473712413] [2019-12-27 19:05:55,451 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:55,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:55,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:05:55,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:55,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:55,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1463886671] [2019-12-27 19:05:55,597 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:55,598 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:55,601 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:55,601 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:55,602 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:05:55,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:55,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:55,603 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand 13 states. [2019-12-27 19:05:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:55,927 INFO L93 Difference]: Finished difference Result 376 states and 846 transitions. [2019-12-27 19:05:55,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:05:55,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:55,928 INFO L225 Difference]: With dead ends: 376 [2019-12-27 19:05:55,929 INFO L226 Difference]: Without dead ends: 374 [2019-12-27 19:05:55,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:05:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2019-12-27 19:05:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 135. [2019-12-27 19:05:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:05:55,933 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:05:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:55,933 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:05:55,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:05:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:55,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:55,934 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:56,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:56,137 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash 699159854, now seen corresponding path program 188 times [2019-12-27 19:05:56,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:56,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686750947] [2019-12-27 19:05:56,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:56,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686750947] [2019-12-27 19:05:56,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967821043] [2019-12-27 19:05:56,209 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:56,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:05:56,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:56,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:56,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:56,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:56,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:56,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1698610601] [2019-12-27 19:05:56,317 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:56,318 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:56,320 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:56,320 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:56,353 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:56,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:56,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:56,354 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 15 states. [2019-12-27 19:05:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:56,742 INFO L93 Difference]: Finished difference Result 394 states and 869 transitions. [2019-12-27 19:05:56,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:05:56,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:56,744 INFO L225 Difference]: With dead ends: 394 [2019-12-27 19:05:56,744 INFO L226 Difference]: Without dead ends: 392 [2019-12-27 19:05:56,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:05:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-27 19:05:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 137. [2019-12-27 19:05:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 19:05:56,747 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 19:05:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:56,747 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 19:05:56,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 19:05:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:56,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:56,747 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:56,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:56,948 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1657804443, now seen corresponding path program 189 times [2019-12-27 19:05:56,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:56,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030224085] [2019-12-27 19:05:56,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:57,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030224085] [2019-12-27 19:05:57,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475280092] [2019-12-27 19:05:57,047 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:57,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:05:57,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:57,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:57,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:05:57,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:57,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:57,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1050454257] [2019-12-27 19:05:57,145 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:57,146 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:57,147 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:05:57,147 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:57,148 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:05:57,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:57,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:57,148 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 19:05:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:57,426 INFO L93 Difference]: Finished difference Result 377 states and 839 transitions. [2019-12-27 19:05:57,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:05:57,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:57,427 INFO L225 Difference]: With dead ends: 377 [2019-12-27 19:05:57,427 INFO L226 Difference]: Without dead ends: 375 [2019-12-27 19:05:57,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:05:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-12-27 19:05:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 137. [2019-12-27 19:05:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:05:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 19:05:57,431 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 19:05:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:57,431 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 19:05:57,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 19:05:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:57,431 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:57,432 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:57,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:57,637 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 256759982, now seen corresponding path program 190 times [2019-12-27 19:05:57,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:57,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697145842] [2019-12-27 19:05:57,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:57,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697145842] [2019-12-27 19:05:57,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283675865] [2019-12-27 19:05:57,731 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:57,790 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:05:57,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:57,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:57,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:05:57,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:57,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:05:57,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [403847601] [2019-12-27 19:05:57,830 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:57,831 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:57,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:05:57,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:57,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:05:57,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:57,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:05:57,836 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 19:05:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:58,131 INFO L93 Difference]: Finished difference Result 393 states and 870 transitions. [2019-12-27 19:05:58,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:05:58,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:58,133 INFO L225 Difference]: With dead ends: 393 [2019-12-27 19:05:58,133 INFO L226 Difference]: Without dead ends: 391 [2019-12-27 19:05:58,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:05:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2019-12-27 19:05:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 134. [2019-12-27 19:05:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:05:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:05:58,137 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:05:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:58,138 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:05:58,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:05:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:58,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:58,138 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:58,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:58,342 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:58,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1540199192, now seen corresponding path program 191 times [2019-12-27 19:05:58,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:58,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449098544] [2019-12-27 19:05:58,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:58,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449098544] [2019-12-27 19:05:58,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800020894] [2019-12-27 19:05:58,440 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:58,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:05:58,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:58,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:05:58,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:05:58,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:58,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:05:58,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1204315262] [2019-12-27 19:05:58,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:58,549 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:58,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:05:58,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:58,583 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:05:58,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:05:58,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:58,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:05:58,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:05:58,585 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 19:05:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:58,998 INFO L93 Difference]: Finished difference Result 392 states and 869 transitions. [2019-12-27 19:05:58,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:05:58,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:05:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:58,999 INFO L225 Difference]: With dead ends: 392 [2019-12-27 19:05:58,999 INFO L226 Difference]: Without dead ends: 390 [2019-12-27 19:05:59,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:05:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-12-27 19:05:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 135. [2019-12-27 19:05:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:05:59,003 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:05:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:59,003 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:05:59,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:05:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:05:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:59,004 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:59,004 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:59,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:59,205 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash -581554603, now seen corresponding path program 192 times [2019-12-27 19:05:59,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:59,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793974472] [2019-12-27 19:05:59,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:59,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793974472] [2019-12-27 19:05:59,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262529576] [2019-12-27 19:05:59,274 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:59,341 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:05:59,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:05:59,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:05:59,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:05:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:05:59,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:05:59,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:05:59,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [931267595] [2019-12-27 19:05:59,368 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:05:59,369 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:05:59,370 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:05:59,370 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:05:59,371 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:05:59,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:05:59,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:05:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:05:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:05:59,371 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 19:05:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:05:59,650 INFO L93 Difference]: Finished difference Result 370 states and 829 transitions. [2019-12-27 19:05:59,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:05:59,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:05:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:05:59,652 INFO L225 Difference]: With dead ends: 370 [2019-12-27 19:05:59,652 INFO L226 Difference]: Without dead ends: 368 [2019-12-27 19:05:59,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:05:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2019-12-27 19:05:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 135. [2019-12-27 19:05:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:05:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:05:59,656 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:05:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:05:59,656 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:05:59,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:05:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:05:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:05:59,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:05:59,657 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:05:59,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:59,857 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:05:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:05:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1982599064, now seen corresponding path program 193 times [2019-12-27 19:05:59,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:05:59,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573050002] [2019-12-27 19:05:59,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:05:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:05:59,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573050002] [2019-12-27 19:05:59,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423049586] [2019-12-27 19:05:59,939 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:05:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:05:59,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:05:59,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:00,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:06:00,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1521512720] [2019-12-27 19:06:00,034 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:00,034 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:00,036 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:06:00,036 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:00,036 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:00,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:00,037 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 19:06:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:00,352 INFO L93 Difference]: Finished difference Result 387 states and 863 transitions. [2019-12-27 19:06:00,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:06:00,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:00,354 INFO L225 Difference]: With dead ends: 387 [2019-12-27 19:06:00,354 INFO L226 Difference]: Without dead ends: 385 [2019-12-27 19:06:00,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:06:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2019-12-27 19:06:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 134. [2019-12-27 19:06:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:06:00,358 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:06:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:00,358 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:06:00,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:06:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:00,358 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:00,358 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:00,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:00,559 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1064259934, now seen corresponding path program 194 times [2019-12-27 19:06:00,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:00,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652754077] [2019-12-27 19:06:00,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:00,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652754077] [2019-12-27 19:06:00,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807003917] [2019-12-27 19:06:00,627 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:00,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:00,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:00,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:00,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:00,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:00,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:06:00,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [596709781] [2019-12-27 19:06:00,722 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:00,723 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:00,724 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:06:00,725 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:00,725 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:00,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:00,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:00,725 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 19:06:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:01,038 INFO L93 Difference]: Finished difference Result 389 states and 868 transitions. [2019-12-27 19:06:01,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:06:01,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:01,039 INFO L225 Difference]: With dead ends: 389 [2019-12-27 19:06:01,039 INFO L226 Difference]: Without dead ends: 387 [2019-12-27 19:06:01,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:06:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2019-12-27 19:06:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 129. [2019-12-27 19:06:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:06:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-27 19:06:01,043 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 18 [2019-12-27 19:06:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:01,043 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-27 19:06:01,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-27 19:06:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:01,043 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:01,043 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:01,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:01,244 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -80334271, now seen corresponding path program 195 times [2019-12-27 19:06:01,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:01,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178199848] [2019-12-27 19:06:01,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:01,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178199848] [2019-12-27 19:06:01,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288624772] [2019-12-27 19:06:01,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:01,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:06:01,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:01,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:01,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:01,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:01,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:06:01,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [822694007] [2019-12-27 19:06:01,409 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:01,409 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:01,410 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 19:06:01,411 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:01,467 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:06:01,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:06:01,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:06:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:01,469 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 17 states. [2019-12-27 19:06:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:02,023 INFO L93 Difference]: Finished difference Result 412 states and 897 transitions. [2019-12-27 19:06:02,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:06:02,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 19:06:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:02,024 INFO L225 Difference]: With dead ends: 412 [2019-12-27 19:06:02,024 INFO L226 Difference]: Without dead ends: 410 [2019-12-27 19:06:02,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1436, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:06:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2019-12-27 19:06:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 134. [2019-12-27 19:06:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:06:02,028 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:06:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:02,028 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:06:02,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:06:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:06:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:02,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:02,029 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:02,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:02,229 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:02,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2054114414, now seen corresponding path program 196 times [2019-12-27 19:06:02,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:02,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630362877] [2019-12-27 19:06:02,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:02,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630362877] [2019-12-27 19:06:02,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473176266] [2019-12-27 19:06:02,305 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:02,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:02,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:02,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:02,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:02,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:02,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:06:02,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1352492861] [2019-12-27 19:06:02,399 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:02,399 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:02,401 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:06:02,401 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:02,426 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:06:02,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:06:02,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:02,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:06:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:02,427 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 19:06:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:02,831 INFO L93 Difference]: Finished difference Result 385 states and 848 transitions. [2019-12-27 19:06:02,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:06:02,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:06:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:02,832 INFO L225 Difference]: With dead ends: 385 [2019-12-27 19:06:02,833 INFO L226 Difference]: Without dead ends: 383 [2019-12-27 19:06:02,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=1169, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2019-12-27 19:06:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 135. [2019-12-27 19:06:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:06:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:06:02,837 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:06:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:02,837 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:06:02,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:06:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:06:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:02,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:02,837 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:03,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:03,038 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1282208293, now seen corresponding path program 197 times [2019-12-27 19:06:03,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:03,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803390702] [2019-12-27 19:06:03,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:03,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803390702] [2019-12-27 19:06:03,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677125006] [2019-12-27 19:06:03,112 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:03,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:06:03,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:03,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:03,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:06:03,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:03,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:06:03,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2115709432] [2019-12-27 19:06:03,200 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:03,201 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:03,203 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 19:06:03,203 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:03,204 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:03,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:03,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:06:03,204 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 19:06:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:03,474 INFO L93 Difference]: Finished difference Result 350 states and 775 transitions. [2019-12-27 19:06:03,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:06:03,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:03,475 INFO L225 Difference]: With dead ends: 350 [2019-12-27 19:06:03,476 INFO L226 Difference]: Without dead ends: 348 [2019-12-27 19:06:03,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:06:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-12-27 19:06:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 135. [2019-12-27 19:06:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:06:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 19:06:03,479 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 19:06:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:03,480 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 19:06:03,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 19:06:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:03,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:03,480 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:03,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:03,681 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1611714542, now seen corresponding path program 198 times [2019-12-27 19:06:03,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:03,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819391563] [2019-12-27 19:06:03,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:03,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819391563] [2019-12-27 19:06:03,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129462793] [2019-12-27 19:06:03,748 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:03,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:06:03,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:03,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:03,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:03,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:03,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:06:03,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [766070678] [2019-12-27 19:06:03,849 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:03,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:03,851 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:06:03,851 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:03,851 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:03,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:03,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:03,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:03,852 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 19:06:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:04,191 INFO L93 Difference]: Finished difference Result 386 states and 851 transitions. [2019-12-27 19:06:04,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:06:04,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:04,192 INFO L225 Difference]: With dead ends: 386 [2019-12-27 19:06:04,192 INFO L226 Difference]: Without dead ends: 384 [2019-12-27 19:06:04,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-12-27 19:06:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 134. [2019-12-27 19:06:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:06:04,196 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:06:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:04,197 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:06:04,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:06:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:04,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:04,197 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:04,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:04,398 INFO L410 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:04,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1764913624, now seen corresponding path program 199 times [2019-12-27 19:06:04,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:04,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282959835] [2019-12-27 19:06:04,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:04,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282959835] [2019-12-27 19:06:04,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137006948] [2019-12-27 19:06:04,475 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:04,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:04,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:04,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:04,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 19:06:04,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366426404] [2019-12-27 19:06:04,566 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:04,566 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:04,568 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:06:04,568 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:04,568 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:04,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:04,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:04,569 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 19:06:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:04,893 INFO L93 Difference]: Finished difference Result 390 states and 863 transitions. [2019-12-27 19:06:04,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:06:04,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:04,894 INFO L225 Difference]: With dead ends: 390 [2019-12-27 19:06:04,895 INFO L226 Difference]: Without dead ends: 388 [2019-12-27 19:06:04,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2019-12-27 19:06:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 131. [2019-12-27 19:06:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:06:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 309 transitions. [2019-12-27 19:06:04,898 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 309 transitions. Word has length 18 [2019-12-27 19:06:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:04,899 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 309 transitions. [2019-12-27 19:06:04,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 309 transitions. [2019-12-27 19:06:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:04,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:04,899 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:05,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:05,100 INFO L410 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash -24848959, now seen corresponding path program 200 times [2019-12-27 19:06:05,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:05,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87798475] [2019-12-27 19:06:05,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:05,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87798475] [2019-12-27 19:06:05,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685678264] [2019-12-27 19:06:05,167 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:05,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:05,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:05,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:05,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:05,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:05,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 19:06:05,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152723779] [2019-12-27 19:06:05,254 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:05,254 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:05,256 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 19:06:05,256 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:05,296 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:06:05,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:06:05,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:06:05,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:05,297 INFO L87 Difference]: Start difference. First operand 131 states and 309 transitions. Second operand 15 states. [2019-12-27 19:06:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:05,683 INFO L93 Difference]: Finished difference Result 405 states and 880 transitions. [2019-12-27 19:06:05,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:06:05,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 19:06:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:05,685 INFO L225 Difference]: With dead ends: 405 [2019-12-27 19:06:05,685 INFO L226 Difference]: Without dead ends: 403 [2019-12-27 19:06:05,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=474, Invalid=1086, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:06:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-12-27 19:06:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 134. [2019-12-27 19:06:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 19:06:05,688 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 19:06:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:05,689 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 19:06:05,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:06:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 19:06:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:05,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:05,689 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:05,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:05,890 INFO L410 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash 933795630, now seen corresponding path program 201 times [2019-12-27 19:06:05,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:05,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679373028] [2019-12-27 19:06:05,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:05,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679373028] [2019-12-27 19:06:05,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639300736] [2019-12-27 19:06:05,972 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:06,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:06:06,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:06,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:06,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:06,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:06,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:06:06,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838996195] [2019-12-27 19:06:06,076 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:06,077 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:06,079 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:06:06,079 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:06,080 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:06,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:06,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:06,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:06,081 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 19:06:06,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:06,464 INFO L93 Difference]: Finished difference Result 388 states and 846 transitions. [2019-12-27 19:06:06,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:06:06,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:06,466 INFO L225 Difference]: With dead ends: 388 [2019-12-27 19:06:06,466 INFO L226 Difference]: Without dead ends: 386 [2019-12-27 19:06:06,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:06:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-12-27 19:06:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 133. [2019-12-27 19:06:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:06:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 19:06:06,469 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 19:06:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:06,469 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 19:06:06,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 19:06:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:06:06,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:06,470 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:06,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:06,671 INFO L410 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:06,671 INFO L82 PathProgramCache]: Analyzing trace with hash -467248831, now seen corresponding path program 202 times [2019-12-27 19:06:06,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:06,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483069466] [2019-12-27 19:06:06,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:06,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483069466] [2019-12-27 19:06:06,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887952594] [2019-12-27 19:06:06,739 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:06,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:06,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:06,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:06,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:06,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:06,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 19:06:06,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1705937539] [2019-12-27 19:06:06,839 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:06,840 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:06,842 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:06:06,842 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:06,842 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:06:06,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:06:06,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:06:06,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:06,843 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 19:06:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:07,153 INFO L93 Difference]: Finished difference Result 404 states and 879 transitions. [2019-12-27 19:06:07,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:06:07,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 19:06:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:07,154 INFO L225 Difference]: With dead ends: 404 [2019-12-27 19:06:07,154 INFO L226 Difference]: Without dead ends: 402 [2019-12-27 19:06:07,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:06:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2019-12-27 19:06:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 122. [2019-12-27 19:06:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-27 19:06:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 283 transitions. [2019-12-27 19:06:07,157 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 283 transitions. Word has length 18 [2019-12-27 19:06:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:07,157 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 283 transitions. [2019-12-27 19:06:07,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:06:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 283 transitions. [2019-12-27 19:06:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:07,158 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:07,158 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:07,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:07,359 INFO L410 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash 729250308, now seen corresponding path program 203 times [2019-12-27 19:06:07,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:07,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547604590] [2019-12-27 19:06:07,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:07,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547604590] [2019-12-27 19:06:07,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453752608] [2019-12-27 19:06:07,457 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:07,510 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:06:07,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:07,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:07,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 19:06:07,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:07,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:07,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784553571] [2019-12-27 19:06:07,585 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:07,585 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:07,587 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:07,588 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:07,588 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:07,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:07,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:07,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:07,588 INFO L87 Difference]: Start difference. First operand 122 states and 283 transitions. Second operand 14 states. [2019-12-27 19:06:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:08,046 INFO L93 Difference]: Finished difference Result 473 states and 985 transitions. [2019-12-27 19:06:08,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:06:08,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:08,048 INFO L225 Difference]: With dead ends: 473 [2019-12-27 19:06:08,048 INFO L226 Difference]: Without dead ends: 471 [2019-12-27 19:06:08,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:06:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-12-27 19:06:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 124. [2019-12-27 19:06:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:06:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 290 transitions. [2019-12-27 19:06:08,051 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 290 transitions. Word has length 19 [2019-12-27 19:06:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:08,051 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 290 transitions. [2019-12-27 19:06:08,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 290 transitions. [2019-12-27 19:06:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:08,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:08,052 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:08,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:08,255 INFO L410 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1729043382, now seen corresponding path program 204 times [2019-12-27 19:06:08,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:08,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516459755] [2019-12-27 19:06:08,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:08,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516459755] [2019-12-27 19:06:08,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658734425] [2019-12-27 19:06:08,330 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:08,397 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 19:06:08,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:08,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:08,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:08,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:08,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:08,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1293079349] [2019-12-27 19:06:08,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:08,433 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:08,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:08,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:08,464 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:08,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:08,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:08,465 INFO L87 Difference]: Start difference. First operand 124 states and 290 transitions. Second operand 16 states. [2019-12-27 19:06:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:08,996 INFO L93 Difference]: Finished difference Result 449 states and 950 transitions. [2019-12-27 19:06:08,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:06:08,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:08,998 INFO L225 Difference]: With dead ends: 449 [2019-12-27 19:06:08,998 INFO L226 Difference]: Without dead ends: 447 [2019-12-27 19:06:08,998 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=696, Invalid=1656, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:06:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-12-27 19:06:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 128. [2019-12-27 19:06:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:06:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 305 transitions. [2019-12-27 19:06:09,002 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 305 transitions. Word has length 19 [2019-12-27 19:06:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:09,002 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 305 transitions. [2019-12-27 19:06:09,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 305 transitions. [2019-12-27 19:06:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:09,003 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:09,003 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:09,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:09,203 INFO L410 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -770398793, now seen corresponding path program 205 times [2019-12-27 19:06:09,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:09,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428082729] [2019-12-27 19:06:09,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:09,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428082729] [2019-12-27 19:06:09,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311947451] [2019-12-27 19:06:09,293 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:09,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:09,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:06:09,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:09,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:09,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [630899353] [2019-12-27 19:06:09,389 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:09,390 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:09,393 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:09,393 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:09,393 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:09,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:09,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:09,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:09,394 INFO L87 Difference]: Start difference. First operand 128 states and 305 transitions. Second operand 14 states. [2019-12-27 19:06:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:09,815 INFO L93 Difference]: Finished difference Result 423 states and 894 transitions. [2019-12-27 19:06:09,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:09,816 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:09,817 INFO L225 Difference]: With dead ends: 423 [2019-12-27 19:06:09,817 INFO L226 Difference]: Without dead ends: 421 [2019-12-27 19:06:09,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-12-27 19:06:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 127. [2019-12-27 19:06:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:06:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 301 transitions. [2019-12-27 19:06:09,821 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 301 transitions. Word has length 19 [2019-12-27 19:06:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:09,821 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 301 transitions. [2019-12-27 19:06:09,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 301 transitions. [2019-12-27 19:06:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:09,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:09,822 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:10,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:10,022 INFO L410 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:10,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2123524042, now seen corresponding path program 206 times [2019-12-27 19:06:10,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:10,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880564098] [2019-12-27 19:06:10,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:10,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880564098] [2019-12-27 19:06:10,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666642020] [2019-12-27 19:06:10,098 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:10,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:10,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:10,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:10,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:10,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:10,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:10,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [801402256] [2019-12-27 19:06:10,200 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:10,201 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:10,202 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:06:10,203 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:10,203 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:10,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:10,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:10,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:10,203 INFO L87 Difference]: Start difference. First operand 127 states and 301 transitions. Second operand 14 states. [2019-12-27 19:06:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:10,677 INFO L93 Difference]: Finished difference Result 448 states and 954 transitions. [2019-12-27 19:06:10,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:06:10,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:10,678 INFO L225 Difference]: With dead ends: 448 [2019-12-27 19:06:10,678 INFO L226 Difference]: Without dead ends: 446 [2019-12-27 19:06:10,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:06:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2019-12-27 19:06:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 126. [2019-12-27 19:06:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:06:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 297 transitions. [2019-12-27 19:06:10,683 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 297 transitions. Word has length 19 [2019-12-27 19:06:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:10,683 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 297 transitions. [2019-12-27 19:06:10,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 297 transitions. [2019-12-27 19:06:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:10,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:10,684 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:10,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:10,887 INFO L410 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1253104124, now seen corresponding path program 207 times [2019-12-27 19:06:10,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:10,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144552328] [2019-12-27 19:06:10,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:10,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144552328] [2019-12-27 19:06:10,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296134171] [2019-12-27 19:06:10,966 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:11,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:06:11,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:11,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:11,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:11,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:11,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:11,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1561690849] [2019-12-27 19:06:11,062 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:11,063 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:11,065 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:11,065 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:11,065 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:11,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:11,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:11,065 INFO L87 Difference]: Start difference. First operand 126 states and 297 transitions. Second operand 14 states. [2019-12-27 19:06:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:11,521 INFO L93 Difference]: Finished difference Result 457 states and 968 transitions. [2019-12-27 19:06:11,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:06:11,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:11,523 INFO L225 Difference]: With dead ends: 457 [2019-12-27 19:06:11,523 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 19:06:11,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:06:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 19:06:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 128. [2019-12-27 19:06:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:06:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 302 transitions. [2019-12-27 19:06:11,527 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 302 transitions. Word has length 19 [2019-12-27 19:06:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:11,527 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 302 transitions. [2019-12-27 19:06:11,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 302 transitions. [2019-12-27 19:06:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:11,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:11,527 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:11,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:11,728 INFO L410 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1917266672, now seen corresponding path program 208 times [2019-12-27 19:06:11,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:11,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442004276] [2019-12-27 19:06:11,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:11,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442004276] [2019-12-27 19:06:11,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289168563] [2019-12-27 19:06:11,806 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:11,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:11,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:11,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:11,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:11,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:11,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:11,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [207769806] [2019-12-27 19:06:11,911 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:11,911 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:11,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:11,913 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:11,973 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:06:11,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:06:11,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:06:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:06:11,974 INFO L87 Difference]: Start difference. First operand 128 states and 302 transitions. Second operand 18 states. [2019-12-27 19:06:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:12,645 INFO L93 Difference]: Finished difference Result 454 states and 977 transitions. [2019-12-27 19:06:12,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 19:06:12,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:06:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:12,647 INFO L225 Difference]: With dead ends: 454 [2019-12-27 19:06:12,647 INFO L226 Difference]: Without dead ends: 452 [2019-12-27 19:06:12,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 19:06:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-12-27 19:06:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 134. [2019-12-27 19:06:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2019-12-27 19:06:12,652 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 19 [2019-12-27 19:06:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:12,652 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2019-12-27 19:06:12,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:06:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2019-12-27 19:06:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:12,652 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:12,653 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:12,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:12,856 INFO L410 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 217182013, now seen corresponding path program 209 times [2019-12-27 19:06:12,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:12,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146047472] [2019-12-27 19:06:12,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:12,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146047472] [2019-12-27 19:06:12,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449379004] [2019-12-27 19:06:12,953 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:12,999 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:06:12,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:13,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:13,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:13,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:13,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:13,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578953224] [2019-12-27 19:06:13,059 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:13,060 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:13,062 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:13,062 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:13,092 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:13,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:13,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:13,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:06:13,093 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand 16 states. [2019-12-27 19:06:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:13,632 INFO L93 Difference]: Finished difference Result 413 states and 893 transitions. [2019-12-27 19:06:13,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:06:13,632 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:13,633 INFO L225 Difference]: With dead ends: 413 [2019-12-27 19:06:13,633 INFO L226 Difference]: Without dead ends: 411 [2019-12-27 19:06:13,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:06:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2019-12-27 19:06:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 135. [2019-12-27 19:06:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:06:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 328 transitions. [2019-12-27 19:06:13,637 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 328 transitions. Word has length 19 [2019-12-27 19:06:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:13,637 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 328 transitions. [2019-12-27 19:06:13,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 328 transitions. [2019-12-27 19:06:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:13,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:13,637 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:13,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:13,838 INFO L410 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1175826602, now seen corresponding path program 210 times [2019-12-27 19:06:13,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:13,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135545668] [2019-12-27 19:06:13,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:13,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135545668] [2019-12-27 19:06:13,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078317664] [2019-12-27 19:06:13,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:13,983 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:13,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:13,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:13,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 19:06:14,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:14,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:14,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1066930767] [2019-12-27 19:06:14,010 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:14,011 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:14,013 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:14,013 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:14,014 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:14,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:14,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:14,014 INFO L87 Difference]: Start difference. First operand 135 states and 328 transitions. Second operand 14 states. [2019-12-27 19:06:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:14,349 INFO L93 Difference]: Finished difference Result 369 states and 802 transitions. [2019-12-27 19:06:14,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:14,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:14,350 INFO L225 Difference]: With dead ends: 369 [2019-12-27 19:06:14,350 INFO L226 Difference]: Without dead ends: 367 [2019-12-27 19:06:14,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-12-27 19:06:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 135. [2019-12-27 19:06:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:06:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 328 transitions. [2019-12-27 19:06:14,354 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 328 transitions. Word has length 19 [2019-12-27 19:06:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:14,354 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 328 transitions. [2019-12-27 19:06:14,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 328 transitions. [2019-12-27 19:06:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:14,354 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:14,354 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:14,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:14,555 INFO L410 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -225217859, now seen corresponding path program 211 times [2019-12-27 19:06:14,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:14,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081653282] [2019-12-27 19:06:14,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:14,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081653282] [2019-12-27 19:06:14,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191988724] [2019-12-27 19:06:14,640 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:14,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:14,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:14,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:14,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:14,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2028977510] [2019-12-27 19:06:14,735 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:14,735 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:14,737 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:06:14,737 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:14,737 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:14,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:14,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:14,738 INFO L87 Difference]: Start difference. First operand 135 states and 328 transitions. Second operand 14 states. [2019-12-27 19:06:15,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:15,157 INFO L93 Difference]: Finished difference Result 414 states and 905 transitions. [2019-12-27 19:06:15,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:15,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:15,159 INFO L225 Difference]: With dead ends: 414 [2019-12-27 19:06:15,159 INFO L226 Difference]: Without dead ends: 412 [2019-12-27 19:06:15,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2019-12-27 19:06:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 134. [2019-12-27 19:06:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2019-12-27 19:06:15,163 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 19 [2019-12-27 19:06:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:15,163 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2019-12-27 19:06:15,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2019-12-27 19:06:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:15,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:15,163 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:15,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:15,364 INFO L410 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:15,364 INFO L82 PathProgramCache]: Analyzing trace with hash 693121271, now seen corresponding path program 212 times [2019-12-27 19:06:15,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:15,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007538397] [2019-12-27 19:06:15,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:15,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007538397] [2019-12-27 19:06:15,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755234333] [2019-12-27 19:06:15,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:15,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:15,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:15,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:15,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:15,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:15,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:15,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1277059942] [2019-12-27 19:06:15,538 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:15,539 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:15,541 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:15,541 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:15,541 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:15,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:15,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:15,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:15,541 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand 14 states. [2019-12-27 19:06:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:15,967 INFO L93 Difference]: Finished difference Result 417 states and 909 transitions. [2019-12-27 19:06:15,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:15,967 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:15,968 INFO L225 Difference]: With dead ends: 417 [2019-12-27 19:06:15,968 INFO L226 Difference]: Without dead ends: 415 [2019-12-27 19:06:15,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-12-27 19:06:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 131. [2019-12-27 19:06:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:06:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 313 transitions. [2019-12-27 19:06:15,973 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 313 transitions. Word has length 19 [2019-12-27 19:06:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:15,973 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 313 transitions. [2019-12-27 19:06:15,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 313 transitions. [2019-12-27 19:06:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:15,973 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:15,973 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:16,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:16,174 INFO L410 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:16,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1861781360, now seen corresponding path program 213 times [2019-12-27 19:06:16,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:16,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807993035] [2019-12-27 19:06:16,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:16,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807993035] [2019-12-27 19:06:16,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456297683] [2019-12-27 19:06:16,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:16,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:06:16,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:16,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:16,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:16,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:16,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:16,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1640114072] [2019-12-27 19:06:16,362 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:16,363 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:16,365 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:16,365 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:16,392 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:16,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:16,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:06:16,392 INFO L87 Difference]: Start difference. First operand 131 states and 313 transitions. Second operand 16 states. [2019-12-27 19:06:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:16,901 INFO L93 Difference]: Finished difference Result 439 states and 951 transitions. [2019-12-27 19:06:16,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:06:16,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:16,902 INFO L225 Difference]: With dead ends: 439 [2019-12-27 19:06:16,902 INFO L226 Difference]: Without dead ends: 437 [2019-12-27 19:06:16,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=639, Invalid=1617, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:06:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-12-27 19:06:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 134. [2019-12-27 19:06:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2019-12-27 19:06:16,906 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 19 [2019-12-27 19:06:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:16,906 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2019-12-27 19:06:16,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2019-12-27 19:06:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:16,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:16,907 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:17,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:17,108 INFO L410 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash -903136771, now seen corresponding path program 214 times [2019-12-27 19:06:17,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:17,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771380424] [2019-12-27 19:06:17,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:17,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771380424] [2019-12-27 19:06:17,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787102917] [2019-12-27 19:06:17,202 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:17,292 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:17,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:17,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:17,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:17,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:17,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:17,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [338757342] [2019-12-27 19:06:17,374 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:17,376 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:17,380 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:06:17,380 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:17,380 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:17,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:17,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:17,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:17,381 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand 14 states. [2019-12-27 19:06:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:17,844 INFO L93 Difference]: Finished difference Result 424 states and 920 transitions. [2019-12-27 19:06:17,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:17,844 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:17,845 INFO L225 Difference]: With dead ends: 424 [2019-12-27 19:06:17,845 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 19:06:17,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 19:06:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 133. [2019-12-27 19:06:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:06:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 320 transitions. [2019-12-27 19:06:17,849 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 320 transitions. Word has length 19 [2019-12-27 19:06:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:17,850 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 320 transitions. [2019-12-27 19:06:17,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 320 transitions. [2019-12-27 19:06:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:17,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:17,850 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:18,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:18,051 INFO L410 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:18,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1990786064, now seen corresponding path program 215 times [2019-12-27 19:06:18,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:18,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434079013] [2019-12-27 19:06:18,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:18,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434079013] [2019-12-27 19:06:18,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834836678] [2019-12-27 19:06:18,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:18,180 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:06:18,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:18,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:18,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:06:18,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:18,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:18,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1587981413] [2019-12-27 19:06:18,220 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:18,221 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:18,223 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:06:18,223 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:18,223 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:18,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:18,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:18,224 INFO L87 Difference]: Start difference. First operand 133 states and 320 transitions. Second operand 14 states. [2019-12-27 19:06:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:18,643 INFO L93 Difference]: Finished difference Result 442 states and 963 transitions. [2019-12-27 19:06:18,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:18,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:18,644 INFO L225 Difference]: With dead ends: 442 [2019-12-27 19:06:18,644 INFO L226 Difference]: Without dead ends: 440 [2019-12-27 19:06:18,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-12-27 19:06:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 130. [2019-12-27 19:06:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:06:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 309 transitions. [2019-12-27 19:06:18,649 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 309 transitions. Word has length 19 [2019-12-27 19:06:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:18,649 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 309 transitions. [2019-12-27 19:06:18,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 309 transitions. [2019-12-27 19:06:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:18,649 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:18,649 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:18,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:18,850 INFO L410 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash 193826890, now seen corresponding path program 216 times [2019-12-27 19:06:18,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:18,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260871727] [2019-12-27 19:06:18,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:18,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260871727] [2019-12-27 19:06:18,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174706415] [2019-12-27 19:06:18,924 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:18,988 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:06:18,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:18,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:18,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:19,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:19,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:19,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351636342] [2019-12-27 19:06:19,024 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:19,025 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:19,027 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:19,027 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:19,056 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:19,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:19,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:19,057 INFO L87 Difference]: Start difference. First operand 130 states and 309 transitions. Second operand 16 states. [2019-12-27 19:06:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:19,599 INFO L93 Difference]: Finished difference Result 443 states and 954 transitions. [2019-12-27 19:06:19,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:06:19,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:19,600 INFO L225 Difference]: With dead ends: 443 [2019-12-27 19:06:19,600 INFO L226 Difference]: Without dead ends: 441 [2019-12-27 19:06:19,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=671, Invalid=1585, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:06:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-12-27 19:06:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 136. [2019-12-27 19:06:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:06:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 329 transitions. [2019-12-27 19:06:19,604 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 329 transitions. Word has length 19 [2019-12-27 19:06:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:19,605 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 329 transitions. [2019-12-27 19:06:19,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 329 transitions. [2019-12-27 19:06:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:19,605 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:19,605 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:19,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:19,809 INFO L410 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1152471479, now seen corresponding path program 217 times [2019-12-27 19:06:19,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:19,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377855885] [2019-12-27 19:06:19,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:19,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377855885] [2019-12-27 19:06:19,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142375714] [2019-12-27 19:06:19,885 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:19,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:19,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:06:19,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:19,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:19,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1818174042] [2019-12-27 19:06:19,980 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:19,981 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:19,983 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:19,983 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:19,984 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:19,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:19,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:19,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:19,984 INFO L87 Difference]: Start difference. First operand 136 states and 329 transitions. Second operand 14 states. [2019-12-27 19:06:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:20,419 INFO L93 Difference]: Finished difference Result 424 states and 914 transitions. [2019-12-27 19:06:20,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:20,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:20,420 INFO L225 Difference]: With dead ends: 424 [2019-12-27 19:06:20,420 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 19:06:20,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 19:06:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 135. [2019-12-27 19:06:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:06:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 325 transitions. [2019-12-27 19:06:20,425 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 325 transitions. Word has length 19 [2019-12-27 19:06:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:20,425 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 325 transitions. [2019-12-27 19:06:20,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 325 transitions. [2019-12-27 19:06:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:20,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:20,426 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:20,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:20,626 INFO L410 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash -248572982, now seen corresponding path program 218 times [2019-12-27 19:06:20,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:20,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716637748] [2019-12-27 19:06:20,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:20,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716637748] [2019-12-27 19:06:20,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427227170] [2019-12-27 19:06:20,704 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:20,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:20,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:20,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:20,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:20,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:20,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:20,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [11094697] [2019-12-27 19:06:20,811 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:20,812 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:20,815 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:06:20,815 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:20,815 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:20,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:20,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:20,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:20,816 INFO L87 Difference]: Start difference. First operand 135 states and 325 transitions. Second operand 14 states. [2019-12-27 19:06:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:21,297 INFO L93 Difference]: Finished difference Result 440 states and 951 transitions. [2019-12-27 19:06:21,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:06:21,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:21,299 INFO L225 Difference]: With dead ends: 440 [2019-12-27 19:06:21,299 INFO L226 Difference]: Without dead ends: 438 [2019-12-27 19:06:21,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:06:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-12-27 19:06:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 134. [2019-12-27 19:06:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:06:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 321 transitions. [2019-12-27 19:06:21,303 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 321 transitions. Word has length 19 [2019-12-27 19:06:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:21,303 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 321 transitions. [2019-12-27 19:06:21,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 321 transitions. [2019-12-27 19:06:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:21,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:21,303 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:21,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:21,504 INFO L410 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 669766148, now seen corresponding path program 219 times [2019-12-27 19:06:21,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:21,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907228847] [2019-12-27 19:06:21,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:21,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907228847] [2019-12-27 19:06:21,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305856051] [2019-12-27 19:06:21,582 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:21,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:06:21,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:21,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:21,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:21,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:21,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:21,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [209632346] [2019-12-27 19:06:21,693 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:21,694 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:21,695 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:21,695 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:21,696 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:21,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:21,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:21,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:21,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:21,696 INFO L87 Difference]: Start difference. First operand 134 states and 321 transitions. Second operand 14 states. [2019-12-27 19:06:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:22,169 INFO L93 Difference]: Finished difference Result 451 states and 973 transitions. [2019-12-27 19:06:22,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:06:22,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:22,170 INFO L225 Difference]: With dead ends: 451 [2019-12-27 19:06:22,170 INFO L226 Difference]: Without dead ends: 449 [2019-12-27 19:06:22,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:06:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2019-12-27 19:06:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 132. [2019-12-27 19:06:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-27 19:06:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 314 transitions. [2019-12-27 19:06:22,175 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 314 transitions. Word has length 19 [2019-12-27 19:06:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:22,175 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 314 transitions. [2019-12-27 19:06:22,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 314 transitions. [2019-12-27 19:06:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:22,175 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:22,175 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:22,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:22,376 INFO L410 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1883745366, now seen corresponding path program 220 times [2019-12-27 19:06:22,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:22,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638179633] [2019-12-27 19:06:22,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:22,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638179633] [2019-12-27 19:06:22,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409366509] [2019-12-27 19:06:22,447 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:22,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:22,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:22,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:22,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:22,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:22,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:22,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015501282] [2019-12-27 19:06:22,550 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:22,551 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:22,553 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:22,553 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:22,643 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:06:22,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:06:22,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:06:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:06:22,644 INFO L87 Difference]: Start difference. First operand 132 states and 314 transitions. Second operand 20 states. [2019-12-27 19:06:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:23,491 INFO L93 Difference]: Finished difference Result 478 states and 1055 transitions. [2019-12-27 19:06:23,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-27 19:06:23,491 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 19:06:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:23,492 INFO L225 Difference]: With dead ends: 478 [2019-12-27 19:06:23,493 INFO L226 Difference]: Without dead ends: 476 [2019-12-27 19:06:23,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=983, Invalid=2557, Unknown=0, NotChecked=0, Total=3540 [2019-12-27 19:06:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2019-12-27 19:06:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 140. [2019-12-27 19:06:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 19:06:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 343 transitions. [2019-12-27 19:06:23,497 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 343 transitions. Word has length 19 [2019-12-27 19:06:23,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:23,497 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 343 transitions. [2019-12-27 19:06:23,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:06:23,497 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 343 transitions. [2019-12-27 19:06:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:23,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:23,498 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:23,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:23,698 INFO L410 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash 94564163, now seen corresponding path program 221 times [2019-12-27 19:06:23,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:23,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885922467] [2019-12-27 19:06:23,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:23,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885922467] [2019-12-27 19:06:23,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251723940] [2019-12-27 19:06:23,777 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:23,822 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:06:23,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:23,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:23,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:06:23,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:23,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:23,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117893776] [2019-12-27 19:06:23,879 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:23,880 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:23,882 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:23,882 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:23,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:06:23,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:06:23,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:06:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:06:23,948 INFO L87 Difference]: Start difference. First operand 140 states and 343 transitions. Second operand 18 states. [2019-12-27 19:06:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:24,562 INFO L93 Difference]: Finished difference Result 437 states and 977 transitions. [2019-12-27 19:06:24,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:06:24,563 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:06:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:24,564 INFO L225 Difference]: With dead ends: 437 [2019-12-27 19:06:24,564 INFO L226 Difference]: Without dead ends: 435 [2019-12-27 19:06:24,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=744, Invalid=1806, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 19:06:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-12-27 19:06:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 141. [2019-12-27 19:06:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:06:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 347 transitions. [2019-12-27 19:06:24,568 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 347 transitions. Word has length 19 [2019-12-27 19:06:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:24,568 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 347 transitions. [2019-12-27 19:06:24,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:06:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 347 transitions. [2019-12-27 19:06:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:24,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:24,569 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:24,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:24,770 INFO L410 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2065954448, now seen corresponding path program 222 times [2019-12-27 19:06:24,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:24,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560156262] [2019-12-27 19:06:24,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:24,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560156262] [2019-12-27 19:06:24,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031081224] [2019-12-27 19:06:24,848 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:24,912 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:24,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:24,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:24,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 19:06:24,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:24,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:24,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1560630236] [2019-12-27 19:06:24,938 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:24,939 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:24,941 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:24,941 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:24,968 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:24,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:24,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:24,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:24,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:24,969 INFO L87 Difference]: Start difference. First operand 141 states and 347 transitions. Second operand 16 states. [2019-12-27 19:06:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:25,373 INFO L93 Difference]: Finished difference Result 380 states and 860 transitions. [2019-12-27 19:06:25,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:06:25,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:25,374 INFO L225 Difference]: With dead ends: 380 [2019-12-27 19:06:25,374 INFO L226 Difference]: Without dead ends: 378 [2019-12-27 19:06:25,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-12-27 19:06:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 143. [2019-12-27 19:06:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 355 transitions. [2019-12-27 19:06:25,378 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 355 transitions. Word has length 19 [2019-12-27 19:06:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:25,378 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 355 transitions. [2019-12-27 19:06:25,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 355 transitions. [2019-12-27 19:06:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:25,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:25,379 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:25,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:25,579 INFO L410 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1107309859, now seen corresponding path program 223 times [2019-12-27 19:06:25,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:25,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181847987] [2019-12-27 19:06:25,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:25,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181847987] [2019-12-27 19:06:25,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046064490] [2019-12-27 19:06:25,665 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:25,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:06:25,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-27 19:06:25,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:25,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:06:25,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1927083073] [2019-12-27 19:06:25,745 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:25,746 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:25,748 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:25,748 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:25,748 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:25,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:25,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:06:25,748 INFO L87 Difference]: Start difference. First operand 143 states and 355 transitions. Second operand 14 states. [2019-12-27 19:06:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:25,978 INFO L93 Difference]: Finished difference Result 321 states and 733 transitions. [2019-12-27 19:06:25,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:06:25,978 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:25,979 INFO L225 Difference]: With dead ends: 321 [2019-12-27 19:06:25,979 INFO L226 Difference]: Without dead ends: 319 [2019-12-27 19:06:25,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:06:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-12-27 19:06:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 144. [2019-12-27 19:06:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:06:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2019-12-27 19:06:25,983 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 19 [2019-12-27 19:06:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:25,983 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2019-12-27 19:06:25,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2019-12-27 19:06:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:25,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:25,984 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:26,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:26,185 INFO L410 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1786612976, now seen corresponding path program 224 times [2019-12-27 19:06:26,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:26,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251381814] [2019-12-27 19:06:26,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:26,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251381814] [2019-12-27 19:06:26,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632316502] [2019-12-27 19:06:26,267 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:26,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:26,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:26,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:26,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:06:26,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:26,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:26,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1115380738] [2019-12-27 19:06:26,360 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:26,361 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:26,363 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:26,363 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:26,363 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:26,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:26,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:26,364 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 14 states. [2019-12-27 19:06:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:26,702 INFO L93 Difference]: Finished difference Result 394 states and 897 transitions. [2019-12-27 19:06:26,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:26,703 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:26,704 INFO L225 Difference]: With dead ends: 394 [2019-12-27 19:06:26,704 INFO L226 Difference]: Without dead ends: 392 [2019-12-27 19:06:26,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-27 19:06:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 143. [2019-12-27 19:06:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2019-12-27 19:06:26,709 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 19 [2019-12-27 19:06:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:26,709 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2019-12-27 19:06:26,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2019-12-27 19:06:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:26,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:26,709 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:26,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:26,910 INFO L410 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:26,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1590015190, now seen corresponding path program 225 times [2019-12-27 19:06:26,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:26,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873664923] [2019-12-27 19:06:26,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:26,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873664923] [2019-12-27 19:06:26,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521758446] [2019-12-27 19:06:26,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:27,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:06:27,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:27,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:27,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:06:27,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:27,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:27,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [363756259] [2019-12-27 19:06:27,082 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:27,083 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:27,085 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:27,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:27,085 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:27,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:27,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:27,086 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 14 states. [2019-12-27 19:06:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:27,420 INFO L93 Difference]: Finished difference Result 403 states and 917 transitions. [2019-12-27 19:06:27,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:27,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:27,422 INFO L225 Difference]: With dead ends: 403 [2019-12-27 19:06:27,422 INFO L226 Difference]: Without dead ends: 401 [2019-12-27 19:06:27,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-12-27 19:06:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 142. [2019-12-27 19:06:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:06:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 19:06:27,426 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 19:06:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:27,426 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 19:06:27,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 19:06:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:27,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:27,426 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:27,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:27,627 INFO L410 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:27,627 INFO L82 PathProgramCache]: Analyzing trace with hash 150049475, now seen corresponding path program 226 times [2019-12-27 19:06:27,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:27,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769660075] [2019-12-27 19:06:27,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:27,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769660075] [2019-12-27 19:06:27,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481317949] [2019-12-27 19:06:27,709 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:27,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:27,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:27,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:27,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:27,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:27,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:27,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [779077157] [2019-12-27 19:06:27,808 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:27,809 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:27,810 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:27,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:27,850 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:27,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:27,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:27,851 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 16 states. [2019-12-27 19:06:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:28,313 INFO L93 Difference]: Finished difference Result 437 states and 986 transitions. [2019-12-27 19:06:28,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:28,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:28,314 INFO L225 Difference]: With dead ends: 437 [2019-12-27 19:06:28,314 INFO L226 Difference]: Without dead ends: 435 [2019-12-27 19:06:28,315 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=529, Invalid=1277, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:06:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-12-27 19:06:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 144. [2019-12-27 19:06:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:06:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 355 transitions. [2019-12-27 19:06:28,318 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 355 transitions. Word has length 19 [2019-12-27 19:06:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:28,318 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 355 transitions. [2019-12-27 19:06:28,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 355 transitions. [2019-12-27 19:06:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:28,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:28,319 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:28,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:28,519 INFO L410 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1108694064, now seen corresponding path program 227 times [2019-12-27 19:06:28,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:28,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583475427] [2019-12-27 19:06:28,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:28,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583475427] [2019-12-27 19:06:28,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229270958] [2019-12-27 19:06:28,628 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:28,677 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:06:28,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:28,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:06:28,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:28,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:28,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 19:06:28,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881072366] [2019-12-27 19:06:28,766 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:28,767 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:28,769 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:06:28,769 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:28,769 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:28,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:28,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:06:28,770 INFO L87 Difference]: Start difference. First operand 144 states and 355 transitions. Second operand 14 states. [2019-12-27 19:06:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:29,152 INFO L93 Difference]: Finished difference Result 415 states and 943 transitions. [2019-12-27 19:06:29,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:29,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:29,154 INFO L225 Difference]: With dead ends: 415 [2019-12-27 19:06:29,154 INFO L226 Difference]: Without dead ends: 413 [2019-12-27 19:06:29,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-12-27 19:06:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 144. [2019-12-27 19:06:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:06:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 355 transitions. [2019-12-27 19:06:29,159 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 355 transitions. Word has length 19 [2019-12-27 19:06:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:29,159 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 355 transitions. [2019-12-27 19:06:29,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 355 transitions. [2019-12-27 19:06:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:29,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:29,160 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:29,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:29,363 INFO L410 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -292350397, now seen corresponding path program 228 times [2019-12-27 19:06:29,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:29,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041160771] [2019-12-27 19:06:29,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:29,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041160771] [2019-12-27 19:06:29,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286532686] [2019-12-27 19:06:29,445 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:29,519 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:29,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:29,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:29,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:29,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:29,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:29,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [457394316] [2019-12-27 19:06:29,557 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:29,558 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:29,560 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:29,561 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:29,561 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:29,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:29,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:29,561 INFO L87 Difference]: Start difference. First operand 144 states and 355 transitions. Second operand 14 states. [2019-12-27 19:06:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:29,938 INFO L93 Difference]: Finished difference Result 445 states and 1007 transitions. [2019-12-27 19:06:29,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:06:29,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:29,939 INFO L225 Difference]: With dead ends: 445 [2019-12-27 19:06:29,940 INFO L226 Difference]: Without dead ends: 443 [2019-12-27 19:06:29,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:06:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2019-12-27 19:06:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 141. [2019-12-27 19:06:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:06:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 19:06:29,944 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 19:06:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:29,944 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 19:06:29,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 19:06:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:29,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:29,945 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:30,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:30,146 INFO L410 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2089309571, now seen corresponding path program 229 times [2019-12-27 19:06:30,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:30,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466616531] [2019-12-27 19:06:30,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:30,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466616531] [2019-12-27 19:06:30,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225137379] [2019-12-27 19:06:30,223 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:30,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:30,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:30,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:30,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:30,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1638701631] [2019-12-27 19:06:30,353 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:30,354 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:30,355 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:30,355 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:30,392 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:30,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:30,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:30,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:06:30,393 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 16 states. [2019-12-27 19:06:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:30,878 INFO L93 Difference]: Finished difference Result 432 states and 975 transitions. [2019-12-27 19:06:30,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:06:30,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:30,879 INFO L225 Difference]: With dead ends: 432 [2019-12-27 19:06:30,879 INFO L226 Difference]: Without dead ends: 430 [2019-12-27 19:06:30,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:06:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-27 19:06:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 142. [2019-12-27 19:06:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:06:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 19:06:30,884 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 19:06:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:30,884 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 19:06:30,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 19:06:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:30,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:30,885 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:31,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:31,085 INFO L410 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1130664982, now seen corresponding path program 230 times [2019-12-27 19:06:31,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:31,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022280569] [2019-12-27 19:06:31,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:31,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022280569] [2019-12-27 19:06:31,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462262213] [2019-12-27 19:06:31,169 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:31,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:31,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:31,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:31,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:06:31,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:31,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:31,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [574077156] [2019-12-27 19:06:31,257 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:31,257 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:31,259 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:31,259 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:31,259 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:31,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:31,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:31,260 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 19:06:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:31,606 INFO L93 Difference]: Finished difference Result 405 states and 920 transitions. [2019-12-27 19:06:31,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:31,607 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:31,608 INFO L225 Difference]: With dead ends: 405 [2019-12-27 19:06:31,608 INFO L226 Difference]: Without dead ends: 403 [2019-12-27 19:06:31,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-12-27 19:06:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 142. [2019-12-27 19:06:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:06:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 19:06:31,612 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 19:06:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:31,612 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 19:06:31,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 19:06:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:31,612 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:31,613 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:31,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:31,813 INFO L410 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1763257853, now seen corresponding path program 231 times [2019-12-27 19:06:31,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:31,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134223588] [2019-12-27 19:06:31,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:31,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134223588] [2019-12-27 19:06:31,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668190635] [2019-12-27 19:06:31,934 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:32,032 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:06:32,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:32,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:32,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:06:32,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:32,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:32,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1053775117] [2019-12-27 19:06:32,098 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:32,099 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:32,101 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:32,101 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:32,101 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:32,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:32,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:32,102 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 19:06:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:32,483 INFO L93 Difference]: Finished difference Result 431 states and 980 transitions. [2019-12-27 19:06:32,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:06:32,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:32,484 INFO L225 Difference]: With dead ends: 431 [2019-12-27 19:06:32,484 INFO L226 Difference]: Without dead ends: 429 [2019-12-27 19:06:32,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:06:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-12-27 19:06:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 141. [2019-12-27 19:06:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:06:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 19:06:32,488 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 19:06:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:32,488 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 19:06:32,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 19:06:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:32,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:32,489 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:32,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:32,690 INFO L410 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:32,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1613370313, now seen corresponding path program 232 times [2019-12-27 19:06:32,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:32,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188375120] [2019-12-27 19:06:32,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:32,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188375120] [2019-12-27 19:06:32,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793998235] [2019-12-27 19:06:32,764 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:32,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:32,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:32,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:32,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:32,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:32,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:32,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [771595227] [2019-12-27 19:06:32,859 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:32,860 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:32,861 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:32,861 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:32,862 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:32,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:32,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:32,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:32,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:32,862 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 14 states. [2019-12-27 19:06:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:33,240 INFO L93 Difference]: Finished difference Result 440 states and 994 transitions. [2019-12-27 19:06:33,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:06:33,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:33,242 INFO L225 Difference]: With dead ends: 440 [2019-12-27 19:06:33,242 INFO L226 Difference]: Without dead ends: 438 [2019-12-27 19:06:33,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:06:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-12-27 19:06:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 136. [2019-12-27 19:06:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:06:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 326 transitions. [2019-12-27 19:06:33,246 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 326 transitions. Word has length 19 [2019-12-27 19:06:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:33,246 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 326 transitions. [2019-12-27 19:06:33,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 326 transitions. [2019-12-27 19:06:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:33,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:33,246 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:33,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:33,447 INFO L410 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash -629444650, now seen corresponding path program 233 times [2019-12-27 19:06:33,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:33,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916418002] [2019-12-27 19:06:33,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:33,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916418002] [2019-12-27 19:06:33,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461750857] [2019-12-27 19:06:33,528 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:33,575 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:06:33,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:33,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:33,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:06:33,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:33,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:33,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [30513608] [2019-12-27 19:06:33,627 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:33,628 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:33,630 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:33,630 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:33,706 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:06:33,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:06:33,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:06:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:06:33,707 INFO L87 Difference]: Start difference. First operand 136 states and 326 transitions. Second operand 18 states. [2019-12-27 19:06:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:34,361 INFO L93 Difference]: Finished difference Result 460 states and 1025 transitions. [2019-12-27 19:06:34,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:06:34,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:06:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:34,362 INFO L225 Difference]: With dead ends: 460 [2019-12-27 19:06:34,363 INFO L226 Difference]: Without dead ends: 458 [2019-12-27 19:06:34,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=774, Invalid=1776, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 19:06:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-12-27 19:06:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 141. [2019-12-27 19:06:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:06:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 19:06:34,367 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 19:06:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:34,367 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 19:06:34,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:06:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 19:06:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:34,367 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:34,367 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:34,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:34,568 INFO L410 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1505004035, now seen corresponding path program 234 times [2019-12-27 19:06:34,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:34,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705059373] [2019-12-27 19:06:34,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:34,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705059373] [2019-12-27 19:06:34,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675682718] [2019-12-27 19:06:34,646 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:34,712 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:34,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:34,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:34,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:06:34,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:34,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:34,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [478909288] [2019-12-27 19:06:34,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:34,751 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:34,752 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:34,752 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:34,781 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:34,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:34,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:34,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:34,782 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 16 states. [2019-12-27 19:06:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:35,278 INFO L93 Difference]: Finished difference Result 432 states and 972 transitions. [2019-12-27 19:06:35,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:06:35,279 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:35,280 INFO L225 Difference]: With dead ends: 432 [2019-12-27 19:06:35,280 INFO L226 Difference]: Without dead ends: 430 [2019-12-27 19:06:35,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:06:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-27 19:06:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 142. [2019-12-27 19:06:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:06:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 19:06:35,284 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 19:06:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:35,284 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 19:06:35,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 19:06:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:35,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:35,285 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:35,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:35,485 INFO L410 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1831318672, now seen corresponding path program 235 times [2019-12-27 19:06:35,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:35,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651202379] [2019-12-27 19:06:35,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:35,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651202379] [2019-12-27 19:06:35,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879248045] [2019-12-27 19:06:35,565 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:35,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:35,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:06:35,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:35,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:35,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1946945266] [2019-12-27 19:06:35,652 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:35,653 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:35,655 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:06:35,655 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:35,655 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:35,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:35,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:35,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:35,656 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 19:06:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:35,983 INFO L93 Difference]: Finished difference Result 401 states and 908 transitions. [2019-12-27 19:06:35,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:35,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:35,984 INFO L225 Difference]: With dead ends: 401 [2019-12-27 19:06:35,984 INFO L226 Difference]: Without dead ends: 399 [2019-12-27 19:06:35,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-12-27 19:06:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 142. [2019-12-27 19:06:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:06:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 19:06:35,988 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 19:06:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:35,988 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 19:06:35,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 19:06:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:35,989 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:35,989 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:36,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:36,190 INFO L410 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1062604163, now seen corresponding path program 236 times [2019-12-27 19:06:36,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:36,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915529427] [2019-12-27 19:06:36,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:36,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915529427] [2019-12-27 19:06:36,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407235044] [2019-12-27 19:06:36,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:36,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:36,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:36,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:36,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:36,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:36,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:36,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426435498] [2019-12-27 19:06:36,377 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:36,378 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:36,379 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:36,379 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:36,379 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:36,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:36,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:36,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:36,380 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 19:06:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:36,783 INFO L93 Difference]: Finished difference Result 430 states and 976 transitions. [2019-12-27 19:06:36,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:06:36,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:36,784 INFO L225 Difference]: With dead ends: 430 [2019-12-27 19:06:36,785 INFO L226 Difference]: Without dead ends: 428 [2019-12-27 19:06:36,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:06:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-12-27 19:06:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 141. [2019-12-27 19:06:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:06:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 19:06:36,789 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 19:06:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:36,789 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 19:06:36,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 19:06:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:36,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:36,790 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:36,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:36,990 INFO L410 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1980943293, now seen corresponding path program 237 times [2019-12-27 19:06:36,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:36,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002406399] [2019-12-27 19:06:36,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:37,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002406399] [2019-12-27 19:06:37,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422725586] [2019-12-27 19:06:37,068 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:37,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:06:37,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:37,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:37,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:37,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:37,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:37,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662640808] [2019-12-27 19:06:37,193 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:37,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:37,195 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:37,195 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:37,195 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:37,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:37,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:37,196 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 14 states. [2019-12-27 19:06:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:37,620 INFO L93 Difference]: Finished difference Result 429 states and 971 transitions. [2019-12-27 19:06:37,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:06:37,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:37,621 INFO L225 Difference]: With dead ends: 429 [2019-12-27 19:06:37,621 INFO L226 Difference]: Without dead ends: 427 [2019-12-27 19:06:37,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-12-27 19:06:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 138. [2019-12-27 19:06:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 19:06:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 333 transitions. [2019-12-27 19:06:37,625 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 333 transitions. Word has length 19 [2019-12-27 19:06:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:37,625 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 333 transitions. [2019-12-27 19:06:37,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 333 transitions. [2019-12-27 19:06:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:37,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:37,625 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:37,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:37,826 INFO L410 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash -573959338, now seen corresponding path program 238 times [2019-12-27 19:06:37,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:37,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665654633] [2019-12-27 19:06:37,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:37,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665654633] [2019-12-27 19:06:37,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951720402] [2019-12-27 19:06:37,898 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:37,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:37,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:37,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:37,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:38,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:38,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:38,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [366677170] [2019-12-27 19:06:38,006 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:38,007 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:38,008 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:38,008 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:38,037 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:38,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:38,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:38,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:06:38,038 INFO L87 Difference]: Start difference. First operand 138 states and 333 transitions. Second operand 16 states. [2019-12-27 19:06:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:38,512 INFO L93 Difference]: Finished difference Result 459 states and 1027 transitions. [2019-12-27 19:06:38,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:06:38,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:38,513 INFO L225 Difference]: With dead ends: 459 [2019-12-27 19:06:38,513 INFO L226 Difference]: Without dead ends: 457 [2019-12-27 19:06:38,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:06:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-12-27 19:06:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 141. [2019-12-27 19:06:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:06:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 19:06:38,517 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 19:06:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:38,517 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 19:06:38,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 19:06:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:38,518 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:38,518 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:38,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:38,718 INFO L410 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash 384685251, now seen corresponding path program 239 times [2019-12-27 19:06:38,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:38,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627240629] [2019-12-27 19:06:38,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:38,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627240629] [2019-12-27 19:06:38,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866291095] [2019-12-27 19:06:38,805 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:38,853 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:06:38,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:38,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:38,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:38,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:38,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:38,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [861792824] [2019-12-27 19:06:38,909 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:38,910 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:38,912 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:06:38,912 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:38,912 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:38,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:38,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:38,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:38,913 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 14 states. [2019-12-27 19:06:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:39,317 INFO L93 Difference]: Finished difference Result 443 states and 995 transitions. [2019-12-27 19:06:39,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:06:39,318 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:39,319 INFO L225 Difference]: With dead ends: 443 [2019-12-27 19:06:39,319 INFO L226 Difference]: Without dead ends: 441 [2019-12-27 19:06:39,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-12-27 19:06:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 140. [2019-12-27 19:06:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 19:06:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 340 transitions. [2019-12-27 19:06:39,323 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 340 transitions. Word has length 19 [2019-12-27 19:06:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:39,323 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 340 transitions. [2019-12-27 19:06:39,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 340 transitions. [2019-12-27 19:06:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:39,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:39,324 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:39,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:39,525 INFO L410 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1016359210, now seen corresponding path program 240 times [2019-12-27 19:06:39,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:39,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812839797] [2019-12-27 19:06:39,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:39,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812839797] [2019-12-27 19:06:39,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036561826] [2019-12-27 19:06:39,604 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:39,673 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:39,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:39,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:39,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:39,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:39,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:39,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1587041879] [2019-12-27 19:06:39,723 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:39,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:39,725 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:39,725 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:39,726 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:39,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:39,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:39,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:39,726 INFO L87 Difference]: Start difference. First operand 140 states and 340 transitions. Second operand 14 states. [2019-12-27 19:06:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:40,122 INFO L93 Difference]: Finished difference Result 457 states and 1024 transitions. [2019-12-27 19:06:40,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:06:40,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:40,123 INFO L225 Difference]: With dead ends: 457 [2019-12-27 19:06:40,123 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 19:06:40,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 19:06:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 135. [2019-12-27 19:06:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 19:06:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 322 transitions. [2019-12-27 19:06:40,127 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 322 transitions. Word has length 19 [2019-12-27 19:06:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:40,127 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 322 transitions. [2019-12-27 19:06:40,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 322 transitions. [2019-12-27 19:06:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:40,128 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:40,128 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:40,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:40,328 INFO L410 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash -874872560, now seen corresponding path program 241 times [2019-12-27 19:06:40,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:40,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252742266] [2019-12-27 19:06:40,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:40,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252742266] [2019-12-27 19:06:40,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29073057] [2019-12-27 19:06:40,405 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:40,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:40,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:06:40,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:40,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:40,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1316680176] [2019-12-27 19:06:40,500 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:40,501 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:40,503 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:40,503 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:40,562 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:06:40,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:06:40,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:06:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:06:40,563 INFO L87 Difference]: Start difference. First operand 135 states and 322 transitions. Second operand 18 states. [2019-12-27 19:06:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:41,241 INFO L93 Difference]: Finished difference Result 457 states and 1014 transitions. [2019-12-27 19:06:41,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:06:41,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:06:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:41,243 INFO L225 Difference]: With dead ends: 457 [2019-12-27 19:06:41,243 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 19:06:41,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1845, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 19:06:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 19:06:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 143. [2019-12-27 19:06:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 349 transitions. [2019-12-27 19:06:41,247 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 349 transitions. Word has length 19 [2019-12-27 19:06:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:41,247 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 349 transitions. [2019-12-27 19:06:41,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:06:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 349 transitions. [2019-12-27 19:06:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:41,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:41,247 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:41,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:41,448 INFO L410 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1259576125, now seen corresponding path program 242 times [2019-12-27 19:06:41,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:41,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069752347] [2019-12-27 19:06:41,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:41,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069752347] [2019-12-27 19:06:41,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626301099] [2019-12-27 19:06:41,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:41,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:41,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:41,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:41,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:41,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:41,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:41,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1774965847] [2019-12-27 19:06:41,642 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:41,643 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:41,645 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:41,646 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:41,681 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:41,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:41,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:41,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:06:41,682 INFO L87 Difference]: Start difference. First operand 143 states and 349 transitions. Second operand 16 states. [2019-12-27 19:06:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:42,211 INFO L93 Difference]: Finished difference Result 425 states and 952 transitions. [2019-12-27 19:06:42,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:06:42,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:42,212 INFO L225 Difference]: With dead ends: 425 [2019-12-27 19:06:42,212 INFO L226 Difference]: Without dead ends: 423 [2019-12-27 19:06:42,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=635, Invalid=1621, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:06:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2019-12-27 19:06:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 144. [2019-12-27 19:06:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:06:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 353 transitions. [2019-12-27 19:06:42,216 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 353 transitions. Word has length 19 [2019-12-27 19:06:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:42,217 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 353 transitions. [2019-12-27 19:06:42,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 353 transitions. [2019-12-27 19:06:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:42,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:42,217 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:42,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:42,418 INFO L410 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2076746582, now seen corresponding path program 243 times [2019-12-27 19:06:42,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:42,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76789987] [2019-12-27 19:06:42,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:42,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76789987] [2019-12-27 19:06:42,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176481206] [2019-12-27 19:06:42,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:42,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:06:42,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:42,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:42,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:06:42,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:42,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:42,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1251730460] [2019-12-27 19:06:42,593 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:42,593 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:42,595 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:42,595 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:42,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:42,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:42,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:42,596 INFO L87 Difference]: Start difference. First operand 144 states and 353 transitions. Second operand 14 states. [2019-12-27 19:06:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:42,957 INFO L93 Difference]: Finished difference Result 391 states and 880 transitions. [2019-12-27 19:06:42,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:06:42,958 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:42,959 INFO L225 Difference]: With dead ends: 391 [2019-12-27 19:06:42,959 INFO L226 Difference]: Without dead ends: 389 [2019-12-27 19:06:42,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-12-27 19:06:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 144. [2019-12-27 19:06:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:06:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 353 transitions. [2019-12-27 19:06:42,963 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 353 transitions. Word has length 19 [2019-12-27 19:06:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:42,963 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 353 transitions. [2019-12-27 19:06:42,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 353 transitions. [2019-12-27 19:06:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:42,964 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:42,964 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:43,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:43,164 INFO L410 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 817176253, now seen corresponding path program 244 times [2019-12-27 19:06:43,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:43,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116347822] [2019-12-27 19:06:43,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:43,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116347822] [2019-12-27 19:06:43,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894848352] [2019-12-27 19:06:43,245 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:43,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:43,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:43,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:43,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:06:43,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:43,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:43,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1754162909] [2019-12-27 19:06:43,341 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:43,343 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:43,344 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:43,344 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:43,345 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:43,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:43,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:43,345 INFO L87 Difference]: Start difference. First operand 144 states and 353 transitions. Second operand 14 states. [2019-12-27 19:06:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:43,763 INFO L93 Difference]: Finished difference Result 422 states and 955 transitions. [2019-12-27 19:06:43,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:06:43,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:43,764 INFO L225 Difference]: With dead ends: 422 [2019-12-27 19:06:43,764 INFO L226 Difference]: Without dead ends: 420 [2019-12-27 19:06:43,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-12-27 19:06:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 143. [2019-12-27 19:06:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 349 transitions. [2019-12-27 19:06:43,768 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 349 transitions. Word has length 19 [2019-12-27 19:06:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:43,769 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 349 transitions. [2019-12-27 19:06:43,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 349 transitions. [2019-12-27 19:06:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:43,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:43,769 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:43,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:43,970 INFO L410 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1735515383, now seen corresponding path program 245 times [2019-12-27 19:06:43,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:43,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520265687] [2019-12-27 19:06:43,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:44,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520265687] [2019-12-27 19:06:44,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029253813] [2019-12-27 19:06:44,053 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:44,102 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:06:44,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:44,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:44,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:44,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:44,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:44,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1478751916] [2019-12-27 19:06:44,168 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:44,169 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:44,172 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:44,172 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:44,172 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:44,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:44,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:44,173 INFO L87 Difference]: Start difference. First operand 143 states and 349 transitions. Second operand 14 states. [2019-12-27 19:06:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:44,610 INFO L93 Difference]: Finished difference Result 421 states and 950 transitions. [2019-12-27 19:06:44,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:06:44,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:44,612 INFO L225 Difference]: With dead ends: 421 [2019-12-27 19:06:44,612 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 19:06:44,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:06:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 19:06:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 140. [2019-12-27 19:06:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 19:06:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 338 transitions. [2019-12-27 19:06:44,616 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 338 transitions. Word has length 19 [2019-12-27 19:06:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:44,616 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 338 transitions. [2019-12-27 19:06:44,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 338 transitions. [2019-12-27 19:06:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:44,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:44,617 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:44,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:44,818 INFO L410 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash -819387248, now seen corresponding path program 246 times [2019-12-27 19:06:44,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:44,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659387212] [2019-12-27 19:06:44,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:44,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659387212] [2019-12-27 19:06:44,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179366066] [2019-12-27 19:06:44,893 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:44,957 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:44,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:44,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:44,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:45,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:45,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:45,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1785864434] [2019-12-27 19:06:45,045 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:45,046 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:45,048 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:45,048 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:45,099 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:45,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:45,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:45,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:06:45,100 INFO L87 Difference]: Start difference. First operand 140 states and 338 transitions. Second operand 16 states. [2019-12-27 19:06:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:45,602 INFO L93 Difference]: Finished difference Result 433 states and 965 transitions. [2019-12-27 19:06:45,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:06:45,603 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:45,604 INFO L225 Difference]: With dead ends: 433 [2019-12-27 19:06:45,604 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 19:06:45,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1452, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:06:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 19:06:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 143. [2019-12-27 19:06:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 349 transitions. [2019-12-27 19:06:45,608 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 349 transitions. Word has length 19 [2019-12-27 19:06:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:45,608 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 349 transitions. [2019-12-27 19:06:45,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 349 transitions. [2019-12-27 19:06:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:45,608 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:45,608 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:45,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:45,809 INFO L410 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash 139257341, now seen corresponding path program 247 times [2019-12-27 19:06:45,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:45,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318882328] [2019-12-27 19:06:45,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:45,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318882328] [2019-12-27 19:06:45,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573791981] [2019-12-27 19:06:45,889 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:45,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:45,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:06:46,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:46,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:46,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1907189174] [2019-12-27 19:06:46,012 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:46,013 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:46,015 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:06:46,015 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:46,015 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:46,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:46,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:46,015 INFO L87 Difference]: Start difference. First operand 143 states and 349 transitions. Second operand 14 states. [2019-12-27 19:06:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:46,442 INFO L93 Difference]: Finished difference Result 423 states and 951 transitions. [2019-12-27 19:06:46,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:06:46,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:46,444 INFO L225 Difference]: With dead ends: 423 [2019-12-27 19:06:46,444 INFO L226 Difference]: Without dead ends: 421 [2019-12-27 19:06:46,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-12-27 19:06:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 142. [2019-12-27 19:06:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:06:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 345 transitions. [2019-12-27 19:06:46,448 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 345 transitions. Word has length 19 [2019-12-27 19:06:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:46,448 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 345 transitions. [2019-12-27 19:06:46,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 345 transitions. [2019-12-27 19:06:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:46,448 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:46,448 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:46,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:46,649 INFO L410 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1261787120, now seen corresponding path program 248 times [2019-12-27 19:06:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:46,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772519673] [2019-12-27 19:06:46,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:46,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772519673] [2019-12-27 19:06:46,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158598608] [2019-12-27 19:06:46,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:46,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:46,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:46,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:46,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:46,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:46,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:46,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1407445634] [2019-12-27 19:06:46,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:46,839 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:46,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:46,840 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:46,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:46,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:46,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:46,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:46,841 INFO L87 Difference]: Start difference. First operand 142 states and 345 transitions. Second operand 14 states. [2019-12-27 19:06:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:47,269 INFO L93 Difference]: Finished difference Result 439 states and 986 transitions. [2019-12-27 19:06:47,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:06:47,269 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:47,269 INFO L225 Difference]: With dead ends: 439 [2019-12-27 19:06:47,269 INFO L226 Difference]: Without dead ends: 437 [2019-12-27 19:06:47,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1243, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-12-27 19:06:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 139. [2019-12-27 19:06:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 19:06:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 334 transitions. [2019-12-27 19:06:47,273 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 334 transitions. Word has length 19 [2019-12-27 19:06:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:47,273 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 334 transitions. [2019-12-27 19:06:47,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 334 transitions. [2019-12-27 19:06:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:47,274 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:47,274 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:47,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:47,476 INFO L410 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1236221002, now seen corresponding path program 249 times [2019-12-27 19:06:47,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:47,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043630089] [2019-12-27 19:06:47,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:47,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043630089] [2019-12-27 19:06:47,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063137372] [2019-12-27 19:06:47,549 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:47,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:06:47,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:47,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:47,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:47,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:47,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:47,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393270261] [2019-12-27 19:06:47,666 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:47,667 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:47,668 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:47,669 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:47,697 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:06:47,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:47,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:47,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:47,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:06:47,698 INFO L87 Difference]: Start difference. First operand 139 states and 334 transitions. Second operand 16 states. [2019-12-27 19:06:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:48,235 INFO L93 Difference]: Finished difference Result 456 states and 1012 transitions. [2019-12-27 19:06:48,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:06:48,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:48,237 INFO L225 Difference]: With dead ends: 456 [2019-12-27 19:06:48,237 INFO L226 Difference]: Without dead ends: 454 [2019-12-27 19:06:48,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=637, Invalid=1619, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:06:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-12-27 19:06:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 145. [2019-12-27 19:06:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:06:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:06:48,241 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:06:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:48,241 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:06:48,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:06:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:48,242 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:48,242 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:48,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:48,443 INFO L410 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2100101705, now seen corresponding path program 250 times [2019-12-27 19:06:48,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:48,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674430862] [2019-12-27 19:06:48,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:48,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674430862] [2019-12-27 19:06:48,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663030048] [2019-12-27 19:06:48,521 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:48,584 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:48,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:48,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:48,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:06:48,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:48,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:48,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18100467] [2019-12-27 19:06:48,622 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:48,623 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:48,625 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:06:48,625 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:48,625 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:48,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:48,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:48,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:48,626 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 19:06:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:49,048 INFO L93 Difference]: Finished difference Result 433 states and 963 transitions. [2019-12-27 19:06:49,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:06:49,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:49,049 INFO L225 Difference]: With dead ends: 433 [2019-12-27 19:06:49,050 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 19:06:49,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 19:06:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 144. [2019-12-27 19:06:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:06:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 350 transitions. [2019-12-27 19:06:49,054 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 350 transitions. Word has length 19 [2019-12-27 19:06:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:49,054 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 350 transitions. [2019-12-27 19:06:49,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 350 transitions. [2019-12-27 19:06:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:49,055 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:49,055 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:49,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:49,258 INFO L410 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 793821130, now seen corresponding path program 251 times [2019-12-27 19:06:49,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:49,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236835528] [2019-12-27 19:06:49,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:49,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236835528] [2019-12-27 19:06:49,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942341867] [2019-12-27 19:06:49,335 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:49,383 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:06:49,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:49,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:49,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:06:49,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:49,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:49,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393867384] [2019-12-27 19:06:49,428 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:49,428 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:49,430 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:06:49,430 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:49,430 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:49,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:49,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:49,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:49,431 INFO L87 Difference]: Start difference. First operand 144 states and 350 transitions. Second operand 14 states. [2019-12-27 19:06:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:49,871 INFO L93 Difference]: Finished difference Result 454 states and 1012 transitions. [2019-12-27 19:06:49,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:49,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:49,872 INFO L225 Difference]: With dead ends: 454 [2019-12-27 19:06:49,872 INFO L226 Difference]: Without dead ends: 452 [2019-12-27 19:06:49,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1228, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:06:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-12-27 19:06:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 143. [2019-12-27 19:06:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2019-12-27 19:06:49,876 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 19 [2019-12-27 19:06:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:49,876 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2019-12-27 19:06:49,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2019-12-27 19:06:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:49,876 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:49,877 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:50,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:50,077 INFO L410 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1712160260, now seen corresponding path program 252 times [2019-12-27 19:06:50,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:50,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313321685] [2019-12-27 19:06:50,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:50,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313321685] [2019-12-27 19:06:50,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473651438] [2019-12-27 19:06:50,156 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:50,225 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:06:50,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:50,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:06:50,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:06:50,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:50,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:06:50,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [317059142] [2019-12-27 19:06:50,282 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:50,283 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:50,284 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:06:50,284 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:50,284 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:06:50,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:50,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:50,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:50,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:50,285 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand 14 states. [2019-12-27 19:06:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:50,731 INFO L93 Difference]: Finished difference Result 459 states and 1016 transitions. [2019-12-27 19:06:50,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:06:50,732 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:50,733 INFO L225 Difference]: With dead ends: 459 [2019-12-27 19:06:50,733 INFO L226 Difference]: Without dead ends: 457 [2019-12-27 19:06:50,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:06:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-12-27 19:06:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 137. [2019-12-27 19:06:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 19:06:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 327 transitions. [2019-12-27 19:06:50,737 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 327 transitions. Word has length 19 [2019-12-27 19:06:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:50,737 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 327 transitions. [2019-12-27 19:06:50,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 327 transitions. [2019-12-27 19:06:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:50,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:50,738 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:50,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:50,939 INFO L410 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -360855012, now seen corresponding path program 253 times [2019-12-27 19:06:50,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:50,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953365728] [2019-12-27 19:06:50,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:51,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953365728] [2019-12-27 19:06:51,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174909095] [2019-12-27 19:06:51,015 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:51,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:06:51,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:06:51,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:51,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:06:51,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323720060] [2019-12-27 19:06:51,116 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:51,117 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:51,119 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:51,119 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:51,251 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 19:06:51,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 19:06:51,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 19:06:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:06:51,252 INFO L87 Difference]: Start difference. First operand 137 states and 327 transitions. Second operand 22 states. [2019-12-27 19:06:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:52,354 INFO L93 Difference]: Finished difference Result 520 states and 1141 transitions. [2019-12-27 19:06:52,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-12-27 19:06:52,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2019-12-27 19:06:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:52,355 INFO L225 Difference]: With dead ends: 520 [2019-12-27 19:06:52,355 INFO L226 Difference]: Without dead ends: 518 [2019-12-27 19:06:52,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1260, Invalid=3162, Unknown=0, NotChecked=0, Total=4422 [2019-12-27 19:06:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2019-12-27 19:06:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 143. [2019-12-27 19:06:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-27 19:06:52,359 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 19 [2019-12-27 19:06:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:52,360 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-27 19:06:52,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 19:06:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-27 19:06:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:52,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:52,360 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:52,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:52,564 INFO L410 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1777072695, now seen corresponding path program 254 times [2019-12-27 19:06:52,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:52,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971732354] [2019-12-27 19:06:52,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:52,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971732354] [2019-12-27 19:06:52,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248885796] [2019-12-27 19:06:52,641 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:52,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:52,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:52,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:06:52,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:06:52,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:52,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:06:52,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1896092680] [2019-12-27 19:06:52,761 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:52,762 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:52,765 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:52,765 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:52,879 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 19:06:52,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:06:52,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:06:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:06:52,881 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 20 states. [2019-12-27 19:06:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:53,635 INFO L93 Difference]: Finished difference Result 475 states and 1060 transitions. [2019-12-27 19:06:53,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:06:53,636 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 19:06:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:53,637 INFO L225 Difference]: With dead ends: 475 [2019-12-27 19:06:53,638 INFO L226 Difference]: Without dead ends: 473 [2019-12-27 19:06:53,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 19:06:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2019-12-27 19:06:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 143. [2019-12-27 19:06:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-27 19:06:53,642 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 19 [2019-12-27 19:06:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:53,642 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-27 19:06:53,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:06:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-27 19:06:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:53,643 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:53,643 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:53,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:53,846 INFO L410 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:53,847 INFO L82 PathProgramCache]: Analyzing trace with hash 728713398, now seen corresponding path program 255 times [2019-12-27 19:06:53,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:53,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839190227] [2019-12-27 19:06:53,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:53,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839190227] [2019-12-27 19:06:53,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195155719] [2019-12-27 19:06:53,930 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:53,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:06:53,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:53,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:53,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 19:06:54,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:54,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:54,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1133220002] [2019-12-27 19:06:54,022 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:54,023 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:54,026 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:54,026 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:54,104 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 19:06:54,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:06:54,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:54,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:06:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:06:54,105 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 18 states. [2019-12-27 19:06:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:54,557 INFO L93 Difference]: Finished difference Result 407 states and 917 transitions. [2019-12-27 19:06:54,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:06:54,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:06:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:54,559 INFO L225 Difference]: With dead ends: 407 [2019-12-27 19:06:54,559 INFO L226 Difference]: Without dead ends: 405 [2019-12-27 19:06:54,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:06:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2019-12-27 19:06:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 143. [2019-12-27 19:06:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:06:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-27 19:06:54,563 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 19 [2019-12-27 19:06:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:54,563 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-27 19:06:54,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:06:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-27 19:06:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:54,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:54,564 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:54,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:54,764 INFO L410 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1431805213, now seen corresponding path program 256 times [2019-12-27 19:06:54,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:54,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748327193] [2019-12-27 19:06:54,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:54,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748327193] [2019-12-27 19:06:54,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266784401] [2019-12-27 19:06:54,917 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:54,997 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:54,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:55,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:06:55,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-27 19:06:55,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:55,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:06:55,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1549773449] [2019-12-27 19:06:55,047 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:55,048 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:55,051 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 19:06:55,051 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:55,076 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 19:06:55,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:55,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:06:55,077 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-27 19:06:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:55,347 INFO L93 Difference]: Finished difference Result 334 states and 763 transitions. [2019-12-27 19:06:55,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:06:55,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:55,349 INFO L225 Difference]: With dead ends: 334 [2019-12-27 19:06:55,349 INFO L226 Difference]: Without dead ends: 332 [2019-12-27 19:06:55,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:06:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-27 19:06:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 145. [2019-12-27 19:06:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:06:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:06:55,352 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:06:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:55,353 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:06:55,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:06:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:55,353 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:55,353 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:55,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:55,556 INFO L410 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1874205085, now seen corresponding path program 257 times [2019-12-27 19:06:55,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:55,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261971686] [2019-12-27 19:06:55,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:55,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261971686] [2019-12-27 19:06:55,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248844190] [2019-12-27 19:06:55,641 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:55,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 19:06:55,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:55,703 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:06:55,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-12-27 19:06:55,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:55,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:06:55,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1590852339] [2019-12-27 19:06:55,719 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:55,720 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:55,722 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:06:55,722 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:55,723 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:06:55,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:55,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:06:55,723 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 19:06:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:55,933 INFO L93 Difference]: Finished difference Result 345 states and 795 transitions. [2019-12-27 19:06:55,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:06:55,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:55,934 INFO L225 Difference]: With dead ends: 345 [2019-12-27 19:06:55,935 INFO L226 Difference]: Without dead ends: 343 [2019-12-27 19:06:55,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:06:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-12-27 19:06:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 145. [2019-12-27 19:06:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:06:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:06:55,939 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:06:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:55,939 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:06:55,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:06:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:55,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:55,939 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:56,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:56,141 INFO L410 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:56,142 INFO L82 PathProgramCache]: Analyzing trace with hash -955865955, now seen corresponding path program 258 times [2019-12-27 19:06:56,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:56,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430405409] [2019-12-27 19:06:56,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:56,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430405409] [2019-12-27 19:06:56,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176982722] [2019-12-27 19:06:56,228 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:56,299 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 19:06:56,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:56,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:06:56,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:56,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2019-12-27 19:06:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55166159] [2019-12-27 19:06:56,417 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:56,418 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:56,421 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:06:56,421 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:56,422 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:06:56,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:56,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:06:56,422 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 19:06:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:56,645 INFO L93 Difference]: Finished difference Result 364 states and 843 transitions. [2019-12-27 19:06:56,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:06:56,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:56,647 INFO L225 Difference]: With dead ends: 364 [2019-12-27 19:06:56,647 INFO L226 Difference]: Without dead ends: 362 [2019-12-27 19:06:56,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:06:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-12-27 19:06:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 145. [2019-12-27 19:06:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:06:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:06:56,650 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:06:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:56,650 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:06:56,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:06:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:56,650 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:56,651 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:56,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:56,851 INFO L410 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 784198710, now seen corresponding path program 259 times [2019-12-27 19:06:56,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:56,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11844147] [2019-12-27 19:06:56,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:56,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11844147] [2019-12-27 19:06:56,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454569267] [2019-12-27 19:06:56,931 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:56,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:06:56,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:06:57,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:57,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 19:06:57,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1607759278] [2019-12-27 19:06:57,076 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:57,076 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:57,078 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:06:57,078 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:57,112 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:06:57,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:57,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:57,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:06:57,113 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 16 states. [2019-12-27 19:06:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:57,462 INFO L93 Difference]: Finished difference Result 419 states and 958 transitions. [2019-12-27 19:06:57,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:06:57,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:57,464 INFO L225 Difference]: With dead ends: 419 [2019-12-27 19:06:57,464 INFO L226 Difference]: Without dead ends: 417 [2019-12-27 19:06:57,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:06:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-12-27 19:06:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 147. [2019-12-27 19:06:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:06:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 19:06:57,469 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 19:06:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:57,469 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 19:06:57,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 19:06:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:57,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:57,469 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:57,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:57,670 INFO L410 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:57,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1742843299, now seen corresponding path program 260 times [2019-12-27 19:06:57,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:57,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939780677] [2019-12-27 19:06:57,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:57,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939780677] [2019-12-27 19:06:57,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470908250] [2019-12-27 19:06:57,752 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:57,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:06:57,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:57,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:06:57,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:06:57,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:57,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:06:57,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [729230574] [2019-12-27 19:06:57,853 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:57,854 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:57,857 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:06:57,857 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:57,858 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:06:57,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:57,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:06:57,859 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 14 states. [2019-12-27 19:06:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:58,060 INFO L93 Difference]: Finished difference Result 379 states and 875 transitions. [2019-12-27 19:06:58,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:06:58,060 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:58,061 INFO L225 Difference]: With dead ends: 379 [2019-12-27 19:06:58,061 INFO L226 Difference]: Without dead ends: 377 [2019-12-27 19:06:58,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:06:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-12-27 19:06:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 147. [2019-12-27 19:06:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:06:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 19:06:58,064 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 19:06:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:58,065 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 19:06:58,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 19:06:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:58,065 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:58,065 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:58,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:58,266 INFO L410 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 341798838, now seen corresponding path program 261 times [2019-12-27 19:06:58,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:58,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448905386] [2019-12-27 19:06:58,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:58,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448905386] [2019-12-27 19:06:58,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134603729] [2019-12-27 19:06:58,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:58,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:06:58,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:58,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:58,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:06:58,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:58,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:58,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1147646759] [2019-12-27 19:06:58,446 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:58,447 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:58,449 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:06:58,449 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:58,450 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:06:58,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:58,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:06:58,450 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 14 states. [2019-12-27 19:06:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:58,680 INFO L93 Difference]: Finished difference Result 413 states and 943 transitions. [2019-12-27 19:06:58,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:06:58,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:58,681 INFO L225 Difference]: With dead ends: 413 [2019-12-27 19:06:58,682 INFO L226 Difference]: Without dead ends: 411 [2019-12-27 19:06:58,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:06:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2019-12-27 19:06:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 145. [2019-12-27 19:06:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:06:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:06:58,686 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:06:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:58,686 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:06:58,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:06:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:58,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:58,686 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:58,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:58,887 INFO L410 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1455160336, now seen corresponding path program 262 times [2019-12-27 19:06:58,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:58,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188060078] [2019-12-27 19:06:58,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:58,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188060078] [2019-12-27 19:06:58,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199751243] [2019-12-27 19:06:58,967 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:59,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:06:59,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:59,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:06:59,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:06:59,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:59,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:06:59,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1897167144] [2019-12-27 19:06:59,058 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:59,059 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:59,061 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:06:59,061 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:59,087 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:06:59,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:06:59,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:06:59,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:06:59,088 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 16 states. [2019-12-27 19:06:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:59,419 INFO L93 Difference]: Finished difference Result 424 states and 974 transitions. [2019-12-27 19:06:59,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:06:59,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:06:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:59,421 INFO L225 Difference]: With dead ends: 424 [2019-12-27 19:06:59,421 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 19:06:59,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:06:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 19:06:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 148. [2019-12-27 19:06:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:06:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 19:06:59,425 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 19:06:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:59,425 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 19:06:59,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:06:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 19:06:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:59,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:59,426 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:06:59,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:59,628 INFO L410 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:06:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:06:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -496515747, now seen corresponding path program 263 times [2019-12-27 19:06:59,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:06:59,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788621212] [2019-12-27 19:06:59,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:06:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:06:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:06:59,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788621212] [2019-12-27 19:06:59,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068959537] [2019-12-27 19:06:59,711 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:06:59,774 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 19:06:59,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:06:59,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:06:59,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:06:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-27 19:06:59,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:06:59,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:06:59,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2037253714] [2019-12-27 19:06:59,791 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:06:59,792 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:06:59,794 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:06:59,794 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:06:59,795 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:06:59,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:06:59,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:06:59,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:06:59,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:06:59,795 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 19:06:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:06:59,987 INFO L93 Difference]: Finished difference Result 382 states and 889 transitions. [2019-12-27 19:06:59,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:06:59,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:06:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:06:59,988 INFO L225 Difference]: With dead ends: 382 [2019-12-27 19:06:59,988 INFO L226 Difference]: Without dead ends: 380 [2019-12-27 19:06:59,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:06:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-12-27 19:06:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 148. [2019-12-27 19:06:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:06:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 19:06:59,992 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 19:06:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:06:59,992 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 19:06:59,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:06:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 19:06:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:06:59,992 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:06:59,992 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:00,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:00,193 INFO L410 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:00,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1897560208, now seen corresponding path program 264 times [2019-12-27 19:07:00,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:00,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724749612] [2019-12-27 19:07:00,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:00,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724749612] [2019-12-27 19:07:00,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321166285] [2019-12-27 19:07:00,268 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:00,339 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:00,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:00,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:07:00,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:00,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:00,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 19:07:00,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1696296790] [2019-12-27 19:07:00,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:00,419 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:00,421 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:00,421 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:00,422 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:00,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:00,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:00,422 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 19:07:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:00,690 INFO L93 Difference]: Finished difference Result 430 states and 999 transitions. [2019-12-27 19:07:00,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:07:00,691 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:00,691 INFO L225 Difference]: With dead ends: 430 [2019-12-27 19:07:00,692 INFO L226 Difference]: Without dead ends: 428 [2019-12-27 19:07:00,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:07:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-12-27 19:07:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 147. [2019-12-27 19:07:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 19:07:00,695 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 19:07:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:00,695 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 19:07:00,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 19:07:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:00,696 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:00,696 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:00,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:00,896 INFO L410 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:00,897 INFO L82 PathProgramCache]: Analyzing trace with hash -979221078, now seen corresponding path program 265 times [2019-12-27 19:07:00,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:00,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081924770] [2019-12-27 19:07:00,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:00,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081924770] [2019-12-27 19:07:00,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438468059] [2019-12-27 19:07:00,972 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:01,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:01,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:07:01,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:01,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:01,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [166099023] [2019-12-27 19:07:01,057 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:01,057 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:01,059 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:01,059 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:01,060 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:01,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:01,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:01,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:01,061 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 14 states. [2019-12-27 19:07:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:01,299 INFO L93 Difference]: Finished difference Result 433 states and 1002 transitions. [2019-12-27 19:07:01,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:07:01,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:01,301 INFO L225 Difference]: With dead ends: 433 [2019-12-27 19:07:01,301 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 19:07:01,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:07:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 19:07:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 145. [2019-12-27 19:07:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:07:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:07:01,305 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:07:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:01,305 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:07:01,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:01,305 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:07:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:01,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:01,306 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:01,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:01,506 INFO L410 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:01,507 INFO L82 PathProgramCache]: Analyzing trace with hash 4704585, now seen corresponding path program 266 times [2019-12-27 19:07:01,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:01,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830946658] [2019-12-27 19:07:01,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:01,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830946658] [2019-12-27 19:07:01,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630901612] [2019-12-27 19:07:01,582 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:01,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:01,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:01,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:01,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:01,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:01,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:01,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1703833810] [2019-12-27 19:07:01,701 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:01,701 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:01,712 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:07:01,713 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:01,778 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:07:01,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:01,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:07:01,779 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 18 states. [2019-12-27 19:07:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:02,310 INFO L93 Difference]: Finished difference Result 477 states and 1080 transitions. [2019-12-27 19:07:02,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:07:02,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:02,311 INFO L225 Difference]: With dead ends: 477 [2019-12-27 19:07:02,311 INFO L226 Difference]: Without dead ends: 475 [2019-12-27 19:07:02,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=614, Invalid=1548, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 19:07:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-12-27 19:07:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 147. [2019-12-27 19:07:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 19:07:02,316 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 19:07:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:02,316 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 19:07:02,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 19:07:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:02,316 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:02,316 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:02,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:02,517 INFO L410 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2139153270, now seen corresponding path program 267 times [2019-12-27 19:07:02,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:02,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109713032] [2019-12-27 19:07:02,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:02,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109713032] [2019-12-27 19:07:02,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594367084] [2019-12-27 19:07:02,596 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:02,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:07:02,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:02,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:07:02,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:07:02,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:02,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 19:07:02,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [959420189] [2019-12-27 19:07:02,738 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:02,738 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:02,740 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:02,740 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:02,780 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:07:02,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:02,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:07:02,781 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 16 states. [2019-12-27 19:07:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:03,168 INFO L93 Difference]: Finished difference Result 421 states and 964 transitions. [2019-12-27 19:07:03,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:07:03,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:03,170 INFO L225 Difference]: With dead ends: 421 [2019-12-27 19:07:03,170 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 19:07:03,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:07:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 19:07:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 149. [2019-12-27 19:07:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 19:07:03,174 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 19:07:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:03,174 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 19:07:03,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 19:07:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:03,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:03,174 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:03,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:03,375 INFO L410 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1197169437, now seen corresponding path program 268 times [2019-12-27 19:07:03,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:03,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796299526] [2019-12-27 19:07:03,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:03,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796299526] [2019-12-27 19:07:03,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112985690] [2019-12-27 19:07:03,454 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:03,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:03,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:03,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:07:03,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:07:03,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:03,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:07:03,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1665250686] [2019-12-27 19:07:03,538 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:03,539 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:03,540 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:07:03,541 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:03,541 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:03,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:03,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:03,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:03,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:07:03,542 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 19:07:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:03,730 INFO L93 Difference]: Finished difference Result 381 states and 883 transitions. [2019-12-27 19:07:03,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:07:03,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:03,732 INFO L225 Difference]: With dead ends: 381 [2019-12-27 19:07:03,732 INFO L226 Difference]: Without dead ends: 379 [2019-12-27 19:07:03,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:07:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-12-27 19:07:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 149. [2019-12-27 19:07:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 19:07:03,736 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 19:07:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:03,736 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 19:07:03,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 19:07:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:03,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:03,737 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:03,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:03,938 INFO L410 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1696753398, now seen corresponding path program 269 times [2019-12-27 19:07:03,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:03,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297857420] [2019-12-27 19:07:03,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:04,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297857420] [2019-12-27 19:07:04,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831491239] [2019-12-27 19:07:04,016 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:04,078 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:07:04,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:04,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:04,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 19:07:04,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:04,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:04,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [665781491] [2019-12-27 19:07:04,104 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:04,105 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:04,108 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:04,108 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:04,108 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:04,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:04,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:04,109 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 19:07:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:04,381 INFO L93 Difference]: Finished difference Result 429 states and 991 transitions. [2019-12-27 19:07:04,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:07:04,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:04,383 INFO L225 Difference]: With dead ends: 429 [2019-12-27 19:07:04,383 INFO L226 Difference]: Without dead ends: 427 [2019-12-27 19:07:04,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:07:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-12-27 19:07:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 148. [2019-12-27 19:07:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 19:07:04,387 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 19:07:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:04,387 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 19:07:04,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 19:07:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:04,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:04,388 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:04,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:04,588 INFO L410 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1679874768, now seen corresponding path program 270 times [2019-12-27 19:07:04,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:04,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321651808] [2019-12-27 19:07:04,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:04,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321651808] [2019-12-27 19:07:04,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561232401] [2019-12-27 19:07:04,665 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:04,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:07:04,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:04,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:04,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:07:04,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:04,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:04,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342481373] [2019-12-27 19:07:04,757 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:04,758 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:04,760 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:04,760 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:04,761 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:04,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:04,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:04,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:04,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:04,762 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 19:07:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:05,017 INFO L93 Difference]: Finished difference Result 440 states and 1017 transitions. [2019-12-27 19:07:05,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:07:05,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:05,019 INFO L225 Difference]: With dead ends: 440 [2019-12-27 19:07:05,019 INFO L226 Difference]: Without dead ends: 438 [2019-12-27 19:07:05,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:07:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-12-27 19:07:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 147. [2019-12-27 19:07:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 19:07:05,023 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 19:07:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:05,024 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 19:07:05,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:05,024 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 19:07:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:05,024 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:05,024 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:05,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:05,225 INFO L410 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 60189897, now seen corresponding path program 271 times [2019-12-27 19:07:05,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:05,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634917749] [2019-12-27 19:07:05,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:05,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634917749] [2019-12-27 19:07:05,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614175495] [2019-12-27 19:07:05,300 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:05,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:05,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:05,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:05,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:05,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [651428257] [2019-12-27 19:07:05,421 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:05,422 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:05,424 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:05,424 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:05,458 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:07:05,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:05,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:05,459 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 16 states. [2019-12-27 19:07:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:05,844 INFO L93 Difference]: Finished difference Result 465 states and 1058 transitions. [2019-12-27 19:07:05,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:05,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:05,845 INFO L225 Difference]: With dead ends: 465 [2019-12-27 19:07:05,846 INFO L226 Difference]: Without dead ends: 463 [2019-12-27 19:07:05,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:07:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-12-27 19:07:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 149. [2019-12-27 19:07:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 368 transitions. [2019-12-27 19:07:05,850 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 368 transitions. Word has length 19 [2019-12-27 19:07:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:05,850 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 368 transitions. [2019-12-27 19:07:05,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 368 transitions. [2019-12-27 19:07:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:05,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:05,851 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:06,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:06,052 INFO L410 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1018834486, now seen corresponding path program 272 times [2019-12-27 19:07:06,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:06,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758643622] [2019-12-27 19:07:06,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:06,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758643622] [2019-12-27 19:07:06,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829887133] [2019-12-27 19:07:06,130 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:06,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:06,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:06,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:06,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 19:07:06,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:06,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:06,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1983268975] [2019-12-27 19:07:06,219 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:06,219 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:06,221 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:06,221 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:06,222 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:06,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:06,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:06,222 INFO L87 Difference]: Start difference. First operand 149 states and 368 transitions. Second operand 14 states. [2019-12-27 19:07:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:06,472 INFO L93 Difference]: Finished difference Result 437 states and 999 transitions. [2019-12-27 19:07:06,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:07:06,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:06,473 INFO L225 Difference]: With dead ends: 437 [2019-12-27 19:07:06,473 INFO L226 Difference]: Without dead ends: 435 [2019-12-27 19:07:06,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:07:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-12-27 19:07:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 149. [2019-12-27 19:07:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 368 transitions. [2019-12-27 19:07:06,477 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 368 transitions. Word has length 19 [2019-12-27 19:07:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:06,477 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 368 transitions. [2019-12-27 19:07:06,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 368 transitions. [2019-12-27 19:07:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:06,477 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:06,477 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:06,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:06,678 INFO L410 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -382209975, now seen corresponding path program 273 times [2019-12-27 19:07:06,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:06,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716981004] [2019-12-27 19:07:06,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:06,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716981004] [2019-12-27 19:07:06,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634732955] [2019-12-27 19:07:06,755 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:06,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:06,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:06,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:06,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:06,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:06,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:06,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [52820184] [2019-12-27 19:07:06,885 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:06,886 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:06,888 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:06,888 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:06,889 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:06,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:06,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:06,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:06,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:06,890 INFO L87 Difference]: Start difference. First operand 149 states and 368 transitions. Second operand 14 states. [2019-12-27 19:07:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:07,178 INFO L93 Difference]: Finished difference Result 459 states and 1037 transitions. [2019-12-27 19:07:07,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:07:07,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:07,179 INFO L225 Difference]: With dead ends: 459 [2019-12-27 19:07:07,179 INFO L226 Difference]: Without dead ends: 457 [2019-12-27 19:07:07,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=930, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:07:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-12-27 19:07:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 145. [2019-12-27 19:07:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:07:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:07:07,184 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:07:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:07,184 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:07:07,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:07:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:07,184 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:07,184 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:07,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:07,385 INFO L410 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash -240723325, now seen corresponding path program 274 times [2019-12-27 19:07:07,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:07,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516968557] [2019-12-27 19:07:07,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:07,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516968557] [2019-12-27 19:07:07,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703432186] [2019-12-27 19:07:07,460 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:07,520 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:07,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:07,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:07,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:07,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:07,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:07,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1606525466] [2019-12-27 19:07:07,554 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:07,555 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:07,557 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:07,557 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:07,615 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:07:07,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:07,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:07,616 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 18 states. [2019-12-27 19:07:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:08,149 INFO L93 Difference]: Finished difference Result 462 states and 1052 transitions. [2019-12-27 19:07:08,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:07:08,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:08,150 INFO L225 Difference]: With dead ends: 462 [2019-12-27 19:07:08,150 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 19:07:08,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=590, Invalid=1480, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:07:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 19:07:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 146. [2019-12-27 19:07:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:08,154 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:08,155 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:08,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:08,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:08,155 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:08,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:08,356 INFO L410 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:08,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1893725360, now seen corresponding path program 275 times [2019-12-27 19:07:08,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:08,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432448055] [2019-12-27 19:07:08,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:08,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432448055] [2019-12-27 19:07:08,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709978031] [2019-12-27 19:07:08,435 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:08,499 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:07:08,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:08,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:07:08,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:08,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:08,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:07:08,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [675017359] [2019-12-27 19:07:08,506 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:08,507 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:08,509 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:08,509 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:08,530 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:08,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:08,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:08,531 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 19:07:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:08,863 INFO L93 Difference]: Finished difference Result 409 states and 944 transitions. [2019-12-27 19:07:08,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:08,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:08,865 INFO L225 Difference]: With dead ends: 409 [2019-12-27 19:07:08,865 INFO L226 Difference]: Without dead ends: 407 [2019-12-27 19:07:08,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=828, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:07:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2019-12-27 19:07:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 148. [2019-12-27 19:07:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:08,868 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:08,869 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:08,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:08,869 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:08,870 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:09,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:09,073 INFO L410 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:09,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1442597347, now seen corresponding path program 276 times [2019-12-27 19:07:09,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:09,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678649387] [2019-12-27 19:07:09,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:09,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678649387] [2019-12-27 19:07:09,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405016080] [2019-12-27 19:07:09,154 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:09,227 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 19:07:09,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:09,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:07:09,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-12-27 19:07:09,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:09,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:07:09,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1456707482] [2019-12-27 19:07:09,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:09,246 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:09,248 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:07:09,248 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:09,249 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:09,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:09,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:07:09,249 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:09,449 INFO L93 Difference]: Finished difference Result 365 states and 854 transitions. [2019-12-27 19:07:09,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:07:09,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:09,450 INFO L225 Difference]: With dead ends: 365 [2019-12-27 19:07:09,451 INFO L226 Difference]: Without dead ends: 363 [2019-12-27 19:07:09,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:07:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-12-27 19:07:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 148. [2019-12-27 19:07:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:09,455 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:09,455 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:09,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:09,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:09,455 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:09,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:09,656 INFO L410 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1451325488, now seen corresponding path program 277 times [2019-12-27 19:07:09,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:09,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556825959] [2019-12-27 19:07:09,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:09,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556825959] [2019-12-27 19:07:09,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776234741] [2019-12-27 19:07:09,737 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:09,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:09,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:07:09,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:09,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:09,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562626841] [2019-12-27 19:07:09,826 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:09,827 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:09,828 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:09,829 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:09,829 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:09,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:09,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:09,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:09,830 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:10,117 INFO L93 Difference]: Finished difference Result 408 states and 953 transitions. [2019-12-27 19:07:10,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:07:10,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:10,119 INFO L225 Difference]: With dead ends: 408 [2019-12-27 19:07:10,119 INFO L226 Difference]: Without dead ends: 406 [2019-12-27 19:07:10,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:07:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-12-27 19:07:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 147. [2019-12-27 19:07:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:10,122 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:10,123 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:10,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:10,123 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:10,123 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:10,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:10,324 INFO L410 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:10,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1925302678, now seen corresponding path program 278 times [2019-12-27 19:07:10,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:10,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132701102] [2019-12-27 19:07:10,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:10,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132701102] [2019-12-27 19:07:10,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925844222] [2019-12-27 19:07:10,402 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:10,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:10,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:10,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:10,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:07:10,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:10,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:10,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2086651591] [2019-12-27 19:07:10,488 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:10,488 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:10,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:10,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:10,491 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:10,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:10,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:10,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:10,491 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:10,765 INFO L93 Difference]: Finished difference Result 423 states and 983 transitions. [2019-12-27 19:07:10,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:07:10,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:10,766 INFO L225 Difference]: With dead ends: 423 [2019-12-27 19:07:10,767 INFO L226 Difference]: Without dead ends: 421 [2019-12-27 19:07:10,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:07:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-12-27 19:07:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 146. [2019-12-27 19:07:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:10,771 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:10,771 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:10,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:10,771 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:10,771 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:10,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:10,972 INFO L410 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -185238013, now seen corresponding path program 279 times [2019-12-27 19:07:10,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:10,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394905089] [2019-12-27 19:07:10,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:11,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394905089] [2019-12-27 19:07:11,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635170338] [2019-12-27 19:07:11,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:11,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:11,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:11,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:11,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:07:11,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:11,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:11,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [622840476] [2019-12-27 19:07:11,181 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:11,181 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:11,183 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:11,183 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:11,218 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:11,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:11,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:11,219 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 19:07:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:11,619 INFO L93 Difference]: Finished difference Result 455 states and 1047 transitions. [2019-12-27 19:07:11,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:07:11,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:11,621 INFO L225 Difference]: With dead ends: 455 [2019-12-27 19:07:11,621 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 19:07:11,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1243, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:07:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 19:07:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 148. [2019-12-27 19:07:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 19:07:11,625 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 19:07:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:11,625 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 19:07:11,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 19:07:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:11,626 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:11,626 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:11,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:11,826 INFO L410 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:11,827 INFO L82 PathProgramCache]: Analyzing trace with hash 773406576, now seen corresponding path program 280 times [2019-12-27 19:07:11,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:11,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503503441] [2019-12-27 19:07:11,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:11,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503503441] [2019-12-27 19:07:11,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708781890] [2019-12-27 19:07:11,903 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:11,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:11,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:11,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:11,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:07:12,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:12,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:12,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1606800246] [2019-12-27 19:07:12,008 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:12,008 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:12,010 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:12,010 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:12,011 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:12,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:12,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:12,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:12,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:12,011 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 19:07:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:12,319 INFO L93 Difference]: Finished difference Result 438 states and 1018 transitions. [2019-12-27 19:07:12,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:07:12,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:12,321 INFO L225 Difference]: With dead ends: 438 [2019-12-27 19:07:12,321 INFO L226 Difference]: Without dead ends: 436 [2019-12-27 19:07:12,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:07:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2019-12-27 19:07:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 148. [2019-12-27 19:07:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 19:07:12,325 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 19:07:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:12,325 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 19:07:12,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 19:07:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:12,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:12,325 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:12,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:12,526 INFO L410 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash -627637885, now seen corresponding path program 281 times [2019-12-27 19:07:12,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:12,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590694286] [2019-12-27 19:07:12,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:12,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590694286] [2019-12-27 19:07:12,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411321438] [2019-12-27 19:07:12,636 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:12,709 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:07:12,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:12,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:12,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:12,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:12,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:12,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335208640] [2019-12-27 19:07:12,769 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:12,770 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:12,771 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:12,771 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:12,772 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:12,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:12,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:12,773 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 19:07:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:13,071 INFO L93 Difference]: Finished difference Result 466 states and 1076 transitions. [2019-12-27 19:07:13,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:07:13,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:13,073 INFO L225 Difference]: With dead ends: 466 [2019-12-27 19:07:13,073 INFO L226 Difference]: Without dead ends: 464 [2019-12-27 19:07:13,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-12-27 19:07:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 145. [2019-12-27 19:07:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:07:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:07:13,077 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:07:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:13,077 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:07:13,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:07:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:13,077 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:13,077 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:13,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:13,278 INFO L410 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:13,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1870370237, now seen corresponding path program 282 times [2019-12-27 19:07:13,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:13,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944170374] [2019-12-27 19:07:13,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:13,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944170374] [2019-12-27 19:07:13,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910653770] [2019-12-27 19:07:13,357 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:13,420 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:07:13,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:13,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:13,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:13,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:13,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:13,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796509337] [2019-12-27 19:07:13,455 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:13,456 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:13,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:13,458 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:13,485 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:13,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:13,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:13,486 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 16 states. [2019-12-27 19:07:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:13,890 INFO L93 Difference]: Finished difference Result 449 states and 1033 transitions. [2019-12-27 19:07:13,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:13,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:13,891 INFO L225 Difference]: With dead ends: 449 [2019-12-27 19:07:13,891 INFO L226 Difference]: Without dead ends: 447 [2019-12-27 19:07:13,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:07:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-12-27 19:07:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 146. [2019-12-27 19:07:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:13,896 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:13,896 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:13,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:13,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:13,897 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:14,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:14,097 INFO L410 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1465952470, now seen corresponding path program 283 times [2019-12-27 19:07:14,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:14,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486303519] [2019-12-27 19:07:14,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:14,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486303519] [2019-12-27 19:07:14,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912803258] [2019-12-27 19:07:14,175 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:14,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:14,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:07:14,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:14,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:14,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1618788553] [2019-12-27 19:07:14,278 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:14,279 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:14,281 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:14,281 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:14,282 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:14,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:14,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:14,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:14,282 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:14,559 INFO L93 Difference]: Finished difference Result 418 states and 968 transitions. [2019-12-27 19:07:14,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:07:14,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:14,560 INFO L225 Difference]: With dead ends: 418 [2019-12-27 19:07:14,561 INFO L226 Difference]: Without dead ends: 416 [2019-12-27 19:07:14,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:07:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2019-12-27 19:07:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 146. [2019-12-27 19:07:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:14,565 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:14,565 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:14,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:14,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:14,565 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:14,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:14,766 INFO L410 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1427970365, now seen corresponding path program 284 times [2019-12-27 19:07:14,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:14,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315874853] [2019-12-27 19:07:14,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:14,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315874853] [2019-12-27 19:07:14,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146502121] [2019-12-27 19:07:14,841 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:14,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:14,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:14,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:14,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:14,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:14,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:14,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [162717804] [2019-12-27 19:07:14,940 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:14,941 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:14,943 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:14,943 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:14,943 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:14,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:14,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:14,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:14,944 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:15,274 INFO L93 Difference]: Finished difference Result 461 states and 1066 transitions. [2019-12-27 19:07:15,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:15,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:15,275 INFO L225 Difference]: With dead ends: 461 [2019-12-27 19:07:15,275 INFO L226 Difference]: Without dead ends: 459 [2019-12-27 19:07:15,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:07:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-12-27 19:07:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 145. [2019-12-27 19:07:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:07:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:07:15,279 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:07:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:15,279 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:07:15,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:07:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:15,280 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:15,280 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:15,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:15,481 INFO L410 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1948657801, now seen corresponding path program 285 times [2019-12-27 19:07:15,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:15,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843704678] [2019-12-27 19:07:15,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:15,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843704678] [2019-12-27 19:07:15,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636059836] [2019-12-27 19:07:15,558 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:15,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:15,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:15,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:15,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:15,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:15,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:15,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1906676115] [2019-12-27 19:07:15,684 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:15,685 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:15,687 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:15,687 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:15,687 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:15,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:15,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:15,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:15,688 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 19:07:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:16,019 INFO L93 Difference]: Finished difference Result 455 states and 1041 transitions. [2019-12-27 19:07:16,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:16,019 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:16,020 INFO L225 Difference]: With dead ends: 455 [2019-12-27 19:07:16,020 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 19:07:16,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 19:07:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 139. [2019-12-27 19:07:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 19:07:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 19:07:16,024 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 19 [2019-12-27 19:07:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:16,024 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 19:07:16,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 19:07:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:16,024 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:16,025 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:16,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:16,225 INFO L410 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1764840036, now seen corresponding path program 286 times [2019-12-27 19:07:16,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:16,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12393098] [2019-12-27 19:07:16,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:16,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12393098] [2019-12-27 19:07:16,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444347534] [2019-12-27 19:07:16,302 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:16,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:16,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:16,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:07:16,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:16,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:16,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:07:16,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [871833968] [2019-12-27 19:07:16,413 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:16,414 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:16,416 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 19:07:16,416 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:16,508 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:07:16,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:07:16,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:16,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:07:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:07:16,509 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 20 states. [2019-12-27 19:07:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:17,341 INFO L93 Difference]: Finished difference Result 519 states and 1166 transitions. [2019-12-27 19:07:17,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 19:07:17,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 19:07:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:17,342 INFO L225 Difference]: With dead ends: 519 [2019-12-27 19:07:17,342 INFO L226 Difference]: Without dead ends: 517 [2019-12-27 19:07:17,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=894, Invalid=2412, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 19:07:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2019-12-27 19:07:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 146. [2019-12-27 19:07:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:17,354 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:17,354 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:17,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:07:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:17,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:17,355 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:17,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:17,556 INFO L410 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash 740946057, now seen corresponding path program 287 times [2019-12-27 19:07:17,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:17,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334875930] [2019-12-27 19:07:17,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:17,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334875930] [2019-12-27 19:07:17,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021261842] [2019-12-27 19:07:17,633 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:17,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:07:17,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:17,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:17,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:17,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:17,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:17,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [424829452] [2019-12-27 19:07:17,753 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:17,753 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:17,755 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:17,755 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:17,820 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:07:17,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:17,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:17,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:07:17,821 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 18 states. [2019-12-27 19:07:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:18,391 INFO L93 Difference]: Finished difference Result 469 states and 1061 transitions. [2019-12-27 19:07:18,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:07:18,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:18,393 INFO L225 Difference]: With dead ends: 469 [2019-12-27 19:07:18,393 INFO L226 Difference]: Without dead ends: 467 [2019-12-27 19:07:18,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=677, Invalid=1675, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:07:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-12-27 19:07:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 147. [2019-12-27 19:07:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:18,397 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:18,398 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:18,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:18,398 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:18,398 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:18,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:18,599 INFO L410 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:18,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572554, now seen corresponding path program 288 times [2019-12-27 19:07:18,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:18,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379239841] [2019-12-27 19:07:18,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:18,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379239841] [2019-12-27 19:07:18,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927727102] [2019-12-27 19:07:18,692 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:18,762 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:18,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:18,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:18,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:07:18,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:18,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:18,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224289186] [2019-12-27 19:07:18,790 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:18,791 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:18,792 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:18,793 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:18,821 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:18,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:18,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:18,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:07:18,822 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 19:07:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:19,190 INFO L93 Difference]: Finished difference Result 421 states and 962 transitions. [2019-12-27 19:07:19,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:07:19,191 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:19,192 INFO L225 Difference]: With dead ends: 421 [2019-12-27 19:07:19,192 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 19:07:19,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:07:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 19:07:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 149. [2019-12-27 19:07:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 370 transitions. [2019-12-27 19:07:19,196 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 370 transitions. Word has length 19 [2019-12-27 19:07:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:19,197 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 370 transitions. [2019-12-27 19:07:19,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 370 transitions. [2019-12-27 19:07:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:19,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:19,197 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:19,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:19,398 INFO L410 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:19,398 INFO L82 PathProgramCache]: Analyzing trace with hash -460927965, now seen corresponding path program 289 times [2019-12-27 19:07:19,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:19,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109660784] [2019-12-27 19:07:19,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:19,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109660784] [2019-12-27 19:07:19,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459420901] [2019-12-27 19:07:19,481 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:19,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:07:19,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-12-27 19:07:19,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:19,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:07:19,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1186582239] [2019-12-27 19:07:19,559 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:19,560 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:19,561 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:07:19,562 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:19,562 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:19,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:19,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:19,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:07:19,563 INFO L87 Difference]: Start difference. First operand 149 states and 370 transitions. Second operand 14 states. [2019-12-27 19:07:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:19,760 INFO L93 Difference]: Finished difference Result 369 states and 854 transitions. [2019-12-27 19:07:19,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:07:19,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:19,762 INFO L225 Difference]: With dead ends: 369 [2019-12-27 19:07:19,762 INFO L226 Difference]: Without dead ends: 367 [2019-12-27 19:07:19,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:07:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-12-27 19:07:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 149. [2019-12-27 19:07:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 370 transitions. [2019-12-27 19:07:19,765 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 370 transitions. Word has length 19 [2019-12-27 19:07:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:19,766 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 370 transitions. [2019-12-27 19:07:19,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 370 transitions. [2019-12-27 19:07:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:19,766 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:19,766 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:19,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:19,967 INFO L410 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1861972426, now seen corresponding path program 290 times [2019-12-27 19:07:19,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:19,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901342600] [2019-12-27 19:07:19,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:20,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901342600] [2019-12-27 19:07:20,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286276495] [2019-12-27 19:07:20,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:20,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:20,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:20,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:20,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 19:07:20,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:20,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:20,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1987799052] [2019-12-27 19:07:20,140 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:20,140 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:20,142 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:20,142 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:20,142 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:20,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:20,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:20,143 INFO L87 Difference]: Start difference. First operand 149 states and 370 transitions. Second operand 14 states. [2019-12-27 19:07:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:20,438 INFO L93 Difference]: Finished difference Result 421 states and 974 transitions. [2019-12-27 19:07:20,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:07:20,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:20,439 INFO L225 Difference]: With dead ends: 421 [2019-12-27 19:07:20,439 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 19:07:20,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:07:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 19:07:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 148. [2019-12-27 19:07:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:20,443 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:20,443 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:20,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:20,443 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:20,443 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:20,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:20,644 INFO L410 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash -943633296, now seen corresponding path program 291 times [2019-12-27 19:07:20,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:20,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242425893] [2019-12-27 19:07:20,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:20,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242425893] [2019-12-27 19:07:20,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98140516] [2019-12-27 19:07:20,725 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:20,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:20,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:20,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:20,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:07:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:20,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:20,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1007761704] [2019-12-27 19:07:20,820 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:20,821 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:20,822 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:20,822 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:20,823 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:20,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:20,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:20,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:20,823 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:21,123 INFO L93 Difference]: Finished difference Result 428 states and 987 transitions. [2019-12-27 19:07:21,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:07:21,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:21,125 INFO L225 Difference]: With dead ends: 428 [2019-12-27 19:07:21,125 INFO L226 Difference]: Without dead ends: 426 [2019-12-27 19:07:21,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:07:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2019-12-27 19:07:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 147. [2019-12-27 19:07:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:21,129 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:21,129 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:21,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:21,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:21,130 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:21,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:21,331 INFO L410 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:21,331 INFO L82 PathProgramCache]: Analyzing trace with hash 796431369, now seen corresponding path program 292 times [2019-12-27 19:07:21,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:21,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590788242] [2019-12-27 19:07:21,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:21,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590788242] [2019-12-27 19:07:21,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27309088] [2019-12-27 19:07:21,411 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:21,471 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:21,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:21,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:21,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:21,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:21,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:21,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1510906990] [2019-12-27 19:07:21,505 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:21,506 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:21,507 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:21,508 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:21,534 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:21,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:21,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:21,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:21,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:21,535 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 19:07:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:21,937 INFO L93 Difference]: Finished difference Result 455 states and 1037 transitions. [2019-12-27 19:07:21,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:21,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:21,939 INFO L225 Difference]: With dead ends: 455 [2019-12-27 19:07:21,939 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 19:07:21,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:07:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 19:07:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 149. [2019-12-27 19:07:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 19:07:21,943 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 19:07:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:21,943 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 19:07:21,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 19:07:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:21,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:21,944 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:22,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:22,145 INFO L410 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1755075958, now seen corresponding path program 293 times [2019-12-27 19:07:22,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:22,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605048632] [2019-12-27 19:07:22,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:22,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605048632] [2019-12-27 19:07:22,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80481400] [2019-12-27 19:07:22,238 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:22,304 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:07:22,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:22,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:22,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 19:07:22,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:22,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:22,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [305053018] [2019-12-27 19:07:22,336 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:22,337 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:22,338 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:22,339 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:22,339 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:22,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:22,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:22,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:22,340 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 19:07:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:22,631 INFO L93 Difference]: Finished difference Result 438 states and 1006 transitions. [2019-12-27 19:07:22,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:07:22,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:22,633 INFO L225 Difference]: With dead ends: 438 [2019-12-27 19:07:22,633 INFO L226 Difference]: Without dead ends: 436 [2019-12-27 19:07:22,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:07:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2019-12-27 19:07:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 149. [2019-12-27 19:07:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 19:07:22,637 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 19:07:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:22,637 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 19:07:22,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 19:07:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:22,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:22,638 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:22,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:22,838 INFO L410 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash 354031497, now seen corresponding path program 294 times [2019-12-27 19:07:22,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:22,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662027971] [2019-12-27 19:07:22,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:22,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662027971] [2019-12-27 19:07:22,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454573561] [2019-12-27 19:07:22,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:22,980 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:22,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:22,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:22,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:23,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:23,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:23,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123409960] [2019-12-27 19:07:23,038 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:23,038 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:23,040 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:23,040 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:23,041 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:23,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:23,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:23,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:23,041 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 19:07:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:23,376 INFO L93 Difference]: Finished difference Result 462 states and 1062 transitions. [2019-12-27 19:07:23,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:23,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:23,377 INFO L225 Difference]: With dead ends: 462 [2019-12-27 19:07:23,378 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 19:07:23,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 19:07:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 146. [2019-12-27 19:07:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:23,382 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:23,382 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:23,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:23,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:23,383 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:23,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:23,584 INFO L410 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:23,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1442927677, now seen corresponding path program 295 times [2019-12-27 19:07:23,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:23,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426250610] [2019-12-27 19:07:23,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:23,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426250610] [2019-12-27 19:07:23,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250736417] [2019-12-27 19:07:23,660 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:23,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:23,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:07:23,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:23,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:23,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [168812008] [2019-12-27 19:07:23,770 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:23,770 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:23,772 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:23,772 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:23,803 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:23,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:23,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:23,804 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 19:07:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:24,255 INFO L93 Difference]: Finished difference Result 456 states and 1043 transitions. [2019-12-27 19:07:24,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:07:24,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:24,256 INFO L225 Difference]: With dead ends: 456 [2019-12-27 19:07:24,257 INFO L226 Difference]: Without dead ends: 454 [2019-12-27 19:07:24,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=1364, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:07:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-12-27 19:07:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 147. [2019-12-27 19:07:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:24,261 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:24,261 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:24,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:24,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:24,262 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:24,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:24,462 INFO L410 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash -484283088, now seen corresponding path program 296 times [2019-12-27 19:07:24,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:24,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91762621] [2019-12-27 19:07:24,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:24,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91762621] [2019-12-27 19:07:24,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557722910] [2019-12-27 19:07:24,541 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:24,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:24,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:24,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:24,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:07:24,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:24,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:24,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [622294329] [2019-12-27 19:07:24,630 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:24,631 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:24,632 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:24,632 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:24,633 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:24,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:24,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:24,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:24,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:24,633 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:24,935 INFO L93 Difference]: Finished difference Result 433 states and 998 transitions. [2019-12-27 19:07:24,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:07:24,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:24,936 INFO L225 Difference]: With dead ends: 433 [2019-12-27 19:07:24,936 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 19:07:24,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:07:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 19:07:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 147. [2019-12-27 19:07:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:24,941 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:24,941 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:24,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:24,941 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:24,941 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:25,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:25,142 INFO L410 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1885327549, now seen corresponding path program 297 times [2019-12-27 19:07:25,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:25,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164470730] [2019-12-27 19:07:25,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:25,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164470730] [2019-12-27 19:07:25,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755808691] [2019-12-27 19:07:25,224 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:25,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:07:25,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:25,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:25,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:25,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:25,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:25,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1643985624] [2019-12-27 19:07:25,327 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:25,328 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:25,330 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:25,330 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:25,331 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:25,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:25,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:25,331 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:25,676 INFO L93 Difference]: Finished difference Result 455 states and 1048 transitions. [2019-12-27 19:07:25,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:07:25,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:25,677 INFO L225 Difference]: With dead ends: 455 [2019-12-27 19:07:25,678 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 19:07:25,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:07:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 19:07:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 146. [2019-12-27 19:07:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:25,682 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:25,682 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:25,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:25,683 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:25,683 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:25,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:25,883 INFO L410 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:25,884 INFO L82 PathProgramCache]: Analyzing trace with hash -966988419, now seen corresponding path program 298 times [2019-12-27 19:07:25,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:25,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067007293] [2019-12-27 19:07:25,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:25,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067007293] [2019-12-27 19:07:25,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897914761] [2019-12-27 19:07:25,999 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:26,055 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:26,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:26,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:26,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:26,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:26,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:26,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157920280] [2019-12-27 19:07:26,092 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:26,092 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:26,094 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:26,094 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:26,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:26,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:26,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:26,095 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:26,428 INFO L93 Difference]: Finished difference Result 472 states and 1086 transitions. [2019-12-27 19:07:26,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:07:26,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:26,429 INFO L225 Difference]: With dead ends: 472 [2019-12-27 19:07:26,429 INFO L226 Difference]: Without dead ends: 470 [2019-12-27 19:07:26,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:07:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-12-27 19:07:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 141. [2019-12-27 19:07:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:07:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 19:07:26,434 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 19 [2019-12-27 19:07:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:26,434 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 19:07:26,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 19:07:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:26,435 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:26,435 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:26,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:26,639 INFO L410 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 16937244, now seen corresponding path program 299 times [2019-12-27 19:07:26,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:26,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21658402] [2019-12-27 19:07:26,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:26,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21658402] [2019-12-27 19:07:26,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481756370] [2019-12-27 19:07:26,712 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:26,777 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:07:26,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:26,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:26,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:26,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:26,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:26,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [149665002] [2019-12-27 19:07:26,813 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:26,815 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:26,817 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:26,817 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:26,876 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:07:26,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:26,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:26,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:26,877 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 18 states. [2019-12-27 19:07:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:27,453 INFO L93 Difference]: Finished difference Result 501 states and 1132 transitions. [2019-12-27 19:07:27,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:07:27,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:27,455 INFO L225 Difference]: With dead ends: 501 [2019-12-27 19:07:27,455 INFO L226 Difference]: Without dead ends: 499 [2019-12-27 19:07:27,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=701, Invalid=1651, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:07:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-12-27 19:07:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 146. [2019-12-27 19:07:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:27,460 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:27,460 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:27,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:27,460 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:27,461 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:27,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:27,661 INFO L410 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:27,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2143581367, now seen corresponding path program 300 times [2019-12-27 19:07:27,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:27,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193345142] [2019-12-27 19:07:27,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:27,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193345142] [2019-12-27 19:07:27,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258196513] [2019-12-27 19:07:27,740 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:27,805 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:07:27,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:27,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:27,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:07:27,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:27,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:27,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [343029343] [2019-12-27 19:07:27,842 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:27,852 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:27,854 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:27,854 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:27,882 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:27,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:27,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:27,884 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 19:07:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:28,325 INFO L93 Difference]: Finished difference Result 462 states and 1053 transitions. [2019-12-27 19:07:28,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:07:28,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:28,326 INFO L225 Difference]: With dead ends: 462 [2019-12-27 19:07:28,326 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 19:07:28,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:07:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 19:07:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 147. [2019-12-27 19:07:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:28,329 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:28,330 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:28,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:28,330 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:28,330 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:28,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:28,531 INFO L410 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1184936778, now seen corresponding path program 301 times [2019-12-27 19:07:28,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:28,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72657593] [2019-12-27 19:07:28,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:28,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72657593] [2019-12-27 19:07:28,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504496989] [2019-12-27 19:07:28,607 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:28,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:28,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:07:28,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:28,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:28,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1926269780] [2019-12-27 19:07:28,694 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:28,694 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:28,696 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:28,696 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:28,696 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:28,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:28,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:28,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:28,697 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:29,003 INFO L93 Difference]: Finished difference Result 428 states and 980 transitions. [2019-12-27 19:07:29,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:07:29,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:29,005 INFO L225 Difference]: With dead ends: 428 [2019-12-27 19:07:29,005 INFO L226 Difference]: Without dead ends: 426 [2019-12-27 19:07:29,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:07:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2019-12-27 19:07:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 147. [2019-12-27 19:07:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:29,008 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:29,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:29,008 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:29,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:29,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:29,009 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:29,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:29,210 INFO L410 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:29,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1708986057, now seen corresponding path program 302 times [2019-12-27 19:07:29,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:29,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186585381] [2019-12-27 19:07:29,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:29,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186585381] [2019-12-27 19:07:29,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915020939] [2019-12-27 19:07:29,288 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:29,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:29,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:29,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:29,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:29,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:29,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:29,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1901800625] [2019-12-27 19:07:29,395 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:29,396 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:29,398 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:29,398 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:29,398 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:29,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:29,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:29,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:29,399 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:29,746 INFO L93 Difference]: Finished difference Result 465 states and 1068 transitions. [2019-12-27 19:07:29,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:29,747 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:29,748 INFO L225 Difference]: With dead ends: 465 [2019-12-27 19:07:29,748 INFO L226 Difference]: Without dead ends: 463 [2019-12-27 19:07:29,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-12-27 19:07:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 146. [2019-12-27 19:07:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:29,752 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:29,752 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:29,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:29,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:29,753 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:29,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:29,954 INFO L410 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1667642109, now seen corresponding path program 303 times [2019-12-27 19:07:29,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:29,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484481256] [2019-12-27 19:07:29,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:30,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484481256] [2019-12-27 19:07:30,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866998709] [2019-12-27 19:07:30,033 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:30,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:30,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:30,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:30,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:30,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:30,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:30,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1604881324] [2019-12-27 19:07:30,163 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:30,163 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:30,165 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:30,165 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:30,165 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:30,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:30,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:30,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:30,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:30,165 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:30,538 INFO L93 Difference]: Finished difference Result 477 states and 1092 transitions. [2019-12-27 19:07:30,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:30,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:30,539 INFO L225 Difference]: With dead ends: 477 [2019-12-27 19:07:30,539 INFO L226 Difference]: Without dead ends: 475 [2019-12-27 19:07:30,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:07:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-12-27 19:07:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 143. [2019-12-27 19:07:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:07:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-27 19:07:30,544 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 19 [2019-12-27 19:07:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:30,544 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-27 19:07:30,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-27 19:07:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:30,545 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:30,545 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:30,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:30,745 INFO L410 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:30,746 INFO L82 PathProgramCache]: Analyzing trace with hash 72422556, now seen corresponding path program 304 times [2019-12-27 19:07:30,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:30,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13438265] [2019-12-27 19:07:30,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:30,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13438265] [2019-12-27 19:07:30,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864201575] [2019-12-27 19:07:30,821 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:30,880 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:30,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:30,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:07:30,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:30,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:30,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:07:30,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155637032] [2019-12-27 19:07:30,926 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:30,927 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:30,929 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:30,929 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:30,958 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:07:30,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:30,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:07:30,959 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-27 19:07:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:31,412 INFO L93 Difference]: Finished difference Result 494 states and 1121 transitions. [2019-12-27 19:07:31,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:07:31,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:31,414 INFO L225 Difference]: With dead ends: 494 [2019-12-27 19:07:31,414 INFO L226 Difference]: Without dead ends: 492 [2019-12-27 19:07:31,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:07:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-12-27 19:07:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 146. [2019-12-27 19:07:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:31,418 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:31,419 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:31,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:31,419 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:31,419 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:31,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:31,620 INFO L410 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1031067145, now seen corresponding path program 305 times [2019-12-27 19:07:31,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:31,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138559044] [2019-12-27 19:07:31,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:31,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138559044] [2019-12-27 19:07:31,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919480592] [2019-12-27 19:07:31,700 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:31,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:07:31,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:31,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:31,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:07:31,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:31,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:31,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1571635689] [2019-12-27 19:07:31,795 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:31,795 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:31,797 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:31,797 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:31,797 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:31,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:31,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:31,798 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:32,163 INFO L93 Difference]: Finished difference Result 482 states and 1097 transitions. [2019-12-27 19:07:32,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:32,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:32,164 INFO L225 Difference]: With dead ends: 482 [2019-12-27 19:07:32,164 INFO L226 Difference]: Without dead ends: 480 [2019-12-27 19:07:32,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-12-27 19:07:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 145. [2019-12-27 19:07:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:07:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:07:32,168 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:07:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:32,168 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:07:32,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:07:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:32,168 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:32,168 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:32,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:32,372 INFO L410 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:32,372 INFO L82 PathProgramCache]: Analyzing trace with hash -369977316, now seen corresponding path program 306 times [2019-12-27 19:07:32,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:32,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662411631] [2019-12-27 19:07:32,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:32,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662411631] [2019-12-27 19:07:32,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047676995] [2019-12-27 19:07:32,483 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:32,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:32,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:32,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:32,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 19:07:32,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:32,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:32,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2001692728] [2019-12-27 19:07:32,591 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:32,592 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:32,594 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:32,595 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:32,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:07:32,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:32,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:32,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:32,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:32,596 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 19:07:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:32,927 INFO L93 Difference]: Finished difference Result 499 states and 1130 transitions. [2019-12-27 19:07:32,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:32,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:32,928 INFO L225 Difference]: With dead ends: 499 [2019-12-27 19:07:32,929 INFO L226 Difference]: Without dead ends: 497 [2019-12-27 19:07:32,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2019-12-27 19:07:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 139. [2019-12-27 19:07:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 19:07:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 19:07:32,932 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 19 [2019-12-27 19:07:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:32,932 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 19:07:32,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 19:07:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:32,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:32,933 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:33,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:33,134 INFO L410 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:33,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1397860266, now seen corresponding path program 307 times [2019-12-27 19:07:33,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:33,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856377075] [2019-12-27 19:07:33,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:33,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856377075] [2019-12-27 19:07:33,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362593700] [2019-12-27 19:07:33,205 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:33,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:33,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:07:33,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:33,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:33,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [165405118] [2019-12-27 19:07:33,307 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:33,309 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:33,311 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:33,311 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:33,422 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 19:07:33,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:07:33,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:07:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:07:33,423 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 20 states. [2019-12-27 19:07:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:34,247 INFO L93 Difference]: Finished difference Result 518 states and 1165 transitions. [2019-12-27 19:07:34,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 19:07:34,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 19:07:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:34,248 INFO L225 Difference]: With dead ends: 518 [2019-12-27 19:07:34,248 INFO L226 Difference]: Without dead ends: 516 [2019-12-27 19:07:34,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=976, Invalid=2330, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 19:07:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2019-12-27 19:07:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 147. [2019-12-27 19:07:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:34,253 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:34,253 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:34,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:07:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:34,253 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:34,253 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:34,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:34,454 INFO L410 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1107925827, now seen corresponding path program 308 times [2019-12-27 19:07:34,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:34,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564368341] [2019-12-27 19:07:34,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:34,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564368341] [2019-12-27 19:07:34,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881442674] [2019-12-27 19:07:34,543 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:34,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:34,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:34,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:34,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:34,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:34,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:34,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [841856471] [2019-12-27 19:07:34,654 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:34,655 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:34,656 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:34,656 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:34,722 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:34,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:34,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:07:34,723 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 18 states. [2019-12-27 19:07:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:35,307 INFO L93 Difference]: Finished difference Result 477 states and 1083 transitions. [2019-12-27 19:07:35,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:07:35,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:35,309 INFO L225 Difference]: With dead ends: 477 [2019-12-27 19:07:35,309 INFO L226 Difference]: Without dead ends: 475 [2019-12-27 19:07:35,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=710, Invalid=1740, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:07:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-12-27 19:07:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 148. [2019-12-27 19:07:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:35,313 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:35,313 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:35,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:35,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:35,314 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:35,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:35,514 INFO L410 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1052592784, now seen corresponding path program 309 times [2019-12-27 19:07:35,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:35,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387315990] [2019-12-27 19:07:35,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:35,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387315990] [2019-12-27 19:07:35,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821587374] [2019-12-27 19:07:35,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:35,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:07:35,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:35,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:35,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:07:35,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:35,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:35,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [507440206] [2019-12-27 19:07:35,678 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:35,679 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:35,680 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:35,681 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:35,709 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:35,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:35,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:07:35,710 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 16 states. [2019-12-27 19:07:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:36,094 INFO L93 Difference]: Finished difference Result 416 states and 954 transitions. [2019-12-27 19:07:36,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:36,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:36,095 INFO L225 Difference]: With dead ends: 416 [2019-12-27 19:07:36,095 INFO L226 Difference]: Without dead ends: 414 [2019-12-27 19:07:36,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1085, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:07:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2019-12-27 19:07:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 150. [2019-12-27 19:07:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 19:07:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 374 transitions. [2019-12-27 19:07:36,100 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 374 transitions. Word has length 19 [2019-12-27 19:07:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:36,100 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 374 transitions. [2019-12-27 19:07:36,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 374 transitions. [2019-12-27 19:07:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:36,101 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:36,101 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:36,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:36,302 INFO L410 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash -93948195, now seen corresponding path program 310 times [2019-12-27 19:07:36,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:36,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855120548] [2019-12-27 19:07:36,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:36,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855120548] [2019-12-27 19:07:36,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354642320] [2019-12-27 19:07:36,378 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:36,436 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:36,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:36,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:07:36,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-27 19:07:36,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:36,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 19:07:36,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [761796323] [2019-12-27 19:07:36,454 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:36,455 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:36,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 19:07:36,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:36,457 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:36,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:36,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:07:36,458 INFO L87 Difference]: Start difference. First operand 150 states and 374 transitions. Second operand 14 states. [2019-12-27 19:07:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:36,689 INFO L93 Difference]: Finished difference Result 357 states and 826 transitions. [2019-12-27 19:07:36,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:07:36,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:36,691 INFO L225 Difference]: With dead ends: 357 [2019-12-27 19:07:36,691 INFO L226 Difference]: Without dead ends: 355 [2019-12-27 19:07:36,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:07:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-12-27 19:07:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 150. [2019-12-27 19:07:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 19:07:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 374 transitions. [2019-12-27 19:07:36,694 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 374 transitions. Word has length 19 [2019-12-27 19:07:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:36,694 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 374 transitions. [2019-12-27 19:07:36,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 374 transitions. [2019-12-27 19:07:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:36,694 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:36,695 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:36,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:36,895 INFO L410 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1494992656, now seen corresponding path program 311 times [2019-12-27 19:07:36,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:36,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945470842] [2019-12-27 19:07:36,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:36,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945470842] [2019-12-27 19:07:36,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235208224] [2019-12-27 19:07:36,974 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:37,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:07:37,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:37,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:37,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:07:37,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:37,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:37,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [70349262] [2019-12-27 19:07:37,061 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:37,062 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:37,064 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:37,064 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:37,064 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:37,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:37,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:37,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:37,065 INFO L87 Difference]: Start difference. First operand 150 states and 374 transitions. Second operand 14 states. [2019-12-27 19:07:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:37,376 INFO L93 Difference]: Finished difference Result 422 states and 971 transitions. [2019-12-27 19:07:37,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:37,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:37,378 INFO L225 Difference]: With dead ends: 422 [2019-12-27 19:07:37,378 INFO L226 Difference]: Without dead ends: 420 [2019-12-27 19:07:37,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-12-27 19:07:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 149. [2019-12-27 19:07:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:07:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 370 transitions. [2019-12-27 19:07:37,382 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 370 transitions. Word has length 19 [2019-12-27 19:07:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:37,382 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 370 transitions. [2019-12-27 19:07:37,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 370 transitions. [2019-12-27 19:07:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:37,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:37,383 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:37,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:37,584 INFO L410 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:37,584 INFO L82 PathProgramCache]: Analyzing trace with hash -576653526, now seen corresponding path program 312 times [2019-12-27 19:07:37,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:37,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356972919] [2019-12-27 19:07:37,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:37,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356972919] [2019-12-27 19:07:37,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885489911] [2019-12-27 19:07:37,661 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:37,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:37,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:37,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:37,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:07:37,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:37,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:37,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2028394210] [2019-12-27 19:07:37,766 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:37,767 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:37,768 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:37,768 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:37,769 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:37,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:37,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:37,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:37,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:37,769 INFO L87 Difference]: Start difference. First operand 149 states and 370 transitions. Second operand 14 states. [2019-12-27 19:07:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:38,086 INFO L93 Difference]: Finished difference Result 436 states and 1007 transitions. [2019-12-27 19:07:38,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:38,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:38,088 INFO L225 Difference]: With dead ends: 436 [2019-12-27 19:07:38,088 INFO L226 Difference]: Without dead ends: 434 [2019-12-27 19:07:38,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2019-12-27 19:07:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 148. [2019-12-27 19:07:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:38,091 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:38,091 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:38,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:38,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:38,092 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:38,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:38,293 INFO L410 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1163411139, now seen corresponding path program 313 times [2019-12-27 19:07:38,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:38,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775450852] [2019-12-27 19:07:38,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:38,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775450852] [2019-12-27 19:07:38,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521667692] [2019-12-27 19:07:38,372 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:38,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:07:38,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:07:38,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:38,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 19:07:38,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [873647245] [2019-12-27 19:07:38,491 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:38,492 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:38,494 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:38,494 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:38,525 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:38,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:38,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:38,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:38,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:38,527 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 16 states. [2019-12-27 19:07:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:38,980 INFO L93 Difference]: Finished difference Result 461 states and 1048 transitions. [2019-12-27 19:07:38,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:07:38,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:38,981 INFO L225 Difference]: With dead ends: 461 [2019-12-27 19:07:38,981 INFO L226 Difference]: Without dead ends: 459 [2019-12-27 19:07:38,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=1360, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:07:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-12-27 19:07:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 150. [2019-12-27 19:07:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 19:07:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 373 transitions. [2019-12-27 19:07:38,986 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 373 transitions. Word has length 19 [2019-12-27 19:07:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:38,986 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 373 transitions. [2019-12-27 19:07:38,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 373 transitions. [2019-12-27 19:07:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:38,986 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:38,986 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:39,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:39,187 INFO L410 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2122055728, now seen corresponding path program 314 times [2019-12-27 19:07:39,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:39,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917924423] [2019-12-27 19:07:39,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:39,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917924423] [2019-12-27 19:07:39,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173410951] [2019-12-27 19:07:39,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:39,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:39,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:39,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:39,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:07:39,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:39,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:39,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [361968550] [2019-12-27 19:07:39,365 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:39,366 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:39,367 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:39,367 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:39,368 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:39,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:39,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:39,368 INFO L87 Difference]: Start difference. First operand 150 states and 373 transitions. Second operand 14 states. [2019-12-27 19:07:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:39,680 INFO L93 Difference]: Finished difference Result 441 states and 1011 transitions. [2019-12-27 19:07:39,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:39,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:39,681 INFO L225 Difference]: With dead ends: 441 [2019-12-27 19:07:39,682 INFO L226 Difference]: Without dead ends: 439 [2019-12-27 19:07:39,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2019-12-27 19:07:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 150. [2019-12-27 19:07:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 19:07:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 373 transitions. [2019-12-27 19:07:39,686 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 373 transitions. Word has length 19 [2019-12-27 19:07:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:39,686 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 373 transitions. [2019-12-27 19:07:39,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 373 transitions. [2019-12-27 19:07:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:39,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:39,687 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:39,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:39,887 INFO L410 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:39,888 INFO L82 PathProgramCache]: Analyzing trace with hash 721011267, now seen corresponding path program 315 times [2019-12-27 19:07:39,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:39,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423253959] [2019-12-27 19:07:39,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:39,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423253959] [2019-12-27 19:07:39,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365599564] [2019-12-27 19:07:39,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:40,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:40,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:40,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:40,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:40,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:40,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:40,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1814018010] [2019-12-27 19:07:40,073 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:40,074 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:40,075 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:40,075 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:40,076 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:40,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:40,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:40,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:40,076 INFO L87 Difference]: Start difference. First operand 150 states and 373 transitions. Second operand 14 states. [2019-12-27 19:07:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:40,412 INFO L93 Difference]: Finished difference Result 472 states and 1077 transitions. [2019-12-27 19:07:40,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:07:40,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:40,413 INFO L225 Difference]: With dead ends: 472 [2019-12-27 19:07:40,413 INFO L226 Difference]: Without dead ends: 470 [2019-12-27 19:07:40,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:07:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-12-27 19:07:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 147. [2019-12-27 19:07:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:40,417 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:40,417 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:40,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:40,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:40,418 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:40,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:40,619 INFO L410 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1075947907, now seen corresponding path program 316 times [2019-12-27 19:07:40,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:40,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116728193] [2019-12-27 19:07:40,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:40,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116728193] [2019-12-27 19:07:40,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011828376] [2019-12-27 19:07:40,699 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:40,754 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:40,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:40,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:40,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:40,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:40,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:40,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245251009] [2019-12-27 19:07:40,792 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:40,793 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:40,794 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:40,795 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:40,833 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:40,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:40,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:40,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:40,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:40,834 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 19:07:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:41,271 INFO L93 Difference]: Finished difference Result 463 states and 1059 transitions. [2019-12-27 19:07:41,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:07:41,272 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:41,273 INFO L225 Difference]: With dead ends: 463 [2019-12-27 19:07:41,273 INFO L226 Difference]: Without dead ends: 461 [2019-12-27 19:07:41,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=525, Invalid=1281, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:07:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2019-12-27 19:07:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 148. [2019-12-27 19:07:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:41,277 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:41,277 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:41,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:41,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:41,278 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:41,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:41,479 INFO L410 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash -117303318, now seen corresponding path program 317 times [2019-12-27 19:07:41,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:41,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979156198] [2019-12-27 19:07:41,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:41,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979156198] [2019-12-27 19:07:41,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287191480] [2019-12-27 19:07:41,555 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:41,616 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:07:41,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:41,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:41,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:07:41,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:41,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:41,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [997312860] [2019-12-27 19:07:41,644 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:41,645 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:41,647 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:41,647 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:41,647 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:41,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:41,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:41,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:41,648 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:41,972 INFO L93 Difference]: Finished difference Result 439 states and 1013 transitions. [2019-12-27 19:07:41,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:41,972 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:41,973 INFO L225 Difference]: With dead ends: 439 [2019-12-27 19:07:41,973 INFO L226 Difference]: Without dead ends: 437 [2019-12-27 19:07:41,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-12-27 19:07:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 148. [2019-12-27 19:07:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:41,978 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:41,978 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:41,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:41,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:41,978 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:42,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:42,179 INFO L410 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1518347779, now seen corresponding path program 318 times [2019-12-27 19:07:42,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:42,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512941449] [2019-12-27 19:07:42,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:42,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512941449] [2019-12-27 19:07:42,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842302126] [2019-12-27 19:07:42,261 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:42,331 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:42,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:42,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:42,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:42,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:42,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:42,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1058131436] [2019-12-27 19:07:42,365 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:42,365 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:42,368 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:42,368 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:42,368 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:42,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:42,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:42,369 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:42,717 INFO L93 Difference]: Finished difference Result 462 states and 1064 transitions. [2019-12-27 19:07:42,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:42,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:42,719 INFO L225 Difference]: With dead ends: 462 [2019-12-27 19:07:42,719 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 19:07:42,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 19:07:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 147. [2019-12-27 19:07:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:42,723 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:42,723 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:42,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:42,724 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:42,724 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:42,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:42,924 INFO L410 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -600008649, now seen corresponding path program 319 times [2019-12-27 19:07:42,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:42,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982843278] [2019-12-27 19:07:42,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:43,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982843278] [2019-12-27 19:07:43,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719326896] [2019-12-27 19:07:43,002 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:43,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:43,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:43,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:43,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:43,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [423435150] [2019-12-27 19:07:43,099 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:43,099 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:43,101 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:43,101 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:43,101 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:43,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:43,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:43,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:43,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:43,102 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:43,450 INFO L93 Difference]: Finished difference Result 479 states and 1102 transitions. [2019-12-27 19:07:43,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:07:43,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:43,451 INFO L225 Difference]: With dead ends: 479 [2019-12-27 19:07:43,451 INFO L226 Difference]: Without dead ends: 477 [2019-12-27 19:07:43,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:07:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2019-12-27 19:07:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 142. [2019-12-27 19:07:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 19:07:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-27 19:07:43,455 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 19 [2019-12-27 19:07:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:43,455 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-27 19:07:43,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-27 19:07:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:43,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:43,456 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:43,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:43,656 INFO L410 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash 383917014, now seen corresponding path program 320 times [2019-12-27 19:07:43,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:43,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646301437] [2019-12-27 19:07:43,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:43,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646301437] [2019-12-27 19:07:43,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108709723] [2019-12-27 19:07:43,739 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:43,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:43,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:43,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:43,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:43,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:43,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:43,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [669986992] [2019-12-27 19:07:43,834 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:43,835 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:43,836 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:43,837 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:43,898 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:43,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:43,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:43,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:07:43,899 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 18 states. [2019-12-27 19:07:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:44,521 INFO L93 Difference]: Finished difference Result 484 states and 1093 transitions. [2019-12-27 19:07:44,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:07:44,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:44,523 INFO L225 Difference]: With dead ends: 484 [2019-12-27 19:07:44,523 INFO L226 Difference]: Without dead ends: 482 [2019-12-27 19:07:44,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=737, Invalid=1713, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:07:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2019-12-27 19:07:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 147. [2019-12-27 19:07:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:44,528 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:44,528 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:44,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:44,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:44,528 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:44,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:44,729 INFO L410 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1776601597, now seen corresponding path program 321 times [2019-12-27 19:07:44,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:44,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715836148] [2019-12-27 19:07:44,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:44,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715836148] [2019-12-27 19:07:44,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253333572] [2019-12-27 19:07:44,807 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:44,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:07:44,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:44,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:44,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:44,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:44,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:44,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1352409702] [2019-12-27 19:07:44,912 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:44,913 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:44,915 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:44,915 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:44,943 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:44,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:44,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:44,944 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 19:07:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:45,388 INFO L93 Difference]: Finished difference Result 463 states and 1056 transitions. [2019-12-27 19:07:45,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:07:45,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:45,389 INFO L225 Difference]: With dead ends: 463 [2019-12-27 19:07:45,390 INFO L226 Difference]: Without dead ends: 461 [2019-12-27 19:07:45,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=549, Invalid=1343, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:07:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2019-12-27 19:07:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 148. [2019-12-27 19:07:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:45,393 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:45,393 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:45,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:45,394 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:45,394 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:45,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:45,595 INFO L410 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash -817957008, now seen corresponding path program 322 times [2019-12-27 19:07:45,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:45,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937529272] [2019-12-27 19:07:45,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:45,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937529272] [2019-12-27 19:07:45,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148701275] [2019-12-27 19:07:45,672 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:45,732 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:45,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:45,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:45,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:07:45,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:45,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:45,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1050559018] [2019-12-27 19:07:45,758 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:45,758 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:45,760 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 19:07:45,760 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:45,760 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:45,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:45,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:45,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:45,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:45,761 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:46,094 INFO L93 Difference]: Finished difference Result 435 states and 1001 transitions. [2019-12-27 19:07:46,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:46,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:46,095 INFO L225 Difference]: With dead ends: 435 [2019-12-27 19:07:46,095 INFO L226 Difference]: Without dead ends: 433 [2019-12-27 19:07:46,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-12-27 19:07:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 148. [2019-12-27 19:07:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:46,099 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:46,099 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:46,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:46,099 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:46,099 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:46,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:46,300 INFO L410 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:46,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2075965827, now seen corresponding path program 323 times [2019-12-27 19:07:46,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:46,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594584375] [2019-12-27 19:07:46,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:46,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594584375] [2019-12-27 19:07:46,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303980978] [2019-12-27 19:07:46,394 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:46,455 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:07:46,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:46,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:46,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:07:46,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:46,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:46,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [607733599] [2019-12-27 19:07:46,490 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:46,490 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:46,492 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:46,492 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:46,493 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:46,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:46,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:46,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:46,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:46,494 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:46,867 INFO L93 Difference]: Finished difference Result 461 states and 1060 transitions. [2019-12-27 19:07:46,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:07:46,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:46,869 INFO L225 Difference]: With dead ends: 461 [2019-12-27 19:07:46,869 INFO L226 Difference]: Without dead ends: 459 [2019-12-27 19:07:46,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:07:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-12-27 19:07:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 147. [2019-12-27 19:07:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:46,873 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:46,873 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:46,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:46,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:46,873 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:47,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:47,074 INFO L410 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1300662339, now seen corresponding path program 324 times [2019-12-27 19:07:47,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:47,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372786808] [2019-12-27 19:07:47,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:47,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372786808] [2019-12-27 19:07:47,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114706952] [2019-12-27 19:07:47,153 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:47,223 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:07:47,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:47,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:47,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:47,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:47,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:47,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1644578747] [2019-12-27 19:07:47,259 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:47,260 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:47,261 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:47,261 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:47,261 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:47,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:47,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:47,262 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:47,636 INFO L93 Difference]: Finished difference Result 460 states and 1055 transitions. [2019-12-27 19:07:47,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:07:47,636 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:47,637 INFO L225 Difference]: With dead ends: 460 [2019-12-27 19:07:47,637 INFO L226 Difference]: Without dead ends: 458 [2019-12-27 19:07:47,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:07:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-12-27 19:07:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 144. [2019-12-27 19:07:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:07:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-27 19:07:47,641 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 19 [2019-12-27 19:07:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:47,642 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-27 19:07:47,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-27 19:07:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:47,642 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:47,642 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:47,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:47,843 INFO L410 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash 439402326, now seen corresponding path program 325 times [2019-12-27 19:07:47,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:47,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763885540] [2019-12-27 19:07:47,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:47,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763885540] [2019-12-27 19:07:47,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273522786] [2019-12-27 19:07:47,918 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:47,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:47,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:48,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:48,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:48,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224035292] [2019-12-27 19:07:48,024 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:48,025 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:48,027 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:48,027 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:48,059 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:48,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:48,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:48,060 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-27 19:07:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:48,516 INFO L93 Difference]: Finished difference Result 491 states and 1119 transitions. [2019-12-27 19:07:48,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:07:48,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:48,517 INFO L225 Difference]: With dead ends: 491 [2019-12-27 19:07:48,518 INFO L226 Difference]: Without dead ends: 489 [2019-12-27 19:07:48,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=560, Invalid=1332, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:07:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2019-12-27 19:07:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 147. [2019-12-27 19:07:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:48,522 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:48,522 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:48,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:48,522 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:48,522 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:48,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:48,723 INFO L410 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1398046915, now seen corresponding path program 326 times [2019-12-27 19:07:48,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:48,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394891426] [2019-12-27 19:07:48,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:48,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394891426] [2019-12-27 19:07:48,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68765521] [2019-12-27 19:07:48,800 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:48,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:48,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:48,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:48,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:48,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:48,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:48,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575035502] [2019-12-27 19:07:48,899 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:48,900 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:48,901 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:48,901 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:48,902 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:48,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:48,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:48,902 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:49,288 INFO L93 Difference]: Finished difference Result 483 states and 1106 transitions. [2019-12-27 19:07:49,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:07:49,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:49,290 INFO L225 Difference]: With dead ends: 483 [2019-12-27 19:07:49,290 INFO L226 Difference]: Without dead ends: 481 [2019-12-27 19:07:49,290 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:07:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-12-27 19:07:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 146. [2019-12-27 19:07:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:49,294 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:49,295 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:49,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:49,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:49,295 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:49,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:49,497 INFO L410 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2997546, now seen corresponding path program 327 times [2019-12-27 19:07:49,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:49,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304792623] [2019-12-27 19:07:49,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:49,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304792623] [2019-12-27 19:07:49,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682521298] [2019-12-27 19:07:49,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:49,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:07:49,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:49,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:49,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:49,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:49,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:49,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [251643015] [2019-12-27 19:07:49,671 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:49,672 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:49,674 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:49,674 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:49,674 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:49,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:49,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:49,675 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:50,054 INFO L93 Difference]: Finished difference Result 494 states and 1132 transitions. [2019-12-27 19:07:50,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:07:50,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:50,055 INFO L225 Difference]: With dead ends: 494 [2019-12-27 19:07:50,055 INFO L226 Difference]: Without dead ends: 492 [2019-12-27 19:07:50,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:07:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-12-27 19:07:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 141. [2019-12-27 19:07:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 19:07:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 19:07:50,059 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 19 [2019-12-27 19:07:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:50,059 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 19:07:50,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 19:07:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:50,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:50,059 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:50,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:50,260 INFO L410 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash 138489104, now seen corresponding path program 328 times [2019-12-27 19:07:50,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:50,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426062052] [2019-12-27 19:07:50,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:50,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426062052] [2019-12-27 19:07:50,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438536796] [2019-12-27 19:07:50,338 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:50,398 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:50,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:50,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:07:50,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:50,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:50,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:07:50,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2068735933] [2019-12-27 19:07:50,444 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:50,445 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:50,446 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:50,447 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:50,514 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:07:50,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:07:50,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:50,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:07:50,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:07:50,515 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 18 states. [2019-12-27 19:07:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:51,148 INFO L93 Difference]: Finished difference Result 503 states and 1124 transitions. [2019-12-27 19:07:51,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:07:51,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 19:07:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:51,150 INFO L225 Difference]: With dead ends: 503 [2019-12-27 19:07:51,150 INFO L226 Difference]: Without dead ends: 501 [2019-12-27 19:07:51,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 19:07:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-12-27 19:07:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 147. [2019-12-27 19:07:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:51,154 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:51,155 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:51,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:07:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:51,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:51,155 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:51,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:51,356 INFO L410 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2022029507, now seen corresponding path program 329 times [2019-12-27 19:07:51,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:51,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015761436] [2019-12-27 19:07:51,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:51,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015761436] [2019-12-27 19:07:51,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253714435] [2019-12-27 19:07:51,442 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:51,501 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:07:51,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:51,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:07:51,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:51,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:51,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:07:51,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [152147777] [2019-12-27 19:07:51,511 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:51,512 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:51,515 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:51,515 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:51,586 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:51,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:51,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:51,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:51,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:51,586 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 19:07:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:52,010 INFO L93 Difference]: Finished difference Result 464 states and 1042 transitions. [2019-12-27 19:07:52,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:07:52,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:52,012 INFO L225 Difference]: With dead ends: 464 [2019-12-27 19:07:52,012 INFO L226 Difference]: Without dead ends: 462 [2019-12-27 19:07:52,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1149, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:07:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-12-27 19:07:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 148. [2019-12-27 19:07:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:52,016 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:52,017 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:52,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:52,017 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:52,017 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:52,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:52,218 INFO L410 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1063384918, now seen corresponding path program 330 times [2019-12-27 19:07:52,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:52,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062628932] [2019-12-27 19:07:52,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:52,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062628932] [2019-12-27 19:07:52,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587066425] [2019-12-27 19:07:52,305 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:52,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:07:52,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:52,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:07:52,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:07:52,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:52,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 19:07:52,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [517013450] [2019-12-27 19:07:52,400 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:52,400 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:52,402 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 19:07:52,402 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:52,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:52,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:52,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:07:52,403 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:52,727 INFO L93 Difference]: Finished difference Result 419 states and 943 transitions. [2019-12-27 19:07:52,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:07:52,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:52,729 INFO L225 Difference]: With dead ends: 419 [2019-12-27 19:07:52,729 INFO L226 Difference]: Without dead ends: 417 [2019-12-27 19:07:52,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:07:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-12-27 19:07:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 148. [2019-12-27 19:07:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:07:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 19:07:52,734 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 19:07:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:52,734 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 19:07:52,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 19:07:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:52,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:52,734 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:52,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:52,935 INFO L410 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1830537917, now seen corresponding path program 331 times [2019-12-27 19:07:52,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:52,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694729719] [2019-12-27 19:07:52,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:53,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694729719] [2019-12-27 19:07:53,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739373784] [2019-12-27 19:07:53,014 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:53,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:53,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:53,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:53,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:53,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [512148736] [2019-12-27 19:07:53,139 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:53,140 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:53,142 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:53,142 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:53,143 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:53,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:53,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:53,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:53,143 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 19:07:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:53,527 INFO L93 Difference]: Finished difference Result 472 states and 1061 transitions. [2019-12-27 19:07:53,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:53,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:53,529 INFO L225 Difference]: With dead ends: 472 [2019-12-27 19:07:53,529 INFO L226 Difference]: Without dead ends: 470 [2019-12-27 19:07:53,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:07:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-12-27 19:07:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 147. [2019-12-27 19:07:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:53,533 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:53,533 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:53,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:53,534 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:53,534 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:53,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:53,734 INFO L410 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:53,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1546090249, now seen corresponding path program 332 times [2019-12-27 19:07:53,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:53,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614960924] [2019-12-27 19:07:53,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:53,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614960924] [2019-12-27 19:07:53,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595769601] [2019-12-27 19:07:53,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:53,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:53,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:53,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:53,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:07:53,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:53,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:53,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [529597901] [2019-12-27 19:07:53,918 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:53,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:53,920 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:53,920 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:53,920 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:53,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:53,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:53,921 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:54,296 INFO L93 Difference]: Finished difference Result 482 states and 1088 transitions. [2019-12-27 19:07:54,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:54,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:54,298 INFO L225 Difference]: With dead ends: 482 [2019-12-27 19:07:54,298 INFO L226 Difference]: Without dead ends: 480 [2019-12-27 19:07:54,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:07:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-12-27 19:07:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 144. [2019-12-27 19:07:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:07:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-27 19:07:54,303 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 19 [2019-12-27 19:07:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:54,303 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-27 19:07:54,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-27 19:07:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:54,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:54,304 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:54,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:54,507 INFO L410 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash 193974416, now seen corresponding path program 333 times [2019-12-27 19:07:54,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:54,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560341227] [2019-12-27 19:07:54,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:54,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560341227] [2019-12-27 19:07:54,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795372788] [2019-12-27 19:07:54,601 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:54,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:07:54,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:54,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:54,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:54,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:54,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:54,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1628340186] [2019-12-27 19:07:54,699 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:54,700 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:54,702 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:54,702 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:54,731 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:54,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:54,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:07:54,732 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-27 19:07:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:55,215 INFO L93 Difference]: Finished difference Result 499 states and 1121 transitions. [2019-12-27 19:07:55,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:07:55,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:55,216 INFO L225 Difference]: With dead ends: 499 [2019-12-27 19:07:55,216 INFO L226 Difference]: Without dead ends: 497 [2019-12-27 19:07:55,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=586, Invalid=1394, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:07:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2019-12-27 19:07:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 147. [2019-12-27 19:07:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:55,220 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:55,220 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:55,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:55,221 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:55,221 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:55,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:55,422 INFO L410 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:55,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1152619005, now seen corresponding path program 334 times [2019-12-27 19:07:55,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:55,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767822485] [2019-12-27 19:07:55,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:55,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767822485] [2019-12-27 19:07:55,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2992726] [2019-12-27 19:07:55,503 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:55,563 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:07:55,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:55,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:55,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:07:55,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:55,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:55,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262323283] [2019-12-27 19:07:55,599 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:55,600 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:55,601 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:07:55,601 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:55,602 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:55,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:55,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:55,602 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:55,990 INFO L93 Difference]: Finished difference Result 491 states and 1106 transitions. [2019-12-27 19:07:55,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:55,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:55,992 INFO L225 Difference]: With dead ends: 491 [2019-12-27 19:07:55,992 INFO L226 Difference]: Without dead ends: 489 [2019-12-27 19:07:55,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:07:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2019-12-27 19:07:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 146. [2019-12-27 19:07:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:55,996 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:55,997 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:55,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:55,997 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:55,997 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:56,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:56,200 INFO L410 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash -248425456, now seen corresponding path program 335 times [2019-12-27 19:07:56,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:56,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489314628] [2019-12-27 19:07:56,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:56,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489314628] [2019-12-27 19:07:56,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783730924] [2019-12-27 19:07:56,278 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:56,338 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:07:56,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:56,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:07:56,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:07:56,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:56,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:07:56,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [233330928] [2019-12-27 19:07:56,382 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:56,382 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:56,384 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:56,385 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:56,385 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:56,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:56,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:07:56,385 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:56,767 INFO L93 Difference]: Finished difference Result 502 states and 1134 transitions. [2019-12-27 19:07:56,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:56,767 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:56,768 INFO L225 Difference]: With dead ends: 502 [2019-12-27 19:07:56,769 INFO L226 Difference]: Without dead ends: 500 [2019-12-27 19:07:56,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1189, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:07:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-27 19:07:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 143. [2019-12-27 19:07:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:07:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-27 19:07:56,774 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 19 [2019-12-27 19:07:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:56,774 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-27 19:07:56,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-27 19:07:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:56,774 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:56,774 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:56,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:56,975 INFO L410 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:56,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2045384630, now seen corresponding path program 336 times [2019-12-27 19:07:56,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:56,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377595442] [2019-12-27 19:07:56,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:57,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377595442] [2019-12-27 19:07:57,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121470897] [2019-12-27 19:07:57,046 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:57,110 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:07:57,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:57,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:07:57,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:07:57,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:57,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:07:57,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [936258842] [2019-12-27 19:07:57,156 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:57,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:57,159 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:57,159 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:57,186 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:07:57,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:07:57,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:57,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:07:57,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:07:57,187 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-27 19:07:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:57,705 INFO L93 Difference]: Finished difference Result 495 states and 1101 transitions. [2019-12-27 19:07:57,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:07:57,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 19:07:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:57,707 INFO L225 Difference]: With dead ends: 495 [2019-12-27 19:07:57,707 INFO L226 Difference]: Without dead ends: 493 [2019-12-27 19:07:57,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1558, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 19:07:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-12-27 19:07:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 147. [2019-12-27 19:07:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:07:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 19:07:57,711 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 19:07:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:57,711 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 19:07:57,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:07:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 19:07:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:57,712 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:57,712 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:57,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:57,913 INFO L410 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1086740041, now seen corresponding path program 337 times [2019-12-27 19:07:57,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:57,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340301624] [2019-12-27 19:07:57,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:57,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340301624] [2019-12-27 19:07:57,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358520879] [2019-12-27 19:07:57,988 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:58,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:58,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:07:58,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:58,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:58,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2879483] [2019-12-27 19:07:58,080 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:58,081 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:58,083 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 19:07:58,083 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:58,083 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:58,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:58,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:58,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:58,084 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 19:07:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:58,490 INFO L93 Difference]: Finished difference Result 473 states and 1052 transitions. [2019-12-27 19:07:58,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:07:58,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:58,491 INFO L225 Difference]: With dead ends: 473 [2019-12-27 19:07:58,491 INFO L226 Difference]: Without dead ends: 471 [2019-12-27 19:07:58,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:07:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-12-27 19:07:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 146. [2019-12-27 19:07:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:07:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 19:07:58,495 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 19:07:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:58,496 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 19:07:58,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 19:07:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:58,496 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:58,496 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:58,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:58,697 INFO L410 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1807182794, now seen corresponding path program 338 times [2019-12-27 19:07:58,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:58,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945300667] [2019-12-27 19:07:58,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:58,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945300667] [2019-12-27 19:07:58,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837773496] [2019-12-27 19:07:58,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:58,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:07:58,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:58,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:07:58,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:07:58,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:58,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 19:07:58,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169653004] [2019-12-27 19:07:58,899 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:58,900 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:58,901 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:07:58,902 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:58,902 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:58,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:58,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:07:58,902 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 19:07:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:07:59,323 INFO L93 Difference]: Finished difference Result 502 states and 1121 transitions. [2019-12-27 19:07:59,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:07:59,324 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:07:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:07:59,325 INFO L225 Difference]: With dead ends: 502 [2019-12-27 19:07:59,325 INFO L226 Difference]: Without dead ends: 500 [2019-12-27 19:07:59,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=1251, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:07:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-27 19:07:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 145. [2019-12-27 19:07:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:07:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 19:07:59,329 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 19:07:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:07:59,329 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 19:07:59,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:07:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 19:07:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:07:59,330 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:07:59,330 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:07:59,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:59,531 INFO L410 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:07:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:07:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1569445372, now seen corresponding path program 339 times [2019-12-27 19:07:59,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:07:59,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451245102] [2019-12-27 19:07:59,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:07:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:07:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:07:59,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451245102] [2019-12-27 19:07:59,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605348899] [2019-12-27 19:07:59,605 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:07:59,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:07:59,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:07:59,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:07:59,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:07:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 19:07:59,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:07:59,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 19:07:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [238678073] [2019-12-27 19:07:59,704 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:07:59,704 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:07:59,706 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 19:07:59,706 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:07:59,706 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:07:59,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:07:59,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:07:59,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:07:59,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:07:59,707 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 19:08:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:00,115 INFO L93 Difference]: Finished difference Result 506 states and 1113 transitions. [2019-12-27 19:08:00,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:08:00,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 19:08:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:00,117 INFO L225 Difference]: With dead ends: 506 [2019-12-27 19:08:00,118 INFO L226 Difference]: Without dead ends: 504 [2019-12-27 19:08:00,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=1175, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:08:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2019-12-27 19:08:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 133. [2019-12-27 19:08:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 19:08:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 318 transitions. [2019-12-27 19:08:00,127 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 318 transitions. Word has length 19 [2019-12-27 19:08:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:00,127 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 318 transitions. [2019-12-27 19:08:00,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:08:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 318 transitions. [2019-12-27 19:08:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:00,128 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:00,128 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:00,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:00,331 INFO L410 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1421733964, now seen corresponding path program 340 times [2019-12-27 19:08:00,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:00,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125428970] [2019-12-27 19:08:00,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:00,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125428970] [2019-12-27 19:08:00,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508690636] [2019-12-27 19:08:00,412 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:00,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:08:00,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:00,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:08:00,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:08:00,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:00,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 19:08:00,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1426080117] [2019-12-27 19:08:00,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:00,530 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:00,533 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 19:08:00,533 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:00,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:00,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:00,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:08:00,533 INFO L87 Difference]: Start difference. First operand 133 states and 318 transitions. Second operand 15 states. [2019-12-27 19:08:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:01,090 INFO L93 Difference]: Finished difference Result 601 states and 1239 transitions. [2019-12-27 19:08:01,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:08:01,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:01,092 INFO L225 Difference]: With dead ends: 601 [2019-12-27 19:08:01,092 INFO L226 Difference]: Without dead ends: 595 [2019-12-27 19:08:01,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=692, Invalid=1858, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 19:08:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-12-27 19:08:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 140. [2019-12-27 19:08:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 19:08:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 333 transitions. [2019-12-27 19:08:01,096 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 333 transitions. Word has length 20 [2019-12-27 19:08:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:01,097 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 333 transitions. [2019-12-27 19:08:01,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 333 transitions. [2019-12-27 19:08:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:01,097 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:01,097 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:01,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:01,298 INFO L410 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 203644980, now seen corresponding path program 341 times [2019-12-27 19:08:01,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:01,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428639010] [2019-12-27 19:08:01,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:01,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428639010] [2019-12-27 19:08:01,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265567394] [2019-12-27 19:08:01,388 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:01,431 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:08:01,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:01,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:01,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 19:08:01,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:01,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:01,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461007671] [2019-12-27 19:08:01,461 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:01,462 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:01,464 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 19:08:01,465 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:01,493 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:01,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:01,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:01,494 INFO L87 Difference]: Start difference. First operand 140 states and 333 transitions. Second operand 17 states. [2019-12-27 19:08:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:02,124 INFO L93 Difference]: Finished difference Result 542 states and 1159 transitions. [2019-12-27 19:08:02,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 19:08:02,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:02,126 INFO L225 Difference]: With dead ends: 542 [2019-12-27 19:08:02,126 INFO L226 Difference]: Without dead ends: 540 [2019-12-27 19:08:02,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=845, Invalid=1911, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 19:08:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-12-27 19:08:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 144. [2019-12-27 19:08:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 19:08:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 346 transitions. [2019-12-27 19:08:02,130 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 346 transitions. Word has length 20 [2019-12-27 19:08:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:02,130 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 346 transitions. [2019-12-27 19:08:02,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 346 transitions. [2019-12-27 19:08:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:02,131 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:02,131 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:02,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:02,331 INFO L410 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1162289569, now seen corresponding path program 342 times [2019-12-27 19:08:02,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:02,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861268107] [2019-12-27 19:08:02,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:02,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861268107] [2019-12-27 19:08:02,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414681664] [2019-12-27 19:08:02,421 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:02,492 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:08:02,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:02,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:02,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:08:02,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:02,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:02,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150342408] [2019-12-27 19:08:02,545 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:02,545 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:02,548 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 19:08:02,548 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:02,548 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:02,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:02,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:02,549 INFO L87 Difference]: Start difference. First operand 144 states and 346 transitions. Second operand 15 states. [2019-12-27 19:08:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:03,105 INFO L93 Difference]: Finished difference Result 526 states and 1130 transitions. [2019-12-27 19:08:03,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:08:03,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:03,106 INFO L225 Difference]: With dead ends: 526 [2019-12-27 19:08:03,107 INFO L226 Difference]: Without dead ends: 524 [2019-12-27 19:08:03,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:08:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2019-12-27 19:08:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 143. [2019-12-27 19:08:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:08:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 342 transitions. [2019-12-27 19:08:03,110 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 342 transitions. Word has length 20 [2019-12-27 19:08:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:03,110 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 342 transitions. [2019-12-27 19:08:03,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 342 transitions. [2019-12-27 19:08:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:03,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:03,111 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:03,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:03,312 INFO L410 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash -238754892, now seen corresponding path program 343 times [2019-12-27 19:08:03,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:03,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111152777] [2019-12-27 19:08:03,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:03,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111152777] [2019-12-27 19:08:03,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361837618] [2019-12-27 19:08:03,399 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:03,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:08:03,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:08:03,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:03,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 19:08:03,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528108744] [2019-12-27 19:08:03,569 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:03,570 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:03,573 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 42 transitions. [2019-12-27 19:08:03,573 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:03,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:03,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:03,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:03,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:03,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:08:03,574 INFO L87 Difference]: Start difference. First operand 143 states and 342 transitions. Second operand 15 states. [2019-12-27 19:08:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:04,149 INFO L93 Difference]: Finished difference Result 540 states and 1162 transitions. [2019-12-27 19:08:04,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:08:04,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:04,150 INFO L225 Difference]: With dead ends: 540 [2019-12-27 19:08:04,150 INFO L226 Difference]: Without dead ends: 538 [2019-12-27 19:08:04,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=692, Invalid=1858, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 19:08:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-12-27 19:08:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 138. [2019-12-27 19:08:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 19:08:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 326 transitions. [2019-12-27 19:08:04,154 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 326 transitions. Word has length 20 [2019-12-27 19:08:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:04,154 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 326 transitions. [2019-12-27 19:08:04,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 326 transitions. [2019-12-27 19:08:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:04,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:04,155 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:04,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:04,355 INFO L410 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1175285580, now seen corresponding path program 344 times [2019-12-27 19:08:04,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:04,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451756626] [2019-12-27 19:08:04,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:04,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451756626] [2019-12-27 19:08:04,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595056761] [2019-12-27 19:08:04,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:04,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:04,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:04,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:04,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:08:04,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:04,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:04,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621372989] [2019-12-27 19:08:04,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:04,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:04,531 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 19:08:04,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:04,591 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:08:04,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:08:04,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:04,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:08:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:04,592 INFO L87 Difference]: Start difference. First operand 138 states and 326 transitions. Second operand 19 states. [2019-12-27 19:08:05,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:05,374 INFO L93 Difference]: Finished difference Result 542 states and 1169 transitions. [2019-12-27 19:08:05,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-12-27 19:08:05,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-12-27 19:08:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:05,376 INFO L225 Difference]: With dead ends: 542 [2019-12-27 19:08:05,376 INFO L226 Difference]: Without dead ends: 540 [2019-12-27 19:08:05,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1034, Invalid=2272, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 19:08:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-12-27 19:08:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 146. [2019-12-27 19:08:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:08:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 351 transitions. [2019-12-27 19:08:05,381 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 351 transitions. Word has length 20 [2019-12-27 19:08:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:05,381 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 351 transitions. [2019-12-27 19:08:05,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:08:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 351 transitions. [2019-12-27 19:08:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:05,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:05,382 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:05,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:05,585 INFO L410 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 959163105, now seen corresponding path program 345 times [2019-12-27 19:08:05,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:05,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306375717] [2019-12-27 19:08:05,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:05,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306375717] [2019-12-27 19:08:05,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024885607] [2019-12-27 19:08:05,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:05,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:08:05,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:05,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:05,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:08:05,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:05,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:05,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [688955278] [2019-12-27 19:08:05,792 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:05,793 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:05,795 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:05,795 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:05,824 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:05,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:05,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:05,825 INFO L87 Difference]: Start difference. First operand 146 states and 351 transitions. Second operand 17 states. [2019-12-27 19:08:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:06,507 INFO L93 Difference]: Finished difference Result 505 states and 1095 transitions. [2019-12-27 19:08:06,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 19:08:06,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:06,509 INFO L225 Difference]: With dead ends: 505 [2019-12-27 19:08:06,509 INFO L226 Difference]: Without dead ends: 503 [2019-12-27 19:08:06,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 19:08:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2019-12-27 19:08:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 147. [2019-12-27 19:08:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:08:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 355 transitions. [2019-12-27 19:08:06,514 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 355 transitions. Word has length 20 [2019-12-27 19:08:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:06,514 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 355 transitions. [2019-12-27 19:08:06,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 355 transitions. [2019-12-27 19:08:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:06,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:06,514 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:06,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:06,715 INFO L410 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1917807694, now seen corresponding path program 346 times [2019-12-27 19:08:06,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:06,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287795159] [2019-12-27 19:08:06,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:06,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287795159] [2019-12-27 19:08:06,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723817469] [2019-12-27 19:08:06,806 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:06,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:08:06,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:06,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:08:06,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 19:08:06,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:06,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 19:08:06,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2054422102] [2019-12-27 19:08:06,903 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:06,904 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:06,906 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 19:08:06,906 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:06,906 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:06,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:06,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:08:06,906 INFO L87 Difference]: Start difference. First operand 147 states and 355 transitions. Second operand 15 states. [2019-12-27 19:08:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:07,452 INFO L93 Difference]: Finished difference Result 471 states and 1025 transitions. [2019-12-27 19:08:07,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:07,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:07,453 INFO L225 Difference]: With dead ends: 471 [2019-12-27 19:08:07,453 INFO L226 Difference]: Without dead ends: 469 [2019-12-27 19:08:07,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:08:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2019-12-27 19:08:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 147. [2019-12-27 19:08:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:08:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 355 transitions. [2019-12-27 19:08:07,458 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 355 transitions. Word has length 20 [2019-12-27 19:08:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:07,458 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 355 transitions. [2019-12-27 19:08:07,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 355 transitions. [2019-12-27 19:08:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:07,458 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:07,458 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:07,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:07,659 INFO L410 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash 516763233, now seen corresponding path program 347 times [2019-12-27 19:08:07,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:07,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598016651] [2019-12-27 19:08:07,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:07,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598016651] [2019-12-27 19:08:07,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383458410] [2019-12-27 19:08:07,747 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:07,797 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:08:07,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:07,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:07,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:08:07,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:07,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:07,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1926868295] [2019-12-27 19:08:07,849 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:07,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:07,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 19:08:07,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:07,853 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:07,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:07,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:07,853 INFO L87 Difference]: Start difference. First operand 147 states and 355 transitions. Second operand 15 states. [2019-12-27 19:08:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:08,431 INFO L93 Difference]: Finished difference Result 506 states and 1105 transitions. [2019-12-27 19:08:08,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:08:08,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:08,432 INFO L225 Difference]: With dead ends: 506 [2019-12-27 19:08:08,432 INFO L226 Difference]: Without dead ends: 504 [2019-12-27 19:08:08,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:08:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2019-12-27 19:08:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 146. [2019-12-27 19:08:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:08:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 351 transitions. [2019-12-27 19:08:08,436 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 351 transitions. Word has length 20 [2019-12-27 19:08:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:08,436 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 351 transitions. [2019-12-27 19:08:08,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 351 transitions. [2019-12-27 19:08:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:08,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:08,437 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:08,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:08,637 INFO L410 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:08,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1435102363, now seen corresponding path program 348 times [2019-12-27 19:08:08,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:08,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419637772] [2019-12-27 19:08:08,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:08,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419637772] [2019-12-27 19:08:08,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942364937] [2019-12-27 19:08:08,730 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:08,800 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:08:08,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:08,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:08,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:08:08,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:08,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:08,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1273008782] [2019-12-27 19:08:08,848 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:08,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:08,850 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:08,851 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:08,851 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:08,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:08,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:08,851 INFO L87 Difference]: Start difference. First operand 146 states and 351 transitions. Second operand 15 states. [2019-12-27 19:08:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:09,426 INFO L93 Difference]: Finished difference Result 508 states and 1106 transitions. [2019-12-27 19:08:09,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:08:09,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:09,427 INFO L225 Difference]: With dead ends: 508 [2019-12-27 19:08:09,427 INFO L226 Difference]: Without dead ends: 506 [2019-12-27 19:08:09,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:08:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-12-27 19:08:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 143. [2019-12-27 19:08:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:08:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 340 transitions. [2019-12-27 19:08:09,432 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 340 transitions. Word has length 20 [2019-12-27 19:08:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:09,432 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 340 transitions. [2019-12-27 19:08:09,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 340 transitions. [2019-12-27 19:08:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:09,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:09,432 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:09,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:09,633 INFO L410 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1119800268, now seen corresponding path program 349 times [2019-12-27 19:08:09,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:09,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139881473] [2019-12-27 19:08:09,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:09,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139881473] [2019-12-27 19:08:09,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369004821] [2019-12-27 19:08:09,728 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:09,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:09,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 19:08:09,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:09,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:09,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784706931] [2019-12-27 19:08:09,817 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:09,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:09,820 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:09,821 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:09,850 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:09,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:09,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:09,851 INFO L87 Difference]: Start difference. First operand 143 states and 340 transitions. Second operand 17 states. [2019-12-27 19:08:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:10,484 INFO L93 Difference]: Finished difference Result 520 states and 1123 transitions. [2019-12-27 19:08:10,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 19:08:10,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:10,485 INFO L225 Difference]: With dead ends: 520 [2019-12-27 19:08:10,485 INFO L226 Difference]: Without dead ends: 518 [2019-12-27 19:08:10,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=817, Invalid=1835, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 19:08:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2019-12-27 19:08:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 146. [2019-12-27 19:08:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 19:08:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 351 transitions. [2019-12-27 19:08:10,491 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 351 transitions. Word has length 20 [2019-12-27 19:08:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:10,491 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 351 transitions. [2019-12-27 19:08:10,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 351 transitions. [2019-12-27 19:08:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:10,491 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:10,491 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:10,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:10,692 INFO L410 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash -161155679, now seen corresponding path program 350 times [2019-12-27 19:08:10,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:10,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192912214] [2019-12-27 19:08:10,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:10,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192912214] [2019-12-27 19:08:10,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417754355] [2019-12-27 19:08:10,834 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:10,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:10,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:10,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:10,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:08:11,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:11,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:11,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [550529483] [2019-12-27 19:08:11,038 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:11,039 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:11,042 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 42 transitions. [2019-12-27 19:08:11,042 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:11,042 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:11,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:11,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:11,043 INFO L87 Difference]: Start difference. First operand 146 states and 351 transitions. Second operand 15 states. [2019-12-27 19:08:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:11,629 INFO L93 Difference]: Finished difference Result 514 states and 1114 transitions. [2019-12-27 19:08:11,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:08:11,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:11,630 INFO L225 Difference]: With dead ends: 514 [2019-12-27 19:08:11,630 INFO L226 Difference]: Without dead ends: 512 [2019-12-27 19:08:11,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:08:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2019-12-27 19:08:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 145. [2019-12-27 19:08:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:08:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 347 transitions. [2019-12-27 19:08:11,634 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 347 transitions. Word has length 20 [2019-12-27 19:08:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:11,634 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 347 transitions. [2019-12-27 19:08:11,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 347 transitions. [2019-12-27 19:08:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:11,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:11,635 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:11,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:11,836 INFO L410 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1562200140, now seen corresponding path program 351 times [2019-12-27 19:08:11,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:11,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287736469] [2019-12-27 19:08:11,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:11,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287736469] [2019-12-27 19:08:11,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539209149] [2019-12-27 19:08:11,920 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:11,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 19:08:11,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:11,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:08:11,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:08:12,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:12,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 19:08:12,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1309146510] [2019-12-27 19:08:12,057 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:12,058 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:12,061 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 19:08:12,061 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:12,061 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:12,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:12,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:12,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:08:12,062 INFO L87 Difference]: Start difference. First operand 145 states and 347 transitions. Second operand 15 states. [2019-12-27 19:08:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:12,601 INFO L93 Difference]: Finished difference Result 523 states and 1135 transitions. [2019-12-27 19:08:12,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:08:12,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:12,602 INFO L225 Difference]: With dead ends: 523 [2019-12-27 19:08:12,603 INFO L226 Difference]: Without dead ends: 521 [2019-12-27 19:08:12,603 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=668, Invalid=1782, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:08:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2019-12-27 19:08:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 136. [2019-12-27 19:08:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 19:08:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 319 transitions. [2019-12-27 19:08:12,607 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 319 transitions. Word has length 20 [2019-12-27 19:08:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:12,607 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 319 transitions. [2019-12-27 19:08:12,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 319 transitions. [2019-12-27 19:08:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:12,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:12,607 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:12,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:12,808 INFO L410 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash 817340724, now seen corresponding path program 352 times [2019-12-27 19:08:12,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:12,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60294284] [2019-12-27 19:08:12,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:12,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60294284] [2019-12-27 19:08:12,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427595487] [2019-12-27 19:08:12,895 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:12,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:08:12,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:12,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:08:12,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:08:13,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:13,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 19:08:13,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [590635230] [2019-12-27 19:08:13,016 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:13,017 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:13,019 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 19:08:13,019 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:13,121 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:08:13,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:08:13,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:08:13,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:08:13,122 INFO L87 Difference]: Start difference. First operand 136 states and 319 transitions. Second operand 21 states. [2019-12-27 19:08:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:14,171 INFO L93 Difference]: Finished difference Result 554 states and 1213 transitions. [2019-12-27 19:08:14,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-27 19:08:14,171 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-12-27 19:08:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:14,172 INFO L225 Difference]: With dead ends: 554 [2019-12-27 19:08:14,172 INFO L226 Difference]: Without dead ends: 552 [2019-12-27 19:08:14,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1261, Invalid=3295, Unknown=0, NotChecked=0, Total=4556 [2019-12-27 19:08:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2019-12-27 19:08:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 148. [2019-12-27 19:08:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:08:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 19:08:14,177 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 19:08:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:14,177 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 19:08:14,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:08:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 19:08:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:14,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:14,178 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:14,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:14,378 INFO L410 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash -971840479, now seen corresponding path program 353 times [2019-12-27 19:08:14,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:14,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928460532] [2019-12-27 19:08:14,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:14,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928460532] [2019-12-27 19:08:14,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622752712] [2019-12-27 19:08:14,465 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:14,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:08:14,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:14,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:14,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:08:14,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:14,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143854447] [2019-12-27 19:08:14,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:14,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:14,566 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:14,566 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:14,632 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:08:14,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:08:14,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:14,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:08:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:08:14,634 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 19 states. [2019-12-27 19:08:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:15,411 INFO L93 Difference]: Finished difference Result 508 states and 1120 transitions. [2019-12-27 19:08:15,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-27 19:08:15,411 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-12-27 19:08:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:15,412 INFO L225 Difference]: With dead ends: 508 [2019-12-27 19:08:15,412 INFO L226 Difference]: Without dead ends: 506 [2019-12-27 19:08:15,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=991, Invalid=2315, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 19:08:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-12-27 19:08:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 149. [2019-12-27 19:08:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:08:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 19:08:15,416 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 19:08:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:15,417 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 19:08:15,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:08:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 19:08:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:15,417 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:15,417 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:15,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:15,618 INFO L410 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1162608206, now seen corresponding path program 354 times [2019-12-27 19:08:15,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:15,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491110712] [2019-12-27 19:08:15,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:15,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491110712] [2019-12-27 19:08:15,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741036493] [2019-12-27 19:08:15,714 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:15,784 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-27 19:08:15,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:15,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:08:15,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:08:15,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:15,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2019-12-27 19:08:15,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [497034193] [2019-12-27 19:08:15,858 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:15,859 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:15,861 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:15,861 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:15,896 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:15,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:15,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:08:15,897 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 17 states. [2019-12-27 19:08:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:16,542 INFO L93 Difference]: Finished difference Result 458 states and 1021 transitions. [2019-12-27 19:08:16,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 19:08:16,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:16,544 INFO L225 Difference]: With dead ends: 458 [2019-12-27 19:08:16,544 INFO L226 Difference]: Without dead ends: 456 [2019-12-27 19:08:16,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=2074, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 19:08:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2019-12-27 19:08:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 151. [2019-12-27 19:08:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 19:08:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 368 transitions. [2019-12-27 19:08:16,547 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 368 transitions. Word has length 20 [2019-12-27 19:08:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:16,548 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 368 transitions. [2019-12-27 19:08:16,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 368 transitions. [2019-12-27 19:08:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:16,548 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:16,548 INFO L411 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:16,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:16,749 INFO L410 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2121252795, now seen corresponding path program 355 times [2019-12-27 19:08:16,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:16,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621760927] [2019-12-27 19:08:16,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:16,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621760927] [2019-12-27 19:08:16,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125641342] [2019-12-27 19:08:16,836 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:16,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:16,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-27 19:08:16,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:16,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:16,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1482246745] [2019-12-27 19:08:16,919 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:16,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:16,922 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 19:08:16,922 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:16,922 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:16,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:16,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:08:16,922 INFO L87 Difference]: Start difference. First operand 151 states and 368 transitions. Second operand 15 states. [2019-12-27 19:08:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:17,330 INFO L93 Difference]: Finished difference Result 403 states and 905 transitions. [2019-12-27 19:08:17,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:08:17,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:17,332 INFO L225 Difference]: With dead ends: 403 [2019-12-27 19:08:17,332 INFO L226 Difference]: Without dead ends: 401 [2019-12-27 19:08:17,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=452, Invalid=1030, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:08:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-12-27 19:08:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 151. [2019-12-27 19:08:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 19:08:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 368 transitions. [2019-12-27 19:08:17,336 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 368 transitions. Word has length 20 [2019-12-27 19:08:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:17,336 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 368 transitions. [2019-12-27 19:08:17,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 368 transitions. [2019-12-27 19:08:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:17,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:17,336 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:17,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:17,537 INFO L410 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 720208334, now seen corresponding path program 356 times [2019-12-27 19:08:17,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:17,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597119764] [2019-12-27 19:08:17,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:17,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597119764] [2019-12-27 19:08:17,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809856969] [2019-12-27 19:08:17,629 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:17,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:17,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:17,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:08:17,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:08:17,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:17,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 19:08:17,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1678215557] [2019-12-27 19:08:17,728 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:17,729 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:17,730 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 19:08:17,730 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:17,731 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:17,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:17,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:08:17,731 INFO L87 Difference]: Start difference. First operand 151 states and 368 transitions. Second operand 15 states. [2019-12-27 19:08:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:18,230 INFO L93 Difference]: Finished difference Result 457 states and 1032 transitions. [2019-12-27 19:08:18,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:18,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:18,231 INFO L225 Difference]: With dead ends: 457 [2019-12-27 19:08:18,231 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 19:08:18,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:08:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 19:08:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 150. [2019-12-27 19:08:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 19:08:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 364 transitions. [2019-12-27 19:08:18,235 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 364 transitions. Word has length 20 [2019-12-27 19:08:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:18,235 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 364 transitions. [2019-12-27 19:08:18,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 364 transitions. [2019-12-27 19:08:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:18,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:18,235 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:18,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:18,436 INFO L410 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1638547464, now seen corresponding path program 357 times [2019-12-27 19:08:18,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:18,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557763767] [2019-12-27 19:08:18,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:18,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557763767] [2019-12-27 19:08:18,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953706732] [2019-12-27 19:08:18,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:18,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:08:18,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:18,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:08:18,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:08:18,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:18,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 19:08:18,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1332357156] [2019-12-27 19:08:18,633 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:18,634 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:18,637 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:18,637 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:18,637 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:18,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:18,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:08:18,638 INFO L87 Difference]: Start difference. First operand 150 states and 364 transitions. Second operand 15 states. [2019-12-27 19:08:19,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:19,145 INFO L93 Difference]: Finished difference Result 464 states and 1045 transitions. [2019-12-27 19:08:19,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:19,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:19,146 INFO L225 Difference]: With dead ends: 464 [2019-12-27 19:08:19,146 INFO L226 Difference]: Without dead ends: 462 [2019-12-27 19:08:19,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:08:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-12-27 19:08:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 149. [2019-12-27 19:08:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:08:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 19:08:19,151 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 19:08:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:19,151 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 19:08:19,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 19:08:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:19,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:19,152 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:19,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:19,352 INFO L410 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash -916355167, now seen corresponding path program 358 times [2019-12-27 19:08:19,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:19,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160122129] [2019-12-27 19:08:19,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:19,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160122129] [2019-12-27 19:08:19,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540407263] [2019-12-27 19:08:19,488 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:19,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:08:19,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:19,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:19,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:08:19,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:19,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:19,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1073538843] [2019-12-27 19:08:19,610 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:19,611 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:19,613 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:19,613 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:19,640 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:19,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:19,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:19,642 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 17 states. [2019-12-27 19:08:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:20,250 INFO L93 Difference]: Finished difference Result 492 states and 1097 transitions. [2019-12-27 19:08:20,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 19:08:20,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:20,251 INFO L225 Difference]: With dead ends: 492 [2019-12-27 19:08:20,252 INFO L226 Difference]: Without dead ends: 490 [2019-12-27 19:08:20,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=758, Invalid=1894, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 19:08:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-12-27 19:08:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 151. [2019-12-27 19:08:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 19:08:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-27 19:08:20,256 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 20 [2019-12-27 19:08:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:20,256 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-27 19:08:20,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-27 19:08:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:20,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:20,257 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:20,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:20,458 INFO L410 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash 42289422, now seen corresponding path program 359 times [2019-12-27 19:08:20,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:20,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022696091] [2019-12-27 19:08:20,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:20,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022696091] [2019-12-27 19:08:20,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131547612] [2019-12-27 19:08:20,546 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:20,596 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:08:20,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:20,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:08:20,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:08:20,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:20,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2019-12-27 19:08:20,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [164729181] [2019-12-27 19:08:20,668 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:20,669 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:20,671 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 19:08:20,671 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:20,671 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:20,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:20,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:20,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:20,672 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 15 states. [2019-12-27 19:08:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:21,195 INFO L93 Difference]: Finished difference Result 474 states and 1064 transitions. [2019-12-27 19:08:21,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:21,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:21,196 INFO L225 Difference]: With dead ends: 474 [2019-12-27 19:08:21,196 INFO L226 Difference]: Without dead ends: 472 [2019-12-27 19:08:21,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=615, Invalid=1737, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:08:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-12-27 19:08:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 151. [2019-12-27 19:08:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 19:08:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-27 19:08:21,200 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 20 [2019-12-27 19:08:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:21,200 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-27 19:08:21,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-27 19:08:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:21,201 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:21,201 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:21,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:21,401 INFO L410 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1358755039, now seen corresponding path program 360 times [2019-12-27 19:08:21,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:21,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18070238] [2019-12-27 19:08:21,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:21,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18070238] [2019-12-27 19:08:21,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801602419] [2019-12-27 19:08:21,485 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:21,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:08:21,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:21,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:21,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:08:21,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:21,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:21,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [699615028] [2019-12-27 19:08:21,604 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:21,604 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:21,606 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 19:08:21,606 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:21,606 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:21,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:21,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:21,607 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 15 states. [2019-12-27 19:08:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:22,116 INFO L93 Difference]: Finished difference Result 500 states and 1118 transitions. [2019-12-27 19:08:22,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:22,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:22,117 INFO L225 Difference]: With dead ends: 500 [2019-12-27 19:08:22,117 INFO L226 Difference]: Without dead ends: 498 [2019-12-27 19:08:22,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=607, Invalid=1555, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 19:08:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2019-12-27 19:08:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 148. [2019-12-27 19:08:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:08:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 19:08:22,122 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 19:08:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:22,122 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 19:08:22,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 19:08:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:22,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:22,122 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:22,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:22,323 INFO L410 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1139253083, now seen corresponding path program 361 times [2019-12-27 19:08:22,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:22,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461687615] [2019-12-27 19:08:22,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:22,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461687615] [2019-12-27 19:08:22,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814236856] [2019-12-27 19:08:22,410 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:22,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:22,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:08:22,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:22,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:22,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1647583097] [2019-12-27 19:08:22,518 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:22,519 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:22,521 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:22,521 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:22,551 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:22,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:22,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:22,552 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 17 states. [2019-12-27 19:08:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:23,168 INFO L93 Difference]: Finished difference Result 485 states and 1079 transitions. [2019-12-27 19:08:23,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 19:08:23,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:23,170 INFO L225 Difference]: With dead ends: 485 [2019-12-27 19:08:23,170 INFO L226 Difference]: Without dead ends: 483 [2019-12-27 19:08:23,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=802, Invalid=1954, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 19:08:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2019-12-27 19:08:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 149. [2019-12-27 19:08:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:08:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 19:08:23,175 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 19:08:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:23,175 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 19:08:23,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 19:08:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:23,175 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:23,175 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:23,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:23,376 INFO L410 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2097897672, now seen corresponding path program 362 times [2019-12-27 19:08:23,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:23,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316213144] [2019-12-27 19:08:23,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:23,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316213144] [2019-12-27 19:08:23,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285152896] [2019-12-27 19:08:23,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:23,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:23,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:23,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:08:23,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 19:08:23,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:23,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 19:08:23,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1643192267] [2019-12-27 19:08:23,558 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:23,559 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:23,561 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:23,561 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:23,561 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:23,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:23,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:23,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:23,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:08:23,562 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 19:08:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:24,073 INFO L93 Difference]: Finished difference Result 462 states and 1034 transitions. [2019-12-27 19:08:24,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:24,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:24,074 INFO L225 Difference]: With dead ends: 462 [2019-12-27 19:08:24,074 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 19:08:24,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:08:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 19:08:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 149. [2019-12-27 19:08:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:08:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 19:08:24,078 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 19:08:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:24,078 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 19:08:24,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 19:08:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:24,078 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:24,078 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:24,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:24,279 INFO L410 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash 696853211, now seen corresponding path program 363 times [2019-12-27 19:08:24,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:24,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136539685] [2019-12-27 19:08:24,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:24,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136539685] [2019-12-27 19:08:24,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023754074] [2019-12-27 19:08:24,373 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:24,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:08:24,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:24,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:24,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:08:24,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:24,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:24,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1814075169] [2019-12-27 19:08:24,488 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:24,488 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:24,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 19:08:24,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:24,490 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:24,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:24,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:24,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:24,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:24,491 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 19:08:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:25,005 INFO L93 Difference]: Finished difference Result 483 states and 1081 transitions. [2019-12-27 19:08:25,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:08:25,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:25,007 INFO L225 Difference]: With dead ends: 483 [2019-12-27 19:08:25,007 INFO L226 Difference]: Without dead ends: 481 [2019-12-27 19:08:25,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:08:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-12-27 19:08:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 148. [2019-12-27 19:08:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:08:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 19:08:25,011 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 19:08:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:25,011 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 19:08:25,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 19:08:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:25,012 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:25,012 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:25,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:25,212 INFO L410 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1615192341, now seen corresponding path program 364 times [2019-12-27 19:08:25,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:25,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045018345] [2019-12-27 19:08:25,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:25,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045018345] [2019-12-27 19:08:25,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92260333] [2019-12-27 19:08:25,298 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:25,355 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:08:25,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:25,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:25,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:08:25,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:25,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:25,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [10943884] [2019-12-27 19:08:25,401 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:25,402 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:25,404 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:25,404 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:25,404 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:25,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:25,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:25,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:25,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:25,405 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 15 states. [2019-12-27 19:08:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:25,908 INFO L93 Difference]: Finished difference Result 492 states and 1095 transitions. [2019-12-27 19:08:25,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:08:25,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:25,910 INFO L225 Difference]: With dead ends: 492 [2019-12-27 19:08:25,910 INFO L226 Difference]: Without dead ends: 490 [2019-12-27 19:08:25,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:08:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-12-27 19:08:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 143. [2019-12-27 19:08:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 19:08:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 338 transitions. [2019-12-27 19:08:25,913 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 338 transitions. Word has length 20 [2019-12-27 19:08:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:25,913 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 338 transitions. [2019-12-27 19:08:25,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 338 transitions. [2019-12-27 19:08:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:25,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:25,914 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:26,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:26,115 INFO L410 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:26,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:26,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1695849292, now seen corresponding path program 365 times [2019-12-27 19:08:26,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:26,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321316409] [2019-12-27 19:08:26,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:26,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321316409] [2019-12-27 19:08:26,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145521342] [2019-12-27 19:08:26,197 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:26,240 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:26,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:26,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:26,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 19:08:26,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:26,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:26,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832077678] [2019-12-27 19:08:26,271 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:26,272 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:26,274 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:26,274 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:26,331 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:08:26,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:08:26,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:26,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:08:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:26,333 INFO L87 Difference]: Start difference. First operand 143 states and 338 transitions. Second operand 19 states. [2019-12-27 19:08:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:27,122 INFO L93 Difference]: Finished difference Result 503 states and 1100 transitions. [2019-12-27 19:08:27,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-27 19:08:27,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-12-27 19:08:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:27,124 INFO L225 Difference]: With dead ends: 503 [2019-12-27 19:08:27,124 INFO L226 Difference]: Without dead ends: 501 [2019-12-27 19:08:27,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2193, Unknown=0, NotChecked=0, Total=3192 [2019-12-27 19:08:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-12-27 19:08:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 148. [2019-12-27 19:08:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:08:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 19:08:27,128 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 19:08:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:27,128 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 19:08:27,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:08:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 19:08:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:27,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:27,129 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:27,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:27,330 INFO L410 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:27,330 INFO L82 PathProgramCache]: Analyzing trace with hash 438599393, now seen corresponding path program 366 times [2019-12-27 19:08:27,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:27,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682920318] [2019-12-27 19:08:27,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:27,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682920318] [2019-12-27 19:08:27,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788949794] [2019-12-27 19:08:27,411 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:27,491 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 19:08:27,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:27,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:27,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:08:27,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:27,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:27,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [566250937] [2019-12-27 19:08:27,539 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:27,540 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:27,542 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:27,542 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:27,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:27,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:27,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:08:27,574 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 17 states. [2019-12-27 19:08:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:28,217 INFO L93 Difference]: Finished difference Result 483 states and 1069 transitions. [2019-12-27 19:08:28,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 19:08:28,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:28,218 INFO L225 Difference]: With dead ends: 483 [2019-12-27 19:08:28,218 INFO L226 Difference]: Without dead ends: 481 [2019-12-27 19:08:28,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=2032, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 19:08:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-12-27 19:08:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 149. [2019-12-27 19:08:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:08:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 19:08:28,223 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 19:08:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:28,223 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 19:08:28,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 19:08:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:28,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:28,224 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:28,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:28,424 INFO L410 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1397243982, now seen corresponding path program 367 times [2019-12-27 19:08:28,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:28,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343449541] [2019-12-27 19:08:28,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:28,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343449541] [2019-12-27 19:08:28,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546825781] [2019-12-27 19:08:28,515 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:28,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:08:28,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 19:08:28,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:28,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 19:08:28,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1644351130] [2019-12-27 19:08:28,613 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:28,614 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:28,616 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 42 transitions. [2019-12-27 19:08:28,616 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:28,616 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:28,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:28,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:28,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:28,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:08:28,617 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 19:08:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:29,132 INFO L93 Difference]: Finished difference Result 456 states and 1015 transitions. [2019-12-27 19:08:29,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:08:29,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:29,133 INFO L225 Difference]: With dead ends: 456 [2019-12-27 19:08:29,133 INFO L226 Difference]: Without dead ends: 454 [2019-12-27 19:08:29,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:08:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-12-27 19:08:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 149. [2019-12-27 19:08:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 19:08:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 19:08:29,137 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 19:08:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:29,138 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 19:08:29,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 19:08:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:29,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:29,138 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:29,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:29,339 INFO L410 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash -3800479, now seen corresponding path program 368 times [2019-12-27 19:08:29,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:29,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854306144] [2019-12-27 19:08:29,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:29,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854306144] [2019-12-27 19:08:29,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418324724] [2019-12-27 19:08:29,433 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:29,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:29,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:29,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:29,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 19:08:29,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:29,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:29,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2025792074] [2019-12-27 19:08:29,541 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:29,542 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:29,544 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 19:08:29,544 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:29,544 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:29,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:29,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:29,545 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 19:08:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:30,100 INFO L93 Difference]: Finished difference Result 480 states and 1070 transitions. [2019-12-27 19:08:30,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:08:30,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:30,101 INFO L225 Difference]: With dead ends: 480 [2019-12-27 19:08:30,101 INFO L226 Difference]: Without dead ends: 478 [2019-12-27 19:08:30,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:08:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2019-12-27 19:08:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 148. [2019-12-27 19:08:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:08:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 19:08:30,107 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 19:08:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:30,107 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 19:08:30,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 19:08:30,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:30,107 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:30,108 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:30,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:30,308 INFO L410 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash 914538651, now seen corresponding path program 369 times [2019-12-27 19:08:30,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:30,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513553159] [2019-12-27 19:08:30,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:30,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513553159] [2019-12-27 19:08:30,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738132476] [2019-12-27 19:08:30,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:30,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:08:30,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:30,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:30,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:08:30,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:30,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:30,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1817890132] [2019-12-27 19:08:30,514 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:30,515 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:30,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:30,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:30,517 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:30,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:30,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:30,518 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 15 states. [2019-12-27 19:08:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:31,085 INFO L93 Difference]: Finished difference Result 478 states and 1062 transitions. [2019-12-27 19:08:31,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:08:31,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:31,087 INFO L225 Difference]: With dead ends: 478 [2019-12-27 19:08:31,087 INFO L226 Difference]: Without dead ends: 476 [2019-12-27 19:08:31,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:08:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2019-12-27 19:08:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 145. [2019-12-27 19:08:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 19:08:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 345 transitions. [2019-12-27 19:08:31,092 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 345 transitions. Word has length 20 [2019-12-27 19:08:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:31,092 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 345 transitions. [2019-12-27 19:08:31,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 345 transitions. [2019-12-27 19:08:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:31,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:31,093 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:31,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:31,296 INFO L410 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1640363980, now seen corresponding path program 370 times [2019-12-27 19:08:31,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:31,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483905805] [2019-12-27 19:08:31,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:31,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483905805] [2019-12-27 19:08:31,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967831018] [2019-12-27 19:08:31,382 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:31,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:08:31,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:31,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:08:31,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:08:31,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:31,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 19:08:31,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [925414879] [2019-12-27 19:08:31,501 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:31,502 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:31,505 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 19:08:31,505 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:31,536 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:08:31,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:08:31,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:08:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:08:31,537 INFO L87 Difference]: Start difference. First operand 145 states and 345 transitions. Second operand 17 states. [2019-12-27 19:08:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:32,191 INFO L93 Difference]: Finished difference Result 502 states and 1102 transitions. [2019-12-27 19:08:32,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 19:08:32,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 19:08:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:32,193 INFO L225 Difference]: With dead ends: 502 [2019-12-27 19:08:32,193 INFO L226 Difference]: Without dead ends: 500 [2019-12-27 19:08:32,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=797, Invalid=2065, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 19:08:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-27 19:08:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 148. [2019-12-27 19:08:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 19:08:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 19:08:32,198 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 19:08:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:32,198 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 19:08:32,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:08:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 19:08:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:32,198 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:32,198 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:32,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:32,399 INFO L410 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash -681719391, now seen corresponding path program 371 times [2019-12-27 19:08:32,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:32,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340731369] [2019-12-27 19:08:32,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:32,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340731369] [2019-12-27 19:08:32,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743610769] [2019-12-27 19:08:32,490 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:32,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:08:32,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:32,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:32,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 19:08:32,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:32,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:32,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [521594936] [2019-12-27 19:08:32,585 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:32,586 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:32,588 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 19:08:32,588 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:32,588 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:32,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:32,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:08:32,589 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 15 states. [2019-12-27 19:08:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:33,172 INFO L93 Difference]: Finished difference Result 492 states and 1086 transitions. [2019-12-27 19:08:33,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:08:33,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:33,173 INFO L225 Difference]: With dead ends: 492 [2019-12-27 19:08:33,173 INFO L226 Difference]: Without dead ends: 490 [2019-12-27 19:08:33,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:08:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-12-27 19:08:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 147. [2019-12-27 19:08:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 19:08:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 352 transitions. [2019-12-27 19:08:33,177 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 352 transitions. Word has length 20 [2019-12-27 19:08:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:33,177 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 352 transitions. [2019-12-27 19:08:33,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 352 transitions. [2019-12-27 19:08:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:33,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:33,178 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:33,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:33,379 INFO L410 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2082763852, now seen corresponding path program 372 times [2019-12-27 19:08:33,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:33,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232915613] [2019-12-27 19:08:33,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:33,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232915613] [2019-12-27 19:08:33,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472282965] [2019-12-27 19:08:33,464 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:33,541 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:08:33,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:33,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:33,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 19:08:33,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:33,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:33,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1954395328] [2019-12-27 19:08:33,570 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:33,571 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:33,572 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 19:08:33,573 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:33,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:08:33,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:08:33,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:08:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:08:33,573 INFO L87 Difference]: Start difference. First operand 147 states and 352 transitions. Second operand 15 states. [2019-12-27 19:08:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:34,082 INFO L93 Difference]: Finished difference Result 503 states and 1109 transitions. [2019-12-27 19:08:34,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:08:34,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 19:08:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:34,083 INFO L225 Difference]: With dead ends: 503 [2019-12-27 19:08:34,083 INFO L226 Difference]: Without dead ends: 501 [2019-12-27 19:08:34,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=625, Invalid=1445, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:08:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-12-27 19:08:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 134. [2019-12-27 19:08:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 19:08:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 312 transitions. [2019-12-27 19:08:34,088 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 312 transitions. Word has length 20 [2019-12-27 19:08:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:34,088 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 312 transitions. [2019-12-27 19:08:34,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:08:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 312 transitions. [2019-12-27 19:08:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:34,088 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:34,088 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:34,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:34,289 INFO L410 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash 175804852, now seen corresponding path program 373 times [2019-12-27 19:08:34,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:34,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449518688] [2019-12-27 19:08:34,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:34,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449518688] [2019-12-27 19:08:34,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742939274] [2019-12-27 19:08:34,377 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:34,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:08:34,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 19:08:34,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:34,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 19:08:34,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509184521] [2019-12-27 19:08:34,464 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:34,465 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:34,467 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 19:08:34,467 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:34,607 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 19:08:34,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:08:34,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:08:34,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:08:34,608 INFO L87 Difference]: Start difference. First operand 134 states and 312 transitions. Second operand 23 states. [2019-12-27 19:08:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:08:35,896 INFO L93 Difference]: Finished difference Result 570 states and 1255 transitions. [2019-12-27 19:08:35,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-12-27 19:08:35,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-12-27 19:08:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:08:35,898 INFO L225 Difference]: With dead ends: 570 [2019-12-27 19:08:35,898 INFO L226 Difference]: Without dead ends: 568 [2019-12-27 19:08:35,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=3806, Unknown=0, NotChecked=0, Total=5402 [2019-12-27 19:08:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-12-27 19:08:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 150. [2019-12-27 19:08:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 19:08:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 361 transitions. [2019-12-27 19:08:35,903 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 361 transitions. Word has length 20 [2019-12-27 19:08:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:08:35,903 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 361 transitions. [2019-12-27 19:08:35,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:08:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 361 transitions. [2019-12-27 19:08:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:08:35,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:08:35,903 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:08:36,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:36,104 INFO L410 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:08:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:08:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1240412831, now seen corresponding path program 374 times [2019-12-27 19:08:36,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:08:36,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094810750] [2019-12-27 19:08:36,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:08:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:08:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:08:36,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094810750] [2019-12-27 19:08:36,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815058912] [2019-12-27 19:08:36,187 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:36,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:08:36,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:08:36,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:08:36,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:08:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 19:08:36,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:08:36,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 19:08:36,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035772438] [2019-12-27 19:08:36,296 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:08:36,297 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:08:36,299 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 19:08:36,299 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:08:36,408 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:08:36,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:08:36,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:08:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:08:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:08:36,409 INFO L87 Difference]: Start difference. First operand 150 states and 361 transitions. Second operand 21 states. Received shutdown request... [2019-12-27 19:08:36,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:08:36,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:08:36,827 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 19:08:36,832 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 19:08:36,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 07:08:36 BasicIcfg [2019-12-27 19:08:36,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 19:08:36,834 INFO L168 Benchmark]: Toolchain (without parser) took 302943.99 ms. Allocated memory was 142.1 MB in the beginning and 285.7 MB in the end (delta: 143.7 MB). Free memory was 100.9 MB in the beginning and 205.0 MB in the end (delta: -104.1 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,834 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 142.1 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1109.56 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 100.7 MB in the beginning and 110.8 MB in the end (delta: -10.1 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.03 ms. Allocated memory is still 205.5 MB. Free memory was 110.8 MB in the beginning and 107.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,836 INFO L168 Benchmark]: Boogie Preprocessor took 45.40 ms. Allocated memory is still 205.5 MB. Free memory was 107.9 MB in the beginning and 106.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,836 INFO L168 Benchmark]: RCFGBuilder took 551.00 ms. Allocated memory was 205.5 MB in the beginning and 237.0 MB in the end (delta: 31.5 MB). Free memory was 106.6 MB in the beginning and 195.6 MB in the end (delta: -89.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,836 INFO L168 Benchmark]: TraceAbstraction took 301135.97 ms. Allocated memory was 237.0 MB in the beginning and 285.7 MB in the end (delta: 48.8 MB). Free memory was 195.6 MB in the beginning and 205.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2019-12-27 19:08:36,838 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 142.1 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1109.56 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 100.7 MB in the beginning and 110.8 MB in the end (delta: -10.1 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 97.03 ms. Allocated memory is still 205.5 MB. Free memory was 110.8 MB in the beginning and 107.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.40 ms. Allocated memory is still 205.5 MB. Free memory was 107.9 MB in the beginning and 106.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 551.00 ms. Allocated memory was 205.5 MB in the beginning and 237.0 MB in the end (delta: 31.5 MB). Free memory was 106.6 MB in the beginning and 195.6 MB in the end (delta: -89.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 301135.97 ms. Allocated memory was 237.0 MB in the beginning and 285.7 MB in the end (delta: 48.8 MB). Free memory was 195.6 MB in the beginning and 205.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 5.3s, 82 ProgramPointsBefore, 14 ProgramPointsAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 328 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 510 CheckedPairsTotal, 77 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (150states) and FLOYD_HOARE automaton (currently 20 states, 21 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 38 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Result: TIMEOUT, OverallTime: 301.0s, OverallIterations: 376, TraceHistogramMax: 9, AutomataDifference: 140.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5107 SDtfs, 44125 SDslu, 28796 SDs, 0 SdLazy, 29390 SolverSat, 31445 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18406 GetRequests, 5402 SyntacticMatches, 0 SemanticMatches, 13003 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104478 ImplicationChecksByTransitivity, 131.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 375 MinimizatonAttempts, 89592 StatesRemovedByMinimization, 374 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.9s SsaConstructionTime, 9.5s SatisfiabilityAnalysisTime, 41.4s InterpolantComputationTime, 13409 NumberOfCodeBlocks, 13078 NumberOfCodeBlocksAsserted, 1429 NumberOfCheckSat, 12659 ConstructedInterpolants, 0 QuantifiedInterpolants, 572935 SizeOfPredicates, 399 NumberOfNonLiveVariables, 51497 ConjunctsInSsa, 1895 ConjunctsInUnsatCore, 750 InterpolantComputations, 2 PerfectInterpolantSequences, 3236/16863 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown