/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:31:03,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:31:03,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:31:03,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:31:03,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:31:03,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:31:03,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:31:03,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:31:03,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:31:03,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:31:03,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:31:03,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:31:03,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:31:03,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:31:03,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:31:03,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:31:03,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:31:03,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:31:03,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:31:03,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:31:03,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:31:03,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:31:03,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:31:03,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:31:03,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:31:03,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:31:03,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:31:03,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:31:03,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:31:03,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:31:03,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:31:03,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:31:03,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:31:03,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:31:03,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:31:03,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:31:03,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:31:03,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:31:03,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:31:03,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:31:03,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:31:03,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-04-17 18:31:03,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:31:03,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:31:03,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:31:03,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:31:03,756 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:31:03,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:31:03,757 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:31:03,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:31:03,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:31:03,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:31:03,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:31:03,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:31:03,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:31:03,758 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:31:03,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:31:03,759 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:31:03,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:31:03,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:31:03,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:31:03,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:31:03,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:31:03,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:31:03,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:31:03,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:31:03,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:31:03,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:31:03,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:31:03,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:31:03,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 18:31:03,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:31:04,049 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:31:04,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:31:04,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:31:04,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:31:04,068 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:31:04,069 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-04-17 18:31:04,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121ef88f5/d3ad2e7b484e4bd1bd6c2cfabb957d1c/FLAGd7ec913e9 [2020-04-17 18:31:04,729 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:31:04,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-04-17 18:31:04,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121ef88f5/d3ad2e7b484e4bd1bd6c2cfabb957d1c/FLAGd7ec913e9 [2020-04-17 18:31:04,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121ef88f5/d3ad2e7b484e4bd1bd6c2cfabb957d1c [2020-04-17 18:31:04,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:31:05,011 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:31:05,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:31:05,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:31:05,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:31:05,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:05,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a67c07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:05, skipping insertion in model container [2020-04-17 18:31:05,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:05,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:31:05,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:31:05,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:31:05,745 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:31:05,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:31:06,046 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:31:06,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06 WrapperNode [2020-04-17 18:31:06,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:31:06,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:31:06,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:31:06,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:31:06,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:31:06,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:31:06,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:31:06,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:31:06,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... [2020-04-17 18:31:06,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:31:06,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:31:06,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:31:06,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:31:06,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:31:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:31:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:31:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-17 18:31:06,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-04-17 18:31:06,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-04-17 18:31:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:31:06,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:31:06,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:31:06,224 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:31:06,709 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:31:06,709 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-04-17 18:31:06,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:31:06 BoogieIcfgContainer [2020-04-17 18:31:06,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:31:06,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:31:06,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:31:06,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:31:06,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:31:04" (1/3) ... [2020-04-17 18:31:06,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d7256c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:31:06, skipping insertion in model container [2020-04-17 18:31:06,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:06" (2/3) ... [2020-04-17 18:31:06,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d7256c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:31:06, skipping insertion in model container [2020-04-17 18:31:06,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:31:06" (3/3) ... [2020-04-17 18:31:06,722 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-04-17 18:31:06,732 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:31:06,732 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:31:06,739 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:31:06,739 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:31:06,763 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,763 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,763 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,763 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,764 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,764 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,764 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,765 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,765 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,765 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,765 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,765 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,766 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,766 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,766 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,766 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,767 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,767 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,767 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,767 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,768 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,771 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,772 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,772 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,772 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,773 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,773 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,773 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,773 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:06,795 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:31:06,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:31:06,816 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:31:06,816 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:31:06,816 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:31:06,816 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:31:06,817 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:31:06,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:31:06,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:31:06,833 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-04-17 18:31:06,835 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-04-17 18:31:06,882 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-04-17 18:31:06,883 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 18:31:06,888 INFO L80 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 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-04-17 18:31:06,890 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-04-17 18:31:06,925 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-04-17 18:31:06,925 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 18:31:06,926 INFO L80 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 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-04-17 18:31:06,929 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-04-17 18:31:06,931 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:31:08,409 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 18:31:08,658 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-04-17 18:31:09,250 WARN L192 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-04-17 18:31:09,476 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-04-17 18:31:09,934 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-04-17 18:31:10,247 WARN L192 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-04-17 18:31:11,550 WARN L192 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-04-17 18:31:12,001 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-04-17 18:31:12,004 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-04-17 18:31:12,005 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-04-17 18:31:12,009 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-04-17 18:31:12,019 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-04-17 18:31:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-17 18:31:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:31:12,028 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:12,029 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:12,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-04-17 18:31:12,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:12,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715845336] [2020-04-17 18:31:12,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:12,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715845336] [2020-04-17 18:31:12,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:31:12,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:31:12,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428617906] [2020-04-17 18:31:12,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:31:12,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:31:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:31:12,300 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-04-17 18:31:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:12,341 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-04-17 18:31:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:31:12,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-04-17 18:31:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:12,356 INFO L225 Difference]: With dead ends: 20 [2020-04-17 18:31:12,356 INFO L226 Difference]: Without dead ends: 20 [2020-04-17 18:31:12,358 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:31:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-04-17 18:31:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-04-17 18:31:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-04-17 18:31:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-04-17 18:31:12,397 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-04-17 18:31:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:12,398 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-04-17 18:31:12,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:31:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-04-17 18:31:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:31:12,399 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:12,399 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:12,399 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-04-17 18:31:12,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:12,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798432312] [2020-04-17 18:31:12,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:12,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798432312] [2020-04-17 18:31:12,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242969257] [2020-04-17 18:31:12,534 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 [2020-04-17 18:31:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:12,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-04-17 18:31:12,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:31:12,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:31:12,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-04-17 18:31:12,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490412211] [2020-04-17 18:31:12,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:31:12,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:31:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:31:12,670 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-04-17 18:31:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:12,689 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-04-17 18:31:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:31:12,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-04-17 18:31:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:12,691 INFO L225 Difference]: With dead ends: 28 [2020-04-17 18:31:12,692 INFO L226 Difference]: Without dead ends: 28 [2020-04-17 18:31:12,693 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:31:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-04-17 18:31:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-04-17 18:31:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-04-17 18:31:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-04-17 18:31:12,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-04-17 18:31:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:12,699 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-04-17 18:31:12,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:31:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-04-17 18:31:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:31:12,700 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:12,700 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:12,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:12,906 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-04-17 18:31:12,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:12,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070068084] [2020-04-17 18:31:12,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:13,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070068084] [2020-04-17 18:31:13,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692279208] [2020-04-17 18:31:13,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 [2020-04-17 18:31:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:13,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-17 18:31:13,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:31:13,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:13,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-04-17 18:31:13,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555896898] [2020-04-17 18:31:13,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:31:13,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:31:13,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:31:13,155 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-04-17 18:31:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:13,270 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-04-17 18:31:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:31:13,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-04-17 18:31:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:13,272 INFO L225 Difference]: With dead ends: 44 [2020-04-17 18:31:13,273 INFO L226 Difference]: Without dead ends: 44 [2020-04-17 18:31:13,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:31:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-04-17 18:31:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-04-17 18:31:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-04-17 18:31:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-04-17 18:31:13,280 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-04-17 18:31:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:13,280 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-04-17 18:31:13,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:31:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-04-17 18:31:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:31:13,281 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:13,281 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:13,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:13,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-04-17 18:31:13,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:13,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612581252] [2020-04-17 18:31:13,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:13,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612581252] [2020-04-17 18:31:13,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994887613] [2020-04-17 18:31:13,678 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 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 [2020-04-17 18:31:13,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:31:13,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:13,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:31:13,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-04-17 18:31:13,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:13,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2020-04-17 18:31:13,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531535343] [2020-04-17 18:31:13,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:31:13,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:31:13,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:31:13,814 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 16 states. [2020-04-17 18:31:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:14,764 INFO L93 Difference]: Finished difference Result 135 states and 260 transitions. [2020-04-17 18:31:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-17 18:31:14,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-04-17 18:31:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:14,766 INFO L225 Difference]: With dead ends: 135 [2020-04-17 18:31:14,767 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 18:31:14,768 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=624, Invalid=2028, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 18:31:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 18:31:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2020-04-17 18:31:14,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 18:31:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-04-17 18:31:14,779 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-04-17 18:31:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:14,779 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-04-17 18:31:14,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:31:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-04-17 18:31:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:31:14,781 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:14,781 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:14,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:14,987 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-04-17 18:31:14,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:14,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326388438] [2020-04-17 18:31:14,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:15,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326388438] [2020-04-17 18:31:15,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501758316] [2020-04-17 18:31:15,149 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 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 [2020-04-17 18:31:15,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:31:15,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:15,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:31:15,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 18:31:15,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:15,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2020-04-17 18:31:15,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533084688] [2020-04-17 18:31:15,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:31:15,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:31:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:31:15,257 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 18 states. [2020-04-17 18:31:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:16,848 INFO L93 Difference]: Finished difference Result 262 states and 514 transitions. [2020-04-17 18:31:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-04-17 18:31:16,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2020-04-17 18:31:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:16,851 INFO L225 Difference]: With dead ends: 262 [2020-04-17 18:31:16,852 INFO L226 Difference]: Without dead ends: 260 [2020-04-17 18:31:16,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1143, Invalid=4113, Unknown=0, NotChecked=0, Total=5256 [2020-04-17 18:31:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-04-17 18:31:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 72. [2020-04-17 18:31:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 18:31:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 143 transitions. [2020-04-17 18:31:16,870 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 143 transitions. Word has length 16 [2020-04-17 18:31:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:16,870 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 143 transitions. [2020-04-17 18:31:16,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:31:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2020-04-17 18:31:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:31:16,872 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:16,872 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:17,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:17,078 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash 260995288, now seen corresponding path program 4 times [2020-04-17 18:31:17,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:17,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159536282] [2020-04-17 18:31:17,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:17,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159536282] [2020-04-17 18:31:17,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272445567] [2020-04-17 18:31:17,262 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 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 [2020-04-17 18:31:17,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:31:17,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:17,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:31:17,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 18:31:17,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:17,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 20 [2020-04-17 18:31:17,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451567989] [2020-04-17 18:31:17,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:31:17,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:17,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:31:17,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:31:17,423 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand 20 states. [2020-04-17 18:31:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:19,217 INFO L93 Difference]: Finished difference Result 263 states and 508 transitions. [2020-04-17 18:31:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-04-17 18:31:19,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2020-04-17 18:31:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:19,220 INFO L225 Difference]: With dead ends: 263 [2020-04-17 18:31:19,221 INFO L226 Difference]: Without dead ends: 263 [2020-04-17 18:31:19,225 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3250 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1848, Invalid=6894, Unknown=0, NotChecked=0, Total=8742 [2020-04-17 18:31:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-17 18:31:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 70. [2020-04-17 18:31:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 18:31:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-04-17 18:31:19,235 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 17 [2020-04-17 18:31:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:19,235 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-04-17 18:31:19,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:31:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-04-17 18:31:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:31:19,236 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:19,237 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:19,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:19,450 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 5 times [2020-04-17 18:31:19,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:19,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767106635] [2020-04-17 18:31:19,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:19,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767106635] [2020-04-17 18:31:19,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603781292] [2020-04-17 18:31:19,691 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 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 [2020-04-17 18:31:19,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:31:19,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:19,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:31:19,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 18:31:19,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:19,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 22 [2020-04-17 18:31:19,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740461364] [2020-04-17 18:31:19,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:31:19,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:31:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:31:19,858 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 22 states. [2020-04-17 18:31:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:23,131 INFO L93 Difference]: Finished difference Result 504 states and 1009 transitions. [2020-04-17 18:31:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-04-17 18:31:23,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-04-17 18:31:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:23,136 INFO L225 Difference]: With dead ends: 504 [2020-04-17 18:31:23,137 INFO L226 Difference]: Without dead ends: 502 [2020-04-17 18:31:23,141 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3190, Invalid=11816, Unknown=0, NotChecked=0, Total=15006 [2020-04-17 18:31:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-04-17 18:31:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 107. [2020-04-17 18:31:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-17 18:31:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 214 transitions. [2020-04-17 18:31:23,153 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 214 transitions. Word has length 19 [2020-04-17 18:31:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:23,153 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 214 transitions. [2020-04-17 18:31:23,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:31:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 214 transitions. [2020-04-17 18:31:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 18:31:23,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:23,155 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:23,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:23,359 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash 753465344, now seen corresponding path program 6 times [2020-04-17 18:31:23,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:23,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549912175] [2020-04-17 18:31:23,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:23,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549912175] [2020-04-17 18:31:23,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641793214] [2020-04-17 18:31:23,553 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 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 [2020-04-17 18:31:23,631 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:31:23,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:23,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:31:23,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:31:23,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:23,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 24 [2020-04-17 18:31:23,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505679339] [2020-04-17 18:31:23,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:31:23,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:23,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:31:23,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:31:23,709 INFO L87 Difference]: Start difference. First operand 107 states and 214 transitions. Second operand 24 states. [2020-04-17 18:31:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:27,042 INFO L93 Difference]: Finished difference Result 465 states and 902 transitions. [2020-04-17 18:31:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-04-17 18:31:27,042 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2020-04-17 18:31:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:27,047 INFO L225 Difference]: With dead ends: 465 [2020-04-17 18:31:27,047 INFO L226 Difference]: Without dead ends: 465 [2020-04-17 18:31:27,052 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9816 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4551, Invalid=18705, Unknown=0, NotChecked=0, Total=23256 [2020-04-17 18:31:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-04-17 18:31:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 95. [2020-04-17 18:31:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-17 18:31:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-04-17 18:31:27,062 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 20 [2020-04-17 18:31:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:27,062 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-04-17 18:31:27,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:31:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-04-17 18:31:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:31:27,063 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:27,064 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:27,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:27,268 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 7 times [2020-04-17 18:31:27,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:27,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896813464] [2020-04-17 18:31:27,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:27,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896813464] [2020-04-17 18:31:27,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615308178] [2020-04-17 18:31:27,550 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 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 [2020-04-17 18:31:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:27,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:31:27,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:31:27,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:27,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 27 [2020-04-17 18:31:27,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147949699] [2020-04-17 18:31:27,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 18:31:27,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 18:31:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:31:27,720 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 27 states. [2020-04-17 18:31:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:32,968 INFO L93 Difference]: Finished difference Result 644 states and 1248 transitions. [2020-04-17 18:31:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2020-04-17 18:31:32,969 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-04-17 18:31:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:32,974 INFO L225 Difference]: With dead ends: 644 [2020-04-17 18:31:32,974 INFO L226 Difference]: Without dead ends: 644 [2020-04-17 18:31:32,984 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20064 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8559, Invalid=35331, Unknown=0, NotChecked=0, Total=43890 [2020-04-17 18:31:32,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-04-17 18:31:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 109. [2020-04-17 18:31:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-04-17 18:31:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 214 transitions. [2020-04-17 18:31:33,014 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 214 transitions. Word has length 22 [2020-04-17 18:31:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:33,014 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 214 transitions. [2020-04-17 18:31:33,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 18:31:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 214 transitions. [2020-04-17 18:31:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 18:31:33,020 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:33,020 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:33,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:33,236 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1928037594, now seen corresponding path program 8 times [2020-04-17 18:31:33,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:33,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637303] [2020-04-17 18:31:33,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:33,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637303] [2020-04-17 18:31:33,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307825593] [2020-04-17 18:31:33,608 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 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 [2020-04-17 18:31:33,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:31:33,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:33,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:31:33,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:31:33,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:33,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 30 [2020-04-17 18:31:33,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847839458] [2020-04-17 18:31:33,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-17 18:31:33,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-17 18:31:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:31:33,868 INFO L87 Difference]: Start difference. First operand 109 states and 214 transitions. Second operand 30 states. [2020-04-17 18:31:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:41,514 INFO L93 Difference]: Finished difference Result 858 states and 1662 transitions. [2020-04-17 18:31:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2020-04-17 18:31:41,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 24 [2020-04-17 18:31:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:41,521 INFO L225 Difference]: With dead ends: 858 [2020-04-17 18:31:41,521 INFO L226 Difference]: Without dead ends: 858 [2020-04-17 18:31:41,526 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36288 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=14784, Invalid=60018, Unknown=0, NotChecked=0, Total=74802 [2020-04-17 18:31:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-04-17 18:31:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 123. [2020-04-17 18:31:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 18:31:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 242 transitions. [2020-04-17 18:31:41,539 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 242 transitions. Word has length 24 [2020-04-17 18:31:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:41,540 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 242 transitions. [2020-04-17 18:31:41,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-17 18:31:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 242 transitions. [2020-04-17 18:31:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 18:31:41,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:41,544 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:41,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:41,756 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1497013351, now seen corresponding path program 9 times [2020-04-17 18:31:41,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:41,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270947356] [2020-04-17 18:31:41,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:31:42,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270947356] [2020-04-17 18:31:42,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790099140] [2020-04-17 18:31:42,028 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 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 [2020-04-17 18:31:42,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:31:42,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:42,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:31:42,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-04-17 18:31:42,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:42,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 29 [2020-04-17 18:31:42,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775668808] [2020-04-17 18:31:42,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-04-17 18:31:42,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-17 18:31:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:31:42,195 INFO L87 Difference]: Start difference. First operand 123 states and 242 transitions. Second operand 29 states. [2020-04-17 18:31:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:52,208 INFO L93 Difference]: Finished difference Result 1753 states and 3655 transitions. [2020-04-17 18:31:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2020-04-17 18:31:52,209 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 26 [2020-04-17 18:31:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:52,219 INFO L225 Difference]: With dead ends: 1753 [2020-04-17 18:31:52,220 INFO L226 Difference]: Without dead ends: 1749 [2020-04-17 18:31:52,224 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50090 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=20909, Invalid=78631, Unknown=0, NotChecked=0, Total=99540 [2020-04-17 18:31:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2020-04-17 18:31:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 200. [2020-04-17 18:31:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:31:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 404 transitions. [2020-04-17 18:31:52,242 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 404 transitions. Word has length 26 [2020-04-17 18:31:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:52,242 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 404 transitions. [2020-04-17 18:31:52,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-04-17 18:31:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 404 transitions. [2020-04-17 18:31:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 18:31:52,244 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:52,244 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:52,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:52,451 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash 867592876, now seen corresponding path program 10 times [2020-04-17 18:31:52,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:52,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459549123] [2020-04-17 18:31:52,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:31:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459549123] [2020-04-17 18:31:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425436082] [2020-04-17 18:31:52,821 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 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 [2020-04-17 18:31:52,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:31:52,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:52,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:31:52,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-04-17 18:31:53,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:53,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 33 [2020-04-17 18:31:53,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938677935] [2020-04-17 18:31:53,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-17 18:31:53,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-17 18:31:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:31:53,061 INFO L87 Difference]: Start difference. First operand 200 states and 404 transitions. Second operand 33 states. [2020-04-17 18:32:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:05,192 INFO L93 Difference]: Finished difference Result 1300 states and 2550 transitions. [2020-04-17 18:32:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2020-04-17 18:32:05,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 27 [2020-04-17 18:32:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:05,199 INFO L225 Difference]: With dead ends: 1300 [2020-04-17 18:32:05,200 INFO L226 Difference]: Without dead ends: 1300 [2020-04-17 18:32:05,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70273 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=27168, Invalid=111588, Unknown=0, NotChecked=0, Total=138756 [2020-04-17 18:32:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2020-04-17 18:32:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 156. [2020-04-17 18:32:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 18:32:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 308 transitions. [2020-04-17 18:32:05,219 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 308 transitions. Word has length 27 [2020-04-17 18:32:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:05,219 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 308 transitions. [2020-04-17 18:32:05,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-17 18:32:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 308 transitions. [2020-04-17 18:32:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:32:05,220 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:05,220 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:05,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:05,425 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash -441398951, now seen corresponding path program 11 times [2020-04-17 18:32:05,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:05,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453384780] [2020-04-17 18:32:05,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:32:05,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453384780] [2020-04-17 18:32:05,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96192374] [2020-04-17 18:32:05,721 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 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 [2020-04-17 18:32:05,784 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 18:32:05,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:05,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:32:05,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-04-17 18:32:05,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:05,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 33 [2020-04-17 18:32:05,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860088786] [2020-04-17 18:32:05,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-17 18:32:05,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:05,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-17 18:32:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:32:05,886 INFO L87 Difference]: Start difference. First operand 156 states and 308 transitions. Second operand 33 states. [2020-04-17 18:32:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:21,540 INFO L93 Difference]: Finished difference Result 2703 states and 5717 transitions. [2020-04-17 18:32:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 445 states. [2020-04-17 18:32:21,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 29 [2020-04-17 18:32:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:21,554 INFO L225 Difference]: With dead ends: 2703 [2020-04-17 18:32:21,554 INFO L226 Difference]: Without dead ends: 2695 [2020-04-17 18:32:21,563 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111069 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=43166, Invalid=163404, Unknown=0, NotChecked=0, Total=206570 [2020-04-17 18:32:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2020-04-17 18:32:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 336. [2020-04-17 18:32:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-04-17 18:32:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 682 transitions. [2020-04-17 18:32:21,592 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 682 transitions. Word has length 29 [2020-04-17 18:32:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:21,592 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 682 transitions. [2020-04-17 18:32:21,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-17 18:32:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 682 transitions. [2020-04-17 18:32:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 18:32:21,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:21,595 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:21,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:21,799 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 12 times [2020-04-17 18:32:21,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:21,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850484224] [2020-04-17 18:32:21,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:32:22,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850484224] [2020-04-17 18:32:22,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077900940] [2020-04-17 18:32:22,171 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 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 [2020-04-17 18:32:22,252 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 18:32:22,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:22,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:32:22,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-04-17 18:32:22,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:22,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 37 [2020-04-17 18:32:22,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764938415] [2020-04-17 18:32:22,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-17 18:32:22,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-17 18:32:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:32:22,437 INFO L87 Difference]: Start difference. First operand 336 states and 682 transitions. Second operand 37 states. [2020-04-17 18:32:42,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:42,431 INFO L93 Difference]: Finished difference Result 1941 states and 3845 transitions. [2020-04-17 18:32:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 472 states. [2020-04-17 18:32:42,431 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 30 [2020-04-17 18:32:42,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:42,440 INFO L225 Difference]: With dead ends: 1941 [2020-04-17 18:32:42,440 INFO L226 Difference]: Without dead ends: 1941 [2020-04-17 18:32:42,448 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 492 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129072 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=49342, Invalid=194200, Unknown=0, NotChecked=0, Total=243542 [2020-04-17 18:32:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2020-04-17 18:32:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 273. [2020-04-17 18:32:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-04-17 18:32:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2020-04-17 18:32:42,466 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 30 [2020-04-17 18:32:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:42,466 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2020-04-17 18:32:42,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-17 18:32:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2020-04-17 18:32:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-17 18:32:42,467 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:42,467 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:42,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:42,679 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:42,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 13 times [2020-04-17 18:32:42,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:42,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535372934] [2020-04-17 18:32:42,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:32:43,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535372934] [2020-04-17 18:32:43,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041864339] [2020-04-17 18:32:43,040 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 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 [2020-04-17 18:32:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:43,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:32:43,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-04-17 18:32:43,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:43,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 40 [2020-04-17 18:32:43,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156996742] [2020-04-17 18:32:43,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-04-17 18:32:43,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:43,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-17 18:32:43,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:32:43,302 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand 40 states. [2020-04-17 18:33:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:11,092 INFO L93 Difference]: Finished difference Result 2339 states and 4649 transitions. [2020-04-17 18:33:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 571 states. [2020-04-17 18:33:11,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 32 [2020-04-17 18:33:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:11,105 INFO L225 Difference]: With dead ends: 2339 [2020-04-17 18:33:11,105 INFO L226 Difference]: Without dead ends: 2339 [2020-04-17 18:33:11,116 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194325 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=74985, Invalid=278445, Unknown=0, NotChecked=0, Total=353430 [2020-04-17 18:33:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2020-04-17 18:33:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 211. [2020-04-17 18:33:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-04-17 18:33:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 418 transitions. [2020-04-17 18:33:11,132 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 418 transitions. Word has length 32 [2020-04-17 18:33:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:11,132 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 418 transitions. [2020-04-17 18:33:11,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-04-17 18:33:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 418 transitions. [2020-04-17 18:33:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-17 18:33:11,133 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:11,133 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:11,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:11,337 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1510869138, now seen corresponding path program 14 times [2020-04-17 18:33:11,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:11,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902371095] [2020-04-17 18:33:11,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 3 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:33:11,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902371095] [2020-04-17 18:33:11,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458213996] [2020-04-17 18:33:11,728 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 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 [2020-04-17 18:33:11,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:33:11,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:11,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:33:11,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-04-17 18:33:12,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:12,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13] total 43 [2020-04-17 18:33:12,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976698144] [2020-04-17 18:33:12,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-17 18:33:12,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:12,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-17 18:33:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:33:12,099 INFO L87 Difference]: Start difference. First operand 211 states and 418 transitions. Second operand 43 states. [2020-04-17 18:33:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:46,839 INFO L93 Difference]: Finished difference Result 2754 states and 5493 transitions. [2020-04-17 18:33:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 649 states. [2020-04-17 18:33:46,840 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 34 [2020-04-17 18:33:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:46,851 INFO L225 Difference]: With dead ends: 2754 [2020-04-17 18:33:46,851 INFO L226 Difference]: Without dead ends: 2754 [2020-04-17 18:33:46,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 673 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251897 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=96384, Invalid=358566, Unknown=0, NotChecked=0, Total=454950 [2020-04-17 18:33:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2020-04-17 18:33:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 229. [2020-04-17 18:33:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-04-17 18:33:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-04-17 18:33:46,882 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 34 [2020-04-17 18:33:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:46,882 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-04-17 18:33:46,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-17 18:33:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-04-17 18:33:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-17 18:33:46,883 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:46,883 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:47,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:47,088 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1014578501, now seen corresponding path program 15 times [2020-04-17 18:33:47,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:47,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679616877] [2020-04-17 18:33:47,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:47,662 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-04-17 18:33:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 138 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:33:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679616877] [2020-04-17 18:33:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092487074] [2020-04-17 18:33:47,726 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 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 [2020-04-17 18:33:47,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:33:47,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:47,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:33:47,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-04-17 18:33:47,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:47,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 9] total 41 [2020-04-17 18:33:47,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011081798] [2020-04-17 18:33:47,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-17 18:33:47,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-17 18:33:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:33:47,978 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 41 states. [2020-04-17 18:34:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:34:24,292 INFO L93 Difference]: Finished difference Result 5988 states and 13253 transitions. [2020-04-17 18:34:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 800 states. [2020-04-17 18:34:24,293 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 36 [2020-04-17 18:34:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:34:24,333 INFO L225 Difference]: With dead ends: 5988 [2020-04-17 18:34:24,333 INFO L226 Difference]: Without dead ends: 5976 [2020-04-17 18:34:24,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 811 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385587 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=143229, Invalid=516927, Unknown=0, NotChecked=0, Total=660156 [2020-04-17 18:34:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2020-04-17 18:34:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 619. [2020-04-17 18:34:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-04-17 18:34:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1261 transitions. [2020-04-17 18:34:24,389 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1261 transitions. Word has length 36 [2020-04-17 18:34:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:34:24,390 INFO L479 AbstractCegarLoop]: Abstraction has 619 states and 1261 transitions. [2020-04-17 18:34:24,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-17 18:34:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1261 transitions. [2020-04-17 18:34:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-17 18:34:24,392 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:34:24,392 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:34:24,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:34:24,597 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:34:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:34:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1417528960, now seen corresponding path program 16 times [2020-04-17 18:34:24,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:34:24,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075180939] [2020-04-17 18:34:24,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:34:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:34:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:34:25,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075180939] [2020-04-17 18:34:25,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979879995] [2020-04-17 18:34:25,235 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 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 [2020-04-17 18:34:25,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:34:25,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:34:25,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:34:25,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:34:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-04-17 18:34:25,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:34:25,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 47 [2020-04-17 18:34:25,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918991930] [2020-04-17 18:34:25,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-04-17 18:34:25,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:34:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-04-17 18:34:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:34:25,608 INFO L87 Difference]: Start difference. First operand 619 states and 1261 transitions. Second operand 47 states. [2020-04-17 18:35:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:35:14,953 INFO L93 Difference]: Finished difference Result 3920 states and 7797 transitions. [2020-04-17 18:35:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 797 states. [2020-04-17 18:35:14,954 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 37 [2020-04-17 18:35:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:35:14,962 INFO L225 Difference]: With dead ends: 3920 [2020-04-17 18:35:14,962 INFO L226 Difference]: Without dead ends: 3920 [2020-04-17 18:35:14,982 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 824 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384861 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=145008, Invalid=536442, Unknown=0, NotChecked=0, Total=681450 [2020-04-17 18:35:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2020-04-17 18:35:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 532. [2020-04-17 18:35:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2020-04-17 18:35:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1069 transitions. [2020-04-17 18:35:15,006 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1069 transitions. Word has length 37 [2020-04-17 18:35:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:35:15,007 INFO L479 AbstractCegarLoop]: Abstraction has 532 states and 1069 transitions. [2020-04-17 18:35:15,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-04-17 18:35:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1069 transitions. [2020-04-17 18:35:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-17 18:35:15,008 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:35:15,008 INFO L425 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:35:15,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:35:15,212 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:35:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:35:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash -299405075, now seen corresponding path program 17 times [2020-04-17 18:35:15,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:35:15,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734931509] [2020-04-17 18:35:15,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:35:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:35:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:35:15,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734931509] [2020-04-17 18:35:15,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794504289] [2020-04-17 18:35:15,742 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 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 [2020-04-17 18:35:15,808 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-04-17 18:35:15,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:35:15,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:35:15,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:35:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-04-17 18:35:16,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:35:16,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10] total 45 [2020-04-17 18:35:16,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589833274] [2020-04-17 18:35:16,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-17 18:35:16,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:35:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-17 18:35:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:35:16,010 INFO L87 Difference]: Start difference. First operand 532 states and 1069 transitions. Second operand 45 states. Received shutdown request... [2020-04-17 18:35:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-04-17 18:35:17,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:35:17,628 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:35:17,633 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:35:17,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:35:17 BasicIcfg [2020-04-17 18:35:17,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:35:17,635 INFO L168 Benchmark]: Toolchain (without parser) took 252646.31 ms. Allocated memory was 145.8 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 100.0 MB in the beginning and 136.1 MB in the end (delta: -36.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,635 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,636 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1035.59 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 98.1 MB in the beginning and 109.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,636 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.40 ms. Allocated memory is still 204.5 MB. Free memory was 109.6 MB in the beginning and 106.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,637 INFO L168 Benchmark]: Boogie Preprocessor took 38.14 ms. Allocated memory is still 204.5 MB. Free memory was 106.9 MB in the beginning and 104.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,637 INFO L168 Benchmark]: RCFGBuilder took 563.74 ms. Allocated memory was 204.5 MB in the beginning and 238.0 MB in the end (delta: 33.6 MB). Free memory was 104.9 MB in the beginning and 196.3 MB in the end (delta: -91.5 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,638 INFO L168 Benchmark]: TraceAbstraction took 250919.19 ms. Allocated memory was 238.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 196.3 MB in the beginning and 136.1 MB in the end (delta: 60.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2020-04-17 18:35:17,641 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1035.59 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 98.1 MB in the beginning and 109.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.40 ms. Allocated memory is still 204.5 MB. Free memory was 109.6 MB in the beginning and 106.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.14 ms. Allocated memory is still 204.5 MB. Free memory was 106.9 MB in the beginning and 104.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 563.74 ms. Allocated memory was 204.5 MB in the beginning and 238.0 MB in the end (delta: 33.6 MB). Free memory was 104.9 MB in the beginning and 196.3 MB in the end (delta: -91.5 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250919.19 ms. Allocated memory was 238.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 196.3 MB in the beginning and 136.1 MB in the end (delta: 60.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 5.1s, 82 ProgramPointsBefore, 15 ProgramPointsAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 328 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 510 CheckedPairsTotal, 78 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 (532states) and FLOYD_HOARE automaton (currently 53 states, 45 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 250.8s, OverallIterations: 19, TraceHistogramMax: 12, AutomataDifference: 231.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 249 SDtfs, 4391 SDslu, 3013 SDs, 0 SdLazy, 11466 SolverSat, 8017 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6079 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 5595 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656962 ImplicationChecksByTransitivity, 213.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=619occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 22629 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 892 NumberOfCodeBlocks, 850 NumberOfCodeBlocksAsserted, 85 NumberOfCheckSat, 855 ConstructedInterpolants, 0 QuantifiedInterpolants, 85095 SizeOfPredicates, 18 NumberOfNonLiveVariables, 2675 ConjunctsInSsa, 129 ConjunctsInUnsatCore, 37 InterpolantComputations, 2 PerfectInterpolantSequences, 609/2278 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown