/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 12:26:15,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:26:15,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:26:15,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:26:15,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:26:15,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:26:15,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:26:15,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:26:15,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:26:15,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:26:15,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:26:15,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:26:15,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:26:15,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:26:15,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:26:15,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:26:15,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:26:15,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:26:15,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:26:15,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:26:15,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:26:15,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:26:15,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:26:15,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:26:15,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 12:26:15,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 12:26:15,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 12:26:15,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 12:26:15,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 12:26:15,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 12:26:15,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:26:15,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:26:15,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:26:15,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:26:15,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:26:15,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:26:15,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:26:15,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:26:15,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:26:15,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:26:15,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:26:15,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-16 12:26:15,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:26:15,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:26:15,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:26:15,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:26:15,982 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:26:15,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:26:15,982 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:26:15,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:26:15,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:26:15,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:26:15,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:26:15,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:26:15,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:26:15,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:26:15,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:26:15,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:26:15,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:26:15,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:26:15,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:26:15,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:26:15,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:26:15,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:26:15,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:26:15,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:26:15,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:26:15,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:26:15,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:26:15,988 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-16 12:26:15,988 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:26:15,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:26:15,988 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-16 12:26:16,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:26:16,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:26:16,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:26:16,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:26:16,315 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:26:16,315 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-10-16 12:26:16,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc4c049cb/f98447502de84f04bed1a9277322d287/FLAG178cdb0bc [2020-10-16 12:26:16,932 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:26:16,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/sigma.i [2020-10-16 12:26:16,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc4c049cb/f98447502de84f04bed1a9277322d287/FLAG178cdb0bc [2020-10-16 12:26:17,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc4c049cb/f98447502de84f04bed1a9277322d287 [2020-10-16 12:26:17,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:26:17,191 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:26:17,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:26:17,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:26:17,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:26:17,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:26:17" (1/1) ... [2020-10-16 12:26:17,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a78847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:17, skipping insertion in model container [2020-10-16 12:26:17,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:26:17" (1/1) ... [2020-10-16 12:26:17,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:26:17,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:26:17,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:26:17,873 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:26:17,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:26:18,138 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:26:18,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18 WrapperNode [2020-10-16 12:26:18,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:26:18,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:26:18,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:26:18,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:26:18,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:26:18,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:26:18,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:26:18,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:26:18,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... [2020-10-16 12:26:18,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:26:18,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:26:18,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:26:18,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:26:18,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:26:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-16 12:26:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:26:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 12:26:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:26:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-16 12:26:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-16 12:26:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-10-16 12:26:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-10-16 12:26:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:26:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:26:18,319 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:26:18,769 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:26:18,769 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-16 12:26:18,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:26:18 BoogieIcfgContainer [2020-10-16 12:26:18,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:26:18,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:26:18,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:26:18,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:26:18,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:26:17" (1/3) ... [2020-10-16 12:26:18,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e05590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:26:18, skipping insertion in model container [2020-10-16 12:26:18,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:26:18" (2/3) ... [2020-10-16 12:26:18,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e05590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:26:18, skipping insertion in model container [2020-10-16 12:26:18,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:26:18" (3/3) ... [2020-10-16 12:26:18,783 INFO L111 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-10-16 12:26:18,795 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:26:18,796 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:26:18,803 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:26:18,803 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:26:18,828 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,828 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,828 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,829 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,829 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,829 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,833 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,834 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,834 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,834 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:18,841 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 12:26:18,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:18,878 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:18,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:18,878 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:18,879 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:18,879 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:18,879 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:18,879 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:18,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:18,893 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:18,894 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 176 flow [2020-10-16 12:26:18,897 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 84 transitions, 176 flow [2020-10-16 12:26:18,899 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-16 12:26:18,954 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-16 12:26:18,954 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 12:26:18,959 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-10-16 12:26:18,962 INFO L117 LiptonReduction]: Number of co-enabled transitions 344 [2020-10-16 12:26:20,473 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-16 12:26:20,838 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-16 12:26:20,949 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-16 12:26:20,953 INFO L132 LiptonReduction]: Checked pairs total: 432 [2020-10-16 12:26:20,954 INFO L134 LiptonReduction]: Total number of compositions: 83 [2020-10-16 12:26:20,961 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 42 flow [2020-10-16 12:26:20,970 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 36 states. [2020-10-16 12:26:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-16 12:26:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:20,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:20,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:20,980 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash 10051566, now seen corresponding path program 1 times [2020-10-16 12:26:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:21,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028271530] [2020-10-16 12:26:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:21,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028271530] [2020-10-16 12:26:21,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:21,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [668385244] [2020-10-16 12:26:21,189 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:21,191 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:21,206 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:21,206 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:21,210 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:21,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:21,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:21,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:21,228 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-16 12:26:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:21,268 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-16 12:26:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:21,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:21,280 INFO L225 Difference]: With dead ends: 36 [2020-10-16 12:26:21,281 INFO L226 Difference]: Without dead ends: 31 [2020-10-16 12:26:21,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-16 12:26:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-16 12:26:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 12:26:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-10-16 12:26:21,323 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 4 [2020-10-16 12:26:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:21,323 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-10-16 12:26:21,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-10-16 12:26:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 12:26:21,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:21,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:21,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:26:21,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash -352775593, now seen corresponding path program 1 times [2020-10-16 12:26:21,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:21,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67111299] [2020-10-16 12:26:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:21,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67111299] [2020-10-16 12:26:21,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:21,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:21,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [637929115] [2020-10-16 12:26:21,436 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:21,438 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:21,442 INFO L258 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-10-16 12:26:21,442 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:21,443 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:21,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:21,445 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-10-16 12:26:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:21,476 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-10-16 12:26:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:21,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-16 12:26:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:21,478 INFO L225 Difference]: With dead ends: 28 [2020-10-16 12:26:21,478 INFO L226 Difference]: Without dead ends: 28 [2020-10-16 12:26:21,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-16 12:26:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-16 12:26:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 12:26:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-16 12:26:21,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 9 [2020-10-16 12:26:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:21,485 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-16 12:26:21,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-16 12:26:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:21,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:21,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-10-16 12:26:21,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 12:26:21,487 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1949275916, now seen corresponding path program 1 times [2020-10-16 12:26:21,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:21,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658646112] [2020-10-16 12:26:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:21,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:21,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:21,611 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:26:21,612 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:26:21,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 12:26:21,612 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:21,614 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:26:21,614 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 12:26:21,621 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,621 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,622 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,622 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,622 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,622 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,623 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,623 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,623 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,623 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,623 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,623 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,624 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,624 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,624 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,625 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,626 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,626 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,626 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,627 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:21,629 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2020-10-16 12:26:21,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:21,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:21,630 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:21,630 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:21,630 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:21,630 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:21,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:21,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:21,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:21,633 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:21,634 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 198 flow [2020-10-16 12:26:21,634 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 90 transitions, 198 flow [2020-10-16 12:26:21,634 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-16 12:26:21,679 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-16 12:26:21,679 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 12:26:21,681 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-10-16 12:26:21,684 INFO L117 LiptonReduction]: Number of co-enabled transitions 824 [2020-10-16 12:26:23,056 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-16 12:26:23,331 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-16 12:26:23,639 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-16 12:26:23,746 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-16 12:26:23,762 INFO L132 LiptonReduction]: Checked pairs total: 1197 [2020-10-16 12:26:23,762 INFO L134 LiptonReduction]: Total number of compositions: 85 [2020-10-16 12:26:23,763 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 62 flow [2020-10-16 12:26:23,768 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 109 states. [2020-10-16 12:26:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-10-16 12:26:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:23,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:23,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:23,769 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 15623651, now seen corresponding path program 1 times [2020-10-16 12:26:23,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:23,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327010987] [2020-10-16 12:26:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:23,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327010987] [2020-10-16 12:26:23,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:23,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:23,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930628940] [2020-10-16 12:26:23,811 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:23,811 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:23,812 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:23,812 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:23,813 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:23,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:23,814 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-10-16 12:26:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:23,838 INFO L93 Difference]: Finished difference Result 109 states and 191 transitions. [2020-10-16 12:26:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:23,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:23,842 INFO L225 Difference]: With dead ends: 109 [2020-10-16 12:26:23,842 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 12:26:23,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 12:26:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-16 12:26:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 12:26:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 174 transitions. [2020-10-16 12:26:23,856 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 174 transitions. Word has length 4 [2020-10-16 12:26:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:23,857 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 174 transitions. [2020-10-16 12:26:23,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 174 transitions. [2020-10-16 12:26:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:23,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:23,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:23,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 12:26:23,858 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash 125559316, now seen corresponding path program 1 times [2020-10-16 12:26:23,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:23,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624707817] [2020-10-16 12:26:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:23,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624707817] [2020-10-16 12:26:23,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:23,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:23,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605320761] [2020-10-16 12:26:23,924 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:23,925 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:23,929 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:26:23,929 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:23,929 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:23,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:23,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:23,930 INFO L87 Difference]: Start difference. First operand 98 states and 174 transitions. Second operand 4 states. [2020-10-16 12:26:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:23,963 INFO L93 Difference]: Finished difference Result 103 states and 171 transitions. [2020-10-16 12:26:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:23,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:26:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:23,966 INFO L225 Difference]: With dead ends: 103 [2020-10-16 12:26:23,966 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 12:26:23,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 12:26:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-16 12:26:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 12:26:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-10-16 12:26:23,979 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 10 [2020-10-16 12:26:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:23,980 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-10-16 12:26:23,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-10-16 12:26:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:23,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:23,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:23,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 12:26:23,985 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash 823605760, now seen corresponding path program 1 times [2020-10-16 12:26:23,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:23,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105719027] [2020-10-16 12:26:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:24,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105719027] [2020-10-16 12:26:24,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957748969] [2020-10-16 12:26:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:26:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:24,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:24,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:26:24,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982773907] [2020-10-16 12:26:24,151 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:24,172 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:24,177 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:26:24,178 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:24,226 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:24,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:24,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:24,228 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 4 states. [2020-10-16 12:26:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:24,264 INFO L93 Difference]: Finished difference Result 95 states and 159 transitions. [2020-10-16 12:26:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:24,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:26:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:24,266 INFO L225 Difference]: With dead ends: 95 [2020-10-16 12:26:24,267 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 12:26:24,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 12:26:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-16 12:26:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-16 12:26:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-10-16 12:26:24,278 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 17 [2020-10-16 12:26:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:24,278 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-10-16 12:26:24,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-10-16 12:26:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:24,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:24,280 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-10-16 12:26:24,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 12:26:24,495 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 26114190, now seen corresponding path program 1 times [2020-10-16 12:26:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:24,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820457732] [2020-10-16 12:26:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:24,532 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:24,563 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:24,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:26:24,582 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:26:24,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 12:26:24,583 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:24,583 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:26:24,584 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 12:26:24,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,591 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,591 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,592 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,592 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,593 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,593 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,595 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,595 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,595 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,597 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,597 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,597 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,598 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,598 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,599 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,599 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:24,602 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2020-10-16 12:26:24,602 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:24,602 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:24,602 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:24,603 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:24,603 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:24,603 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:24,603 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:24,603 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:24,603 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:24,606 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:24,606 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 96 transitions, 222 flow [2020-10-16 12:26:24,607 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 96 transitions, 222 flow [2020-10-16 12:26:24,607 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-16 12:26:24,683 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-16 12:26:24,683 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 12:26:24,685 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-10-16 12:26:24,694 INFO L117 LiptonReduction]: Number of co-enabled transitions 1320 [2020-10-16 12:26:26,384 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-16 12:26:26,673 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-16 12:26:26,782 INFO L132 LiptonReduction]: Checked pairs total: 2069 [2020-10-16 12:26:26,782 INFO L134 LiptonReduction]: Total number of compositions: 90 [2020-10-16 12:26:26,783 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 80 flow [2020-10-16 12:26:26,793 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 297 states. [2020-10-16 12:26:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2020-10-16 12:26:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:26,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:26,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:26,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 21531642, now seen corresponding path program 1 times [2020-10-16 12:26:26,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:26,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980444690] [2020-10-16 12:26:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:26,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980444690] [2020-10-16 12:26:26,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:26,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:26,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1450260464] [2020-10-16 12:26:26,828 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:26,829 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:26,829 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:26,829 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:26,830 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:26,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:26,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:26,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:26,831 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2020-10-16 12:26:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:26,879 INFO L93 Difference]: Finished difference Result 297 states and 636 transitions. [2020-10-16 12:26:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:26,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:26,883 INFO L225 Difference]: With dead ends: 297 [2020-10-16 12:26:26,883 INFO L226 Difference]: Without dead ends: 268 [2020-10-16 12:26:26,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-16 12:26:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-16 12:26:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 12:26:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 580 transitions. [2020-10-16 12:26:26,908 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 580 transitions. Word has length 4 [2020-10-16 12:26:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:26,908 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 580 transitions. [2020-10-16 12:26:26,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 580 transitions. [2020-10-16 12:26:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:26,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:26,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:26,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 12:26:26,910 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:26,910 INFO L82 PathProgramCache]: Analyzing trace with hash 656916489, now seen corresponding path program 1 times [2020-10-16 12:26:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:26,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225966854] [2020-10-16 12:26:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:26,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225966854] [2020-10-16 12:26:26,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:26,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:26,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200727765] [2020-10-16 12:26:26,946 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:26,947 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:26,948 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:26:26,948 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:26,949 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:26,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:26,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:26,950 INFO L87 Difference]: Start difference. First operand 268 states and 580 transitions. Second operand 4 states. [2020-10-16 12:26:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:26,984 INFO L93 Difference]: Finished difference Result 299 states and 612 transitions. [2020-10-16 12:26:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:26,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:26:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:26,987 INFO L225 Difference]: With dead ends: 299 [2020-10-16 12:26:26,988 INFO L226 Difference]: Without dead ends: 299 [2020-10-16 12:26:26,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-16 12:26:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 277. [2020-10-16 12:26:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-16 12:26:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 577 transitions. [2020-10-16 12:26:27,006 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 577 transitions. Word has length 10 [2020-10-16 12:26:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:27,006 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 577 transitions. [2020-10-16 12:26:27,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 577 transitions. [2020-10-16 12:26:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:27,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:27,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:27,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 12:26:27,008 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1586347520, now seen corresponding path program 1 times [2020-10-16 12:26:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:27,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007894831] [2020-10-16 12:26:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007894831] [2020-10-16 12:26:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767468410] [2020-10-16 12:26:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:26:27,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:27,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:27,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:26:27,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423432912] [2020-10-16 12:26:27,191 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:27,195 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:27,200 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:26:27,200 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:27,234 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:27,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:27,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:27,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:27,236 INFO L87 Difference]: Start difference. First operand 277 states and 577 transitions. Second operand 4 states. [2020-10-16 12:26:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:27,273 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2020-10-16 12:26:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:27,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:26:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:27,276 INFO L225 Difference]: With dead ends: 275 [2020-10-16 12:26:27,277 INFO L226 Difference]: Without dead ends: 275 [2020-10-16 12:26:27,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-16 12:26:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-10-16 12:26:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-16 12:26:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 572 transitions. [2020-10-16 12:26:27,297 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 572 transitions. Word has length 17 [2020-10-16 12:26:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:27,297 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 572 transitions. [2020-10-16 12:26:27,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 572 transitions. [2020-10-16 12:26:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:26:27,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:27,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:27,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 12:26:27,519 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:27,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1691264658, now seen corresponding path program 1 times [2020-10-16 12:26:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:27,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865065107] [2020-10-16 12:26:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:27,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865065107] [2020-10-16 12:26:27,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107086151] [2020-10-16 12:26:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:27,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:26:27,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:27,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:27,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 12:26:27,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390916706] [2020-10-16 12:26:27,683 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:27,688 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:27,694 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-16 12:26:27,695 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:27,708 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:27,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:26:27,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:26:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:27,710 INFO L87 Difference]: Start difference. First operand 275 states and 572 transitions. Second operand 5 states. [2020-10-16 12:26:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:27,752 INFO L93 Difference]: Finished difference Result 271 states and 560 transitions. [2020-10-16 12:26:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:26:27,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 12:26:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:27,754 INFO L225 Difference]: With dead ends: 271 [2020-10-16 12:26:27,755 INFO L226 Difference]: Without dead ends: 271 [2020-10-16 12:26:27,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-16 12:26:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-10-16 12:26:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 12:26:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 560 transitions. [2020-10-16 12:26:27,764 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 560 transitions. Word has length 23 [2020-10-16 12:26:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:27,764 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 560 transitions. [2020-10-16 12:26:27,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:26:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 560 transitions. [2020-10-16 12:26:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:26:27,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:27,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-10-16 12:26:27,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 12:26:27,980 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash 539631963, now seen corresponding path program 1 times [2020-10-16 12:26:27,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:27,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331132530] [2020-10-16 12:26:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:28,005 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:28,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:28,033 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:26:28,033 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:26:28,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 12:26:28,034 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:28,034 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:26:28,035 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 12:26:28,041 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,041 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,041 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,042 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,042 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,042 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,042 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,042 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,043 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,043 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,043 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,043 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,043 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,043 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,044 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,044 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,044 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,044 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,045 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,045 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,045 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,045 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,045 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,046 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,046 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,046 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,047 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,047 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,047 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,048 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,049 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,049 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,049 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,049 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,050 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,050 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,051 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,051 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:28,054 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-16 12:26:28,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:28,055 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:28,055 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:28,055 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:28,055 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:28,055 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:28,056 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:28,056 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:28,056 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:28,057 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:28,057 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 248 flow [2020-10-16 12:26:28,058 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 102 transitions, 248 flow [2020-10-16 12:26:28,058 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-16 12:26:28,136 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-16 12:26:28,137 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 12:26:28,139 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-10-16 12:26:28,149 INFO L117 LiptonReduction]: Number of co-enabled transitions 1872 [2020-10-16 12:26:29,733 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-16 12:26:30,053 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-16 12:26:30,156 INFO L132 LiptonReduction]: Checked pairs total: 3489 [2020-10-16 12:26:30,156 INFO L134 LiptonReduction]: Total number of compositions: 90 [2020-10-16 12:26:30,156 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 100 flow [2020-10-16 12:26:30,182 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 817 states. [2020-10-16 12:26:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2020-10-16 12:26:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:30,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:30,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:30,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 27625699, now seen corresponding path program 1 times [2020-10-16 12:26:30,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:30,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373703699] [2020-10-16 12:26:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373703699] [2020-10-16 12:26:30,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:30,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1630343300] [2020-10-16 12:26:30,210 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:30,211 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:30,211 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:30,211 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:30,212 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:30,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:30,213 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 3 states. [2020-10-16 12:26:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:30,245 INFO L93 Difference]: Finished difference Result 817 states and 2065 transitions. [2020-10-16 12:26:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:30,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:30,252 INFO L225 Difference]: With dead ends: 817 [2020-10-16 12:26:30,252 INFO L226 Difference]: Without dead ends: 734 [2020-10-16 12:26:30,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-16 12:26:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-16 12:26:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-16 12:26:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1874 transitions. [2020-10-16 12:26:30,278 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1874 transitions. Word has length 4 [2020-10-16 12:26:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:30,279 INFO L481 AbstractCegarLoop]: Abstraction has 734 states and 1874 transitions. [2020-10-16 12:26:30,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1874 transitions. [2020-10-16 12:26:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:30,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:30,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:30,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-16 12:26:30,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash -399158139, now seen corresponding path program 1 times [2020-10-16 12:26:30,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:30,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135440934] [2020-10-16 12:26:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:30,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135440934] [2020-10-16 12:26:30,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:30,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:30,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1997085057] [2020-10-16 12:26:30,329 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:30,333 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:30,335 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:26:30,336 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:30,336 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:30,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:30,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:30,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:30,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:30,337 INFO L87 Difference]: Start difference. First operand 734 states and 1874 transitions. Second operand 4 states. [2020-10-16 12:26:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:30,384 INFO L93 Difference]: Finished difference Result 843 states and 2061 transitions. [2020-10-16 12:26:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:30,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:26:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:30,393 INFO L225 Difference]: With dead ends: 843 [2020-10-16 12:26:30,393 INFO L226 Difference]: Without dead ends: 843 [2020-10-16 12:26:30,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-10-16 12:26:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 781. [2020-10-16 12:26:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-10-16 12:26:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1934 transitions. [2020-10-16 12:26:30,425 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1934 transitions. Word has length 10 [2020-10-16 12:26:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:30,426 INFO L481 AbstractCegarLoop]: Abstraction has 781 states and 1934 transitions. [2020-10-16 12:26:30,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1934 transitions. [2020-10-16 12:26:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:30,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:30,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:30,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-16 12:26:30,427 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:30,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2066968861, now seen corresponding path program 1 times [2020-10-16 12:26:30,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:30,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706527749] [2020-10-16 12:26:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:30,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706527749] [2020-10-16 12:26:30,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922142096] [2020-10-16 12:26:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:26:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:30,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:30,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:26:30,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1747151443] [2020-10-16 12:26:30,608 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:30,611 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:30,616 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:26:30,616 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:30,648 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:30,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:30,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:30,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:30,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:30,650 INFO L87 Difference]: Start difference. First operand 781 states and 1934 transitions. Second operand 4 states. [2020-10-16 12:26:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:30,698 INFO L93 Difference]: Finished difference Result 779 states and 1929 transitions. [2020-10-16 12:26:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:30,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:26:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:30,705 INFO L225 Difference]: With dead ends: 779 [2020-10-16 12:26:30,705 INFO L226 Difference]: Without dead ends: 779 [2020-10-16 12:26:30,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-16 12:26:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2020-10-16 12:26:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-10-16 12:26:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1929 transitions. [2020-10-16 12:26:30,730 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1929 transitions. Word has length 17 [2020-10-16 12:26:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:30,731 INFO L481 AbstractCegarLoop]: Abstraction has 779 states and 1929 transitions. [2020-10-16 12:26:30,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1929 transitions. [2020-10-16 12:26:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:26:30,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:30,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:30,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:30,946 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:30,946 INFO L82 PathProgramCache]: Analyzing trace with hash 899828126, now seen corresponding path program 1 times [2020-10-16 12:26:30,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:30,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357246648] [2020-10-16 12:26:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357246648] [2020-10-16 12:26:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931957894] [2020-10-16 12:26:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:26:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:31,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:31,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 12:26:31,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152629988] [2020-10-16 12:26:31,104 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:31,111 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:31,123 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-16 12:26:31,123 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:31,140 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:31,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:26:31,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:31,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:26:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:31,141 INFO L87 Difference]: Start difference. First operand 779 states and 1929 transitions. Second operand 5 states. [2020-10-16 12:26:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:31,191 INFO L93 Difference]: Finished difference Result 775 states and 1917 transitions. [2020-10-16 12:26:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:26:31,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 12:26:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:31,196 INFO L225 Difference]: With dead ends: 775 [2020-10-16 12:26:31,197 INFO L226 Difference]: Without dead ends: 775 [2020-10-16 12:26:31,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-16 12:26:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-10-16 12:26:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-10-16 12:26:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1917 transitions. [2020-10-16 12:26:31,223 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1917 transitions. Word has length 23 [2020-10-16 12:26:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:31,224 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 1917 transitions. [2020-10-16 12:26:31,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:26:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1917 transitions. [2020-10-16 12:26:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:26:31,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:31,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:31,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 12:26:31,440 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:31,440 INFO L82 PathProgramCache]: Analyzing trace with hash -683367746, now seen corresponding path program 1 times [2020-10-16 12:26:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:31,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154014466] [2020-10-16 12:26:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:31,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154014466] [2020-10-16 12:26:31,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728254129] [2020-10-16 12:26:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:26:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:31,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:31,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 12:26:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [736419266] [2020-10-16 12:26:31,649 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:31,654 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:31,663 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-16 12:26:31,663 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:31,675 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:31,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:26:31,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:31,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:26:31,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:31,676 INFO L87 Difference]: Start difference. First operand 775 states and 1917 transitions. Second operand 6 states. [2020-10-16 12:26:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:31,726 INFO L93 Difference]: Finished difference Result 767 states and 1889 transitions. [2020-10-16 12:26:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:26:31,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 12:26:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:31,731 INFO L225 Difference]: With dead ends: 767 [2020-10-16 12:26:31,732 INFO L226 Difference]: Without dead ends: 767 [2020-10-16 12:26:31,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-16 12:26:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2020-10-16 12:26:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-16 12:26:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1889 transitions. [2020-10-16 12:26:31,753 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1889 transitions. Word has length 29 [2020-10-16 12:26:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:31,753 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 1889 transitions. [2020-10-16 12:26:31,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:26:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1889 transitions. [2020-10-16 12:26:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:26:31,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:31,755 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:31,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 12:26:31,969 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1728417408, now seen corresponding path program 1 times [2020-10-16 12:26:31,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:31,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271018079] [2020-10-16 12:26:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:31,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:32,023 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:32,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:26:32,045 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:26:32,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 12:26:32,046 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:32,046 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:32,048 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:26:32,049 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 12:26:32,057 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,057 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,057 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,057 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,058 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,058 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,059 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,059 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,059 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,059 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,059 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,059 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,061 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,062 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,062 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,063 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,069 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,070 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,070 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,070 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,071 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,071 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,071 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,071 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,072 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,072 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,073 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,073 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,073 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,073 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,074 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,074 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:32,077 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2020-10-16 12:26:32,077 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:32,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:32,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:32,078 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:32,078 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:32,078 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:32,078 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:32,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:32,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:32,080 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:32,080 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 276 flow [2020-10-16 12:26:32,081 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 108 transitions, 276 flow [2020-10-16 12:26:32,081 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-16 12:26:32,259 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-16 12:26:32,260 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 12:26:32,265 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-10-16 12:26:32,286 INFO L117 LiptonReduction]: Number of co-enabled transitions 2480 [2020-10-16 12:26:33,835 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-16 12:26:34,138 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-16 12:26:34,233 INFO L132 LiptonReduction]: Checked pairs total: 4239 [2020-10-16 12:26:34,233 INFO L134 LiptonReduction]: Total number of compositions: 93 [2020-10-16 12:26:34,234 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 31 transitions, 122 flow [2020-10-16 12:26:34,341 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2289 states. [2020-10-16 12:26:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states. [2020-10-16 12:26:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:34,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:34,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:34,342 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:34,342 INFO L82 PathProgramCache]: Analyzing trace with hash 33997000, now seen corresponding path program 1 times [2020-10-16 12:26:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:34,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563261484] [2020-10-16 12:26:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:34,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563261484] [2020-10-16 12:26:34,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:34,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:34,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1862504091] [2020-10-16 12:26:34,369 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:34,369 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:34,370 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:34,370 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:34,370 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:34,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:34,371 INFO L87 Difference]: Start difference. First operand 2289 states. Second operand 3 states. [2020-10-16 12:26:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:34,412 INFO L93 Difference]: Finished difference Result 2289 states and 6658 transitions. [2020-10-16 12:26:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:34,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:34,428 INFO L225 Difference]: With dead ends: 2289 [2020-10-16 12:26:34,428 INFO L226 Difference]: Without dead ends: 2044 [2020-10-16 12:26:34,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-10-16 12:26:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2020-10-16 12:26:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-10-16 12:26:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6008 transitions. [2020-10-16 12:26:34,497 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6008 transitions. Word has length 4 [2020-10-16 12:26:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:34,498 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 6008 transitions. [2020-10-16 12:26:34,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6008 transitions. [2020-10-16 12:26:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:34,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:34,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:34,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 12:26:34,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1850212091, now seen corresponding path program 1 times [2020-10-16 12:26:34,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:34,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367701549] [2020-10-16 12:26:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:34,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367701549] [2020-10-16 12:26:34,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:34,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [505996631] [2020-10-16 12:26:34,533 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:34,534 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:34,535 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:26:34,535 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:34,535 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:34,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:34,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:34,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:34,536 INFO L87 Difference]: Start difference. First operand 2044 states and 6008 transitions. Second operand 4 states. [2020-10-16 12:26:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:34,635 INFO L93 Difference]: Finished difference Result 2379 states and 6766 transitions. [2020-10-16 12:26:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:34,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:26:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:34,653 INFO L225 Difference]: With dead ends: 2379 [2020-10-16 12:26:34,653 INFO L226 Difference]: Without dead ends: 2379 [2020-10-16 12:26:34,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-10-16 12:26:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2221. [2020-10-16 12:26:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-10-16 12:26:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6367 transitions. [2020-10-16 12:26:34,741 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6367 transitions. Word has length 10 [2020-10-16 12:26:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:34,741 INFO L481 AbstractCegarLoop]: Abstraction has 2221 states and 6367 transitions. [2020-10-16 12:26:34,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6367 transitions. [2020-10-16 12:26:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:34,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:34,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:34,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-16 12:26:34,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:34,743 INFO L82 PathProgramCache]: Analyzing trace with hash -50306259, now seen corresponding path program 1 times [2020-10-16 12:26:34,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:34,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901463994] [2020-10-16 12:26:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:34,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901463994] [2020-10-16 12:26:34,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455082091] [2020-10-16 12:26:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:26:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:34,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:34,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:26:34,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [290106782] [2020-10-16 12:26:34,887 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:34,890 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:34,893 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:26:34,893 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:34,914 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:34,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:34,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:34,915 INFO L87 Difference]: Start difference. First operand 2221 states and 6367 transitions. Second operand 4 states. [2020-10-16 12:26:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:34,959 INFO L93 Difference]: Finished difference Result 2219 states and 6362 transitions. [2020-10-16 12:26:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:34,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:26:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:34,974 INFO L225 Difference]: With dead ends: 2219 [2020-10-16 12:26:34,975 INFO L226 Difference]: Without dead ends: 2219 [2020-10-16 12:26:34,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-10-16 12:26:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2219. [2020-10-16 12:26:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2020-10-16 12:26:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 6362 transitions. [2020-10-16 12:26:35,042 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 6362 transitions. Word has length 17 [2020-10-16 12:26:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:35,043 INFO L481 AbstractCegarLoop]: Abstraction has 2219 states and 6362 transitions. [2020-10-16 12:26:35,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 6362 transitions. [2020-10-16 12:26:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:26:35,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:35,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:35,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:35,258 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash -811477057, now seen corresponding path program 1 times [2020-10-16 12:26:35,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:35,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502779317] [2020-10-16 12:26:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:35,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502779317] [2020-10-16 12:26:35,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143962958] [2020-10-16 12:26:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:26:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:35,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:35,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 12:26:35,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431353697] [2020-10-16 12:26:35,404 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:35,407 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:35,413 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-16 12:26:35,413 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:35,425 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:35,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:26:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:26:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:35,426 INFO L87 Difference]: Start difference. First operand 2219 states and 6362 transitions. Second operand 5 states. [2020-10-16 12:26:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:35,470 INFO L93 Difference]: Finished difference Result 2215 states and 6350 transitions. [2020-10-16 12:26:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:26:35,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 12:26:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:35,485 INFO L225 Difference]: With dead ends: 2215 [2020-10-16 12:26:35,485 INFO L226 Difference]: Without dead ends: 2215 [2020-10-16 12:26:35,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-10-16 12:26:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2215. [2020-10-16 12:26:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-10-16 12:26:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6350 transitions. [2020-10-16 12:26:35,557 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6350 transitions. Word has length 23 [2020-10-16 12:26:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:35,557 INFO L481 AbstractCegarLoop]: Abstraction has 2215 states and 6350 transitions. [2020-10-16 12:26:35,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:26:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6350 transitions. [2020-10-16 12:26:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:26:35,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:35,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:35,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 12:26:35,772 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash -346309584, now seen corresponding path program 1 times [2020-10-16 12:26:35,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:35,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984163369] [2020-10-16 12:26:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:35,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984163369] [2020-10-16 12:26:35,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569012908] [2020-10-16 12:26:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:26:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:35,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:35,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 12:26:35,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621123384] [2020-10-16 12:26:35,987 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:35,996 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:36,007 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-16 12:26:36,008 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:36,022 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:36,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:26:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:26:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:36,023 INFO L87 Difference]: Start difference. First operand 2215 states and 6350 transitions. Second operand 6 states. [2020-10-16 12:26:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:36,146 INFO L93 Difference]: Finished difference Result 2207 states and 6322 transitions. [2020-10-16 12:26:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:26:36,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 12:26:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:36,167 INFO L225 Difference]: With dead ends: 2207 [2020-10-16 12:26:36,167 INFO L226 Difference]: Without dead ends: 2207 [2020-10-16 12:26:36,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-10-16 12:26:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2020-10-16 12:26:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-10-16 12:26:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6322 transitions. [2020-10-16 12:26:36,254 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6322 transitions. Word has length 29 [2020-10-16 12:26:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:36,255 INFO L481 AbstractCegarLoop]: Abstraction has 2207 states and 6322 transitions. [2020-10-16 12:26:36,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:26:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6322 transitions. [2020-10-16 12:26:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:26:36,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:36,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:36,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:36,471 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash 107769152, now seen corresponding path program 1 times [2020-10-16 12:26:36,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:36,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374302325] [2020-10-16 12:26:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:36,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374302325] [2020-10-16 12:26:36,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006990277] [2020-10-16 12:26:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:26:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:36,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:36,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 12:26:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [749179744] [2020-10-16 12:26:36,749 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:36,757 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:36,768 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-16 12:26:36,769 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:36,781 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:36,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:26:36,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:36,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:26:36,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:26:36,783 INFO L87 Difference]: Start difference. First operand 2207 states and 6322 transitions. Second operand 7 states. [2020-10-16 12:26:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:36,850 INFO L93 Difference]: Finished difference Result 2191 states and 6258 transitions. [2020-10-16 12:26:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:26:36,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-16 12:26:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:36,860 INFO L225 Difference]: With dead ends: 2191 [2020-10-16 12:26:36,860 INFO L226 Difference]: Without dead ends: 2191 [2020-10-16 12:26:36,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:26:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2020-10-16 12:26:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2191. [2020-10-16 12:26:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-10-16 12:26:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6258 transitions. [2020-10-16 12:26:36,930 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6258 transitions. Word has length 35 [2020-10-16 12:26:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:36,931 INFO L481 AbstractCegarLoop]: Abstraction has 2191 states and 6258 transitions. [2020-10-16 12:26:36,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:26:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6258 transitions. [2020-10-16 12:26:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:26:36,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:36,933 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:37,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:37,146 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash -793168517, now seen corresponding path program 1 times [2020-10-16 12:26:37,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:37,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967849910] [2020-10-16 12:26:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:37,169 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:37,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:37,201 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:26:37,201 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:26:37,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-16 12:26:37,202 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:37,202 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:37,205 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:26:37,205 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-16 12:26:37,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,216 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,216 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,217 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,217 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,221 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,221 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,221 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,221 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,221 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,221 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,222 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,222 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,223 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,223 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,223 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,223 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,224 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,225 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,225 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,225 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,231 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,231 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,231 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,232 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,232 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,233 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,233 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,233 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,234 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,234 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,234 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,234 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:37,238 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2020-10-16 12:26:37,238 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:37,239 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:37,239 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:37,239 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:37,239 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:37,239 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:37,239 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:37,239 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:37,239 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:37,241 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:37,241 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 114 transitions, 306 flow [2020-10-16 12:26:37,241 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 114 transitions, 306 flow [2020-10-16 12:26:37,242 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-16 12:26:37,634 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-16 12:26:37,634 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 12:26:37,652 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-10-16 12:26:37,699 INFO L117 LiptonReduction]: Number of co-enabled transitions 3144 [2020-10-16 12:26:39,341 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-16 12:26:39,628 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-16 12:26:39,748 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-16 12:26:39,753 INFO L132 LiptonReduction]: Checked pairs total: 5960 [2020-10-16 12:26:39,753 INFO L134 LiptonReduction]: Total number of compositions: 96 [2020-10-16 12:26:39,754 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 34 transitions, 146 flow [2020-10-16 12:26:40,040 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6529 states. [2020-10-16 12:26:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states. [2020-10-16 12:26:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:40,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:40,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:40,041 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash 40649002, now seen corresponding path program 1 times [2020-10-16 12:26:40,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:40,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477683129] [2020-10-16 12:26:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:40,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477683129] [2020-10-16 12:26:40,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:40,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1193072639] [2020-10-16 12:26:40,060 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:40,060 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:40,061 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:40,061 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:40,061 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:40,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:40,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:40,062 INFO L87 Difference]: Start difference. First operand 6529 states. Second operand 3 states. [2020-10-16 12:26:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:40,119 INFO L93 Difference]: Finished difference Result 6529 states and 21447 transitions. [2020-10-16 12:26:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:40,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:40,148 INFO L225 Difference]: With dead ends: 6529 [2020-10-16 12:26:40,148 INFO L226 Difference]: Without dead ends: 5798 [2020-10-16 12:26:40,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-16 12:26:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5798. [2020-10-16 12:26:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-10-16 12:26:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 19258 transitions. [2020-10-16 12:26:40,364 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 19258 transitions. Word has length 4 [2020-10-16 12:26:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:40,364 INFO L481 AbstractCegarLoop]: Abstraction has 5798 states and 19258 transitions. [2020-10-16 12:26:40,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 19258 transitions. [2020-10-16 12:26:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:40,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:40,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:40,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-16 12:26:40,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:40,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1545227554, now seen corresponding path program 1 times [2020-10-16 12:26:40,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:40,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415629481] [2020-10-16 12:26:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:40,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415629481] [2020-10-16 12:26:40,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:40,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:40,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [919130185] [2020-10-16 12:26:40,395 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:40,396 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:40,397 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:26:40,397 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:40,397 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:40,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:40,398 INFO L87 Difference]: Start difference. First operand 5798 states and 19258 transitions. Second operand 4 states. [2020-10-16 12:26:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:40,462 INFO L93 Difference]: Finished difference Result 6779 states and 21955 transitions. [2020-10-16 12:26:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:40,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:26:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:40,489 INFO L225 Difference]: With dead ends: 6779 [2020-10-16 12:26:40,489 INFO L226 Difference]: Without dead ends: 6779 [2020-10-16 12:26:40,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-10-16 12:26:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6397. [2020-10-16 12:26:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-10-16 12:26:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 20804 transitions. [2020-10-16 12:26:40,850 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 20804 transitions. Word has length 10 [2020-10-16 12:26:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:40,850 INFO L481 AbstractCegarLoop]: Abstraction has 6397 states and 20804 transitions. [2020-10-16 12:26:40,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 20804 transitions. [2020-10-16 12:26:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:40,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:40,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:40,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-16 12:26:40,851 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2077640958, now seen corresponding path program 1 times [2020-10-16 12:26:40,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:40,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031957572] [2020-10-16 12:26:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031957572] [2020-10-16 12:26:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143201083] [2020-10-16 12:26:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:40,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:26:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:40,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:40,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:26:40,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [196659741] [2020-10-16 12:26:40,971 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:40,973 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:40,975 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:26:40,975 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:40,997 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:40,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:40,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:40,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:40,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:40,998 INFO L87 Difference]: Start difference. First operand 6397 states and 20804 transitions. Second operand 4 states. [2020-10-16 12:26:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:41,057 INFO L93 Difference]: Finished difference Result 6395 states and 20799 transitions. [2020-10-16 12:26:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:41,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:26:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:41,083 INFO L225 Difference]: With dead ends: 6395 [2020-10-16 12:26:41,083 INFO L226 Difference]: Without dead ends: 6395 [2020-10-16 12:26:41,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2020-10-16 12:26:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6395. [2020-10-16 12:26:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-16 12:26:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 20799 transitions. [2020-10-16 12:26:41,272 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 20799 transitions. Word has length 17 [2020-10-16 12:26:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:41,272 INFO L481 AbstractCegarLoop]: Abstraction has 6395 states and 20799 transitions. [2020-10-16 12:26:41,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 20799 transitions. [2020-10-16 12:26:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:26:41,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:41,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:41,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 12:26:41,487 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591663, now seen corresponding path program 1 times [2020-10-16 12:26:41,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:41,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889395695] [2020-10-16 12:26:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:41,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889395695] [2020-10-16 12:26:41,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504983433] [2020-10-16 12:26:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:26:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:41,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:41,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 12:26:41,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [340742244] [2020-10-16 12:26:41,635 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:41,639 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:41,643 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-16 12:26:41,643 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:41,652 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:41,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:26:41,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:41,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:26:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:41,654 INFO L87 Difference]: Start difference. First operand 6395 states and 20799 transitions. Second operand 5 states. [2020-10-16 12:26:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:41,716 INFO L93 Difference]: Finished difference Result 6391 states and 20787 transitions. [2020-10-16 12:26:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:26:41,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 12:26:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:41,737 INFO L225 Difference]: With dead ends: 6391 [2020-10-16 12:26:41,738 INFO L226 Difference]: Without dead ends: 6391 [2020-10-16 12:26:41,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2020-10-16 12:26:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6391. [2020-10-16 12:26:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6391 states. [2020-10-16 12:26:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 20787 transitions. [2020-10-16 12:26:41,912 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 20787 transitions. Word has length 23 [2020-10-16 12:26:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:41,913 INFO L481 AbstractCegarLoop]: Abstraction has 6391 states and 20787 transitions. [2020-10-16 12:26:41,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:26:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 20787 transitions. [2020-10-16 12:26:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:26:41,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:41,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:42,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 12:26:42,130 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1656058557, now seen corresponding path program 1 times [2020-10-16 12:26:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:42,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071564843] [2020-10-16 12:26:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:42,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071564843] [2020-10-16 12:26:42,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052146371] [2020-10-16 12:26:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:26:42,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:42,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:42,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 12:26:42,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2064335172] [2020-10-16 12:26:42,410 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:42,417 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:42,426 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-16 12:26:42,426 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:42,440 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:42,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:26:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:42,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:26:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:42,442 INFO L87 Difference]: Start difference. First operand 6391 states and 20787 transitions. Second operand 6 states. [2020-10-16 12:26:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:42,525 INFO L93 Difference]: Finished difference Result 6383 states and 20759 transitions. [2020-10-16 12:26:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:26:42,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 12:26:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:42,547 INFO L225 Difference]: With dead ends: 6383 [2020-10-16 12:26:42,547 INFO L226 Difference]: Without dead ends: 6383 [2020-10-16 12:26:42,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-10-16 12:26:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6383. [2020-10-16 12:26:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6383 states. [2020-10-16 12:26:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 20759 transitions. [2020-10-16 12:26:42,724 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 20759 transitions. Word has length 29 [2020-10-16 12:26:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:42,724 INFO L481 AbstractCegarLoop]: Abstraction has 6383 states and 20759 transitions. [2020-10-16 12:26:42,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:26:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 20759 transitions. [2020-10-16 12:26:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:26:42,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:42,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:42,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:42,941 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1120181460, now seen corresponding path program 1 times [2020-10-16 12:26:42,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:42,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334465302] [2020-10-16 12:26:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:43,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334465302] [2020-10-16 12:26:43,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426545393] [2020-10-16 12:26:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:26:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:43,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:43,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 12:26:43,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [431666732] [2020-10-16 12:26:43,155 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:43,162 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:43,172 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-16 12:26:43,172 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:43,184 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:43,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:26:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:26:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:26:43,185 INFO L87 Difference]: Start difference. First operand 6383 states and 20759 transitions. Second operand 7 states. [2020-10-16 12:26:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:43,259 INFO L93 Difference]: Finished difference Result 6367 states and 20695 transitions. [2020-10-16 12:26:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:26:43,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-16 12:26:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:43,285 INFO L225 Difference]: With dead ends: 6367 [2020-10-16 12:26:43,285 INFO L226 Difference]: Without dead ends: 6367 [2020-10-16 12:26:43,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:26:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-10-16 12:26:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2020-10-16 12:26:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-10-16 12:26:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 20695 transitions. [2020-10-16 12:26:43,475 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 20695 transitions. Word has length 35 [2020-10-16 12:26:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:43,475 INFO L481 AbstractCegarLoop]: Abstraction has 6367 states and 20695 transitions. [2020-10-16 12:26:43,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:26:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 20695 transitions. [2020-10-16 12:26:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 12:26:43,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:43,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:43,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:43,698 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash -531586812, now seen corresponding path program 1 times [2020-10-16 12:26:43,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:43,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113277660] [2020-10-16 12:26:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:43,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113277660] [2020-10-16 12:26:43,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782444805] [2020-10-16 12:26:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:43,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:26:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:44,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:44,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 12:26:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [301424352] [2020-10-16 12:26:44,072 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:44,082 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:44,099 INFO L258 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-10-16 12:26:44,099 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:44,110 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:44,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:26:44,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:26:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:26:44,111 INFO L87 Difference]: Start difference. First operand 6367 states and 20695 transitions. Second operand 8 states. [2020-10-16 12:26:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:44,200 INFO L93 Difference]: Finished difference Result 6335 states and 20551 transitions. [2020-10-16 12:26:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:26:44,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-16 12:26:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:44,224 INFO L225 Difference]: With dead ends: 6335 [2020-10-16 12:26:44,224 INFO L226 Difference]: Without dead ends: 6335 [2020-10-16 12:26:44,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:26:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2020-10-16 12:26:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 6335. [2020-10-16 12:26:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-10-16 12:26:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 20551 transitions. [2020-10-16 12:26:44,414 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 20551 transitions. Word has length 41 [2020-10-16 12:26:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:44,415 INFO L481 AbstractCegarLoop]: Abstraction has 6335 states and 20551 transitions. [2020-10-16 12:26:44,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:26:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 20551 transitions. [2020-10-16 12:26:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 12:26:44,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:44,418 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:44,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 12:26:44,631 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash -431266190, now seen corresponding path program 1 times [2020-10-16 12:26:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:44,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782839480] [2020-10-16 12:26:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:44,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:26:44,694 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:26:44,705 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:26:44,705 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:26:44,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-16 12:26:44,706 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:26:44,706 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:26:44,707 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-16 12:26:44,714 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,714 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,715 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,716 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,716 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,716 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,717 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,718 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,719 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,720 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,720 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,720 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,720 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,720 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,720 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,721 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,721 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,721 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,721 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,721 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,722 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,723 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,723 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,723 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,723 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,725 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,725 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,725 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,725 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,727 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,727 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,727 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,727 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,728 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,728 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,728 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,728 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,729 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,729 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,730 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,730 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,731 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,731 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,731 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,731 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:26:44,736 INFO L149 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2020-10-16 12:26:44,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:26:44,737 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:26:44,737 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:26:44,737 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:26:44,737 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:26:44,737 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:26:44,737 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:26:44,737 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:26:44,738 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:26:44,739 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:26:44,739 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 120 transitions, 338 flow [2020-10-16 12:26:44,739 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 120 transitions, 338 flow [2020-10-16 12:26:44,739 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-16 12:26:45,828 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-16 12:26:45,829 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 12:26:45,847 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-10-16 12:26:45,957 INFO L117 LiptonReduction]: Number of co-enabled transitions 3864 [2020-10-16 12:26:47,799 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 12:26:48,200 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-16 12:26:48,307 INFO L132 LiptonReduction]: Checked pairs total: 7691 [2020-10-16 12:26:48,307 INFO L134 LiptonReduction]: Total number of compositions: 101 [2020-10-16 12:26:48,307 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 37 transitions, 172 flow [2020-10-16 12:26:49,431 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18897 states. [2020-10-16 12:26:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18897 states. [2020-10-16 12:26:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:26:49,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:49,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:26:49,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 47630986, now seen corresponding path program 1 times [2020-10-16 12:26:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:49,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156170915] [2020-10-16 12:26:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:26:49,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156170915] [2020-10-16 12:26:49,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:49,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:26:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1021602156] [2020-10-16 12:26:49,454 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:49,454 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:49,455 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:26:49,455 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:49,455 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:49,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:26:49,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:49,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:26:49,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:49,456 INFO L87 Difference]: Start difference. First operand 18897 states. Second operand 3 states. [2020-10-16 12:26:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:49,602 INFO L93 Difference]: Finished difference Result 18897 states and 69116 transitions. [2020-10-16 12:26:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:26:49,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:26:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:49,658 INFO L225 Difference]: With dead ends: 18897 [2020-10-16 12:26:49,659 INFO L226 Difference]: Without dead ends: 16708 [2020-10-16 12:26:49,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:26:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2020-10-16 12:26:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16708. [2020-10-16 12:26:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16708 states. [2020-10-16 12:26:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 61824 transitions. [2020-10-16 12:26:51,050 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 61824 transitions. Word has length 4 [2020-10-16 12:26:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:51,051 INFO L481 AbstractCegarLoop]: Abstraction has 16708 states and 61824 transitions. [2020-10-16 12:26:51,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:26:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 61824 transitions. [2020-10-16 12:26:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:26:51,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:51,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:51,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-16 12:26:51,052 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1252214789, now seen corresponding path program 1 times [2020-10-16 12:26:51,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:51,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163717228] [2020-10-16 12:26:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:26:51,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163717228] [2020-10-16 12:26:51,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:26:51,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:26:51,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [154057039] [2020-10-16 12:26:51,090 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:51,092 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:51,093 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:26:51,093 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:51,094 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:51,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:51,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:51,095 INFO L87 Difference]: Start difference. First operand 16708 states and 61824 transitions. Second operand 4 states. [2020-10-16 12:26:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:51,235 INFO L93 Difference]: Finished difference Result 19531 states and 70840 transitions. [2020-10-16 12:26:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:51,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:26:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:51,292 INFO L225 Difference]: With dead ends: 19531 [2020-10-16 12:26:51,292 INFO L226 Difference]: Without dead ends: 19531 [2020-10-16 12:26:51,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:26:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2020-10-16 12:26:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 18637. [2020-10-16 12:26:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18637 states. [2020-10-16 12:26:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18637 states to 18637 states and 67705 transitions. [2020-10-16 12:26:52,205 INFO L78 Accepts]: Start accepts. Automaton has 18637 states and 67705 transitions. Word has length 10 [2020-10-16 12:26:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:52,205 INFO L481 AbstractCegarLoop]: Abstraction has 18637 states and 67705 transitions. [2020-10-16 12:26:52,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 18637 states and 67705 transitions. [2020-10-16 12:26:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:26:52,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:52,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:52,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-16 12:26:52,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1432879296, now seen corresponding path program 1 times [2020-10-16 12:26:52,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:52,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789673975] [2020-10-16 12:26:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:52,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789673975] [2020-10-16 12:26:52,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112392827] [2020-10-16 12:26:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:52,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:26:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:52,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:52,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:26:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [745678601] [2020-10-16 12:26:52,328 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:52,330 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:52,333 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:26:52,333 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:52,352 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:52,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:26:52,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:52,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:26:52,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:52,353 INFO L87 Difference]: Start difference. First operand 18637 states and 67705 transitions. Second operand 4 states. [2020-10-16 12:26:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:52,469 INFO L93 Difference]: Finished difference Result 18635 states and 67700 transitions. [2020-10-16 12:26:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:26:52,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:26:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:52,523 INFO L225 Difference]: With dead ends: 18635 [2020-10-16 12:26:52,524 INFO L226 Difference]: Without dead ends: 18635 [2020-10-16 12:26:52,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:26:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2020-10-16 12:26:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18635. [2020-10-16 12:26:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18635 states. [2020-10-16 12:26:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18635 states to 18635 states and 67700 transitions. [2020-10-16 12:26:53,037 INFO L78 Accepts]: Start accepts. Automaton has 18635 states and 67700 transitions. Word has length 17 [2020-10-16 12:26:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:53,037 INFO L481 AbstractCegarLoop]: Abstraction has 18635 states and 67700 transitions. [2020-10-16 12:26:53,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:26:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 18635 states and 67700 transitions. [2020-10-16 12:26:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:26:53,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:53,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:53,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:53,239 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash -619616742, now seen corresponding path program 1 times [2020-10-16 12:26:53,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:53,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911774032] [2020-10-16 12:26:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:53,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911774032] [2020-10-16 12:26:53,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209276199] [2020-10-16 12:26:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:26:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:53,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:53,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 12:26:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [795248840] [2020-10-16 12:26:53,444 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:53,448 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:53,454 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-16 12:26:53,454 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:54,373 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:54,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:26:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:26:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:54,374 INFO L87 Difference]: Start difference. First operand 18635 states and 67700 transitions. Second operand 5 states. [2020-10-16 12:26:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:54,504 INFO L93 Difference]: Finished difference Result 18631 states and 67688 transitions. [2020-10-16 12:26:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:26:54,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 12:26:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:54,556 INFO L225 Difference]: With dead ends: 18631 [2020-10-16 12:26:54,556 INFO L226 Difference]: Without dead ends: 18631 [2020-10-16 12:26:54,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:26:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18631 states. [2020-10-16 12:26:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18631 to 18631. [2020-10-16 12:26:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-10-16 12:26:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 67688 transitions. [2020-10-16 12:26:55,064 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 67688 transitions. Word has length 23 [2020-10-16 12:26:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:55,064 INFO L481 AbstractCegarLoop]: Abstraction has 18631 states and 67688 transitions. [2020-10-16 12:26:55,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:26:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 67688 transitions. [2020-10-16 12:26:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:26:55,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:55,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:55,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 12:26:55,281 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash 872252755, now seen corresponding path program 1 times [2020-10-16 12:26:55,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:55,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465908538] [2020-10-16 12:26:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465908538] [2020-10-16 12:26:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537666703] [2020-10-16 12:26:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:26:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:55,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:26:55,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:55,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:55,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 12:26:55,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [265964539] [2020-10-16 12:26:55,458 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:55,463 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:55,470 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-16 12:26:55,470 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:55,475 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:55,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:26:55,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:55,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:26:55,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:55,476 INFO L87 Difference]: Start difference. First operand 18631 states and 67688 transitions. Second operand 6 states. [2020-10-16 12:26:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:55,616 INFO L93 Difference]: Finished difference Result 18623 states and 67660 transitions. [2020-10-16 12:26:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:26:55,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 12:26:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:55,664 INFO L225 Difference]: With dead ends: 18623 [2020-10-16 12:26:55,664 INFO L226 Difference]: Without dead ends: 18623 [2020-10-16 12:26:55,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:26:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18623 states. [2020-10-16 12:26:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18623 to 18623. [2020-10-16 12:26:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-10-16 12:26:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 67660 transitions. [2020-10-16 12:26:56,294 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 67660 transitions. Word has length 29 [2020-10-16 12:26:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:56,294 INFO L481 AbstractCegarLoop]: Abstraction has 18623 states and 67660 transitions. [2020-10-16 12:26:56,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:26:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 67660 transitions. [2020-10-16 12:26:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:26:56,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:56,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:56,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 12:26:56,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash -603243733, now seen corresponding path program 1 times [2020-10-16 12:26:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:56,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363577932] [2020-10-16 12:26:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363577932] [2020-10-16 12:26:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710700187] [2020-10-16 12:26:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:26:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 12:26:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [848940539] [2020-10-16 12:26:56,709 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:56,716 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:56,727 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-16 12:26:56,728 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:56,732 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:56,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:26:56,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:26:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:26:56,733 INFO L87 Difference]: Start difference. First operand 18623 states and 67660 transitions. Second operand 7 states. [2020-10-16 12:26:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:56,870 INFO L93 Difference]: Finished difference Result 18607 states and 67596 transitions. [2020-10-16 12:26:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:26:56,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-16 12:26:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:56,915 INFO L225 Difference]: With dead ends: 18607 [2020-10-16 12:26:56,915 INFO L226 Difference]: Without dead ends: 18607 [2020-10-16 12:26:56,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:26:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2020-10-16 12:26:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 18607. [2020-10-16 12:26:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18607 states. [2020-10-16 12:26:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 67596 transitions. [2020-10-16 12:26:57,617 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 67596 transitions. Word has length 35 [2020-10-16 12:26:57,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:57,617 INFO L481 AbstractCegarLoop]: Abstraction has 18607 states and 67596 transitions. [2020-10-16 12:26:57,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:26:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 67596 transitions. [2020-10-16 12:26:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 12:26:57,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:57,622 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:57,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 12:26:57,837 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash -131017630, now seen corresponding path program 1 times [2020-10-16 12:26:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:57,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854831984] [2020-10-16 12:26:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:57,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854831984] [2020-10-16 12:26:57,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290410705] [2020-10-16 12:26:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:26:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:58,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:58,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 12:26:58,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [489716426] [2020-10-16 12:26:58,074 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:58,084 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:58,102 INFO L258 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-10-16 12:26:58,102 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:58,108 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:58,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:26:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:26:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:26:58,109 INFO L87 Difference]: Start difference. First operand 18607 states and 67596 transitions. Second operand 8 states. [2020-10-16 12:26:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:58,254 INFO L93 Difference]: Finished difference Result 18575 states and 67452 transitions. [2020-10-16 12:26:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:26:58,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-16 12:26:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:58,298 INFO L225 Difference]: With dead ends: 18575 [2020-10-16 12:26:58,298 INFO L226 Difference]: Without dead ends: 18575 [2020-10-16 12:26:58,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:26:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-10-16 12:26:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18575. [2020-10-16 12:26:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18575 states. [2020-10-16 12:26:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 67452 transitions. [2020-10-16 12:26:58,687 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 67452 transitions. Word has length 41 [2020-10-16 12:26:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:58,687 INFO L481 AbstractCegarLoop]: Abstraction has 18575 states and 67452 transitions. [2020-10-16 12:26:58,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:26:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 67452 transitions. [2020-10-16 12:26:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 12:26:58,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:58,693 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:26:58,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 12:26:58,894 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:26:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:26:58,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1557656136, now seen corresponding path program 1 times [2020-10-16 12:26:58,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:26:58,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126181868] [2020-10-16 12:26:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:26:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:58,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126181868] [2020-10-16 12:26:58,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537659689] [2020-10-16 12:26:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:26:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:26:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:26:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:26:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:26:59,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:26:59,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:26:59,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [98305791] [2020-10-16 12:26:59,150 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:26:59,162 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:26:59,179 INFO L258 McrAutomatonBuilder]: Finished intersection with 50 states and 51 transitions. [2020-10-16 12:26:59,179 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:26:59,183 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:26:59,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:26:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:26:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:26:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:26:59,184 INFO L87 Difference]: Start difference. First operand 18575 states and 67452 transitions. Second operand 9 states. [2020-10-16 12:26:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:26:59,489 INFO L93 Difference]: Finished difference Result 18511 states and 67132 transitions. [2020-10-16 12:26:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 12:26:59,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-16 12:26:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:26:59,534 INFO L225 Difference]: With dead ends: 18511 [2020-10-16 12:26:59,534 INFO L226 Difference]: Without dead ends: 18511 [2020-10-16 12:26:59,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:26:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18511 states. [2020-10-16 12:26:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18511 to 18511. [2020-10-16 12:26:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2020-10-16 12:26:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 67132 transitions. [2020-10-16 12:26:59,910 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 67132 transitions. Word has length 47 [2020-10-16 12:26:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:26:59,910 INFO L481 AbstractCegarLoop]: Abstraction has 18511 states and 67132 transitions. [2020-10-16 12:26:59,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:26:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 67132 transitions. [2020-10-16 12:26:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 12:26:59,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:26:59,914 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:00,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:00,115 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:00,115 INFO L82 PathProgramCache]: Analyzing trace with hash 230242214, now seen corresponding path program 1 times [2020-10-16 12:27:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:00,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205105213] [2020-10-16 12:27:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:27:00,141 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:27:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:27:00,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:27:00,180 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:27:00,180 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:27:00,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-16 12:27:00,180 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:27:00,181 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:27:00,181 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-16 12:27:00,192 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,192 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,192 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,192 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,192 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,194 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,194 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,194 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,194 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,194 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,194 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,195 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,196 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,197 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,198 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,199 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,199 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,200 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,200 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,202 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,202 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,202 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,202 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,203 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,203 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,204 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,204 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,205 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,205 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,206 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,206 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,207 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,208 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,209 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,209 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,210 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,211 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,212 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,212 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:00,219 INFO L149 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2020-10-16 12:27:00,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:27:00,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:27:00,220 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:27:00,220 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:27:00,220 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:27:00,220 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:27:00,220 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:27:00,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:27:00,221 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:27:00,222 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:27:00,222 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 126 transitions, 372 flow [2020-10-16 12:27:00,223 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 126 transitions, 372 flow [2020-10-16 12:27:00,223 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-16 12:27:01,873 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-16 12:27:01,873 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 12:27:01,913 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-10-16 12:27:02,081 INFO L117 LiptonReduction]: Number of co-enabled transitions 4640 [2020-10-16 12:27:03,953 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-16 12:27:04,056 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-16 12:27:04,499 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-16 12:27:04,613 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-16 12:27:04,627 INFO L132 LiptonReduction]: Checked pairs total: 9733 [2020-10-16 12:27:04,628 INFO L134 LiptonReduction]: Total number of compositions: 104 [2020-10-16 12:27:04,628 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 40 transitions, 200 flow [2020-10-16 12:27:11,472 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 55297 states. [2020-10-16 12:27:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 55297 states. [2020-10-16 12:27:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:27:11,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:11,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:27:11,472 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash 54894463, now seen corresponding path program 1 times [2020-10-16 12:27:11,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:11,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265799404] [2020-10-16 12:27:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:27:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265799404] [2020-10-16 12:27:11,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:27:11,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:27:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [232271625] [2020-10-16 12:27:11,490 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:11,490 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:11,490 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:27:11,490 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:11,490 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:11,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:27:11,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:27:11,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:27:11,491 INFO L87 Difference]: Start difference. First operand 55297 states. Second operand 3 states. [2020-10-16 12:27:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:11,784 INFO L93 Difference]: Finished difference Result 55297 states and 222749 transitions. [2020-10-16 12:27:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:27:11,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:27:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:11,934 INFO L225 Difference]: With dead ends: 55297 [2020-10-16 12:27:11,934 INFO L226 Difference]: Without dead ends: 48734 [2020-10-16 12:27:11,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:27:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48734 states. [2020-10-16 12:27:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48734 to 48734. [2020-10-16 12:27:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48734 states. [2020-10-16 12:27:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48734 states to 48734 states and 198690 transitions. [2020-10-16 12:27:15,281 INFO L78 Accepts]: Start accepts. Automaton has 48734 states and 198690 transitions. Word has length 4 [2020-10-16 12:27:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:15,281 INFO L481 AbstractCegarLoop]: Abstraction has 48734 states and 198690 transitions. [2020-10-16 12:27:15,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:27:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 48734 states and 198690 transitions. [2020-10-16 12:27:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:27:15,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:15,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:15,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-16 12:27:15,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1411257051, now seen corresponding path program 1 times [2020-10-16 12:27:15,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:15,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615362425] [2020-10-16 12:27:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:27:15,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615362425] [2020-10-16 12:27:15,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:27:15,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:27:15,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2099122433] [2020-10-16 12:27:15,309 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:15,309 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:15,310 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:27:15,310 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:15,310 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:15,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:27:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:27:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:27:15,311 INFO L87 Difference]: Start difference. First operand 48734 states and 198690 transitions. Second operand 4 states. [2020-10-16 12:27:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:15,646 INFO L93 Difference]: Finished difference Result 56827 states and 227865 transitions. [2020-10-16 12:27:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:27:15,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:27:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:15,797 INFO L225 Difference]: With dead ends: 56827 [2020-10-16 12:27:15,797 INFO L226 Difference]: Without dead ends: 56827 [2020-10-16 12:27:15,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:27:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2020-10-16 12:27:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 54781. [2020-10-16 12:27:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54781 states. [2020-10-16 12:27:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54781 states to 54781 states and 219674 transitions. [2020-10-16 12:27:18,087 INFO L78 Accepts]: Start accepts. Automaton has 54781 states and 219674 transitions. Word has length 10 [2020-10-16 12:27:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:18,087 INFO L481 AbstractCegarLoop]: Abstraction has 54781 states and 219674 transitions. [2020-10-16 12:27:18,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:27:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 54781 states and 219674 transitions. [2020-10-16 12:27:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:27:18,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:18,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:18,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-16 12:27:18,088 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1775097937, now seen corresponding path program 1 times [2020-10-16 12:27:18,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:18,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863576140] [2020-10-16 12:27:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:18,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863576140] [2020-10-16 12:27:18,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998925789] [2020-10-16 12:27:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:27:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:18,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:18,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:27:18,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [287047759] [2020-10-16 12:27:18,220 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:18,222 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:18,225 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:27:18,225 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:18,241 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:18,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:27:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:27:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:27:18,242 INFO L87 Difference]: Start difference. First operand 54781 states and 219674 transitions. Second operand 4 states. [2020-10-16 12:27:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:20,497 INFO L93 Difference]: Finished difference Result 54779 states and 219669 transitions. [2020-10-16 12:27:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:27:20,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-16 12:27:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:20,663 INFO L225 Difference]: With dead ends: 54779 [2020-10-16 12:27:20,664 INFO L226 Difference]: Without dead ends: 54779 [2020-10-16 12:27:20,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:27:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54779 states. [2020-10-16 12:27:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54779 to 54779. [2020-10-16 12:27:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54779 states. [2020-10-16 12:27:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54779 states to 54779 states and 219669 transitions. [2020-10-16 12:27:22,814 INFO L78 Accepts]: Start accepts. Automaton has 54779 states and 219669 transitions. Word has length 17 [2020-10-16 12:27:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:22,814 INFO L481 AbstractCegarLoop]: Abstraction has 54779 states and 219669 transitions. [2020-10-16 12:27:22,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:27:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 54779 states and 219669 transitions. [2020-10-16 12:27:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:27:22,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:22,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:23,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:23,022 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash 911691700, now seen corresponding path program 1 times [2020-10-16 12:27:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:23,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961146346] [2020-10-16 12:27:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:23,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961146346] [2020-10-16 12:27:23,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728791006] [2020-10-16 12:27:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:23,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:27:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:23,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:23,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 12:27:23,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [117049120] [2020-10-16 12:27:23,187 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:23,196 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:23,206 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-16 12:27:23,206 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:23,221 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:23,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:27:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:27:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:27:23,223 INFO L87 Difference]: Start difference. First operand 54779 states and 219669 transitions. Second operand 5 states. [2020-10-16 12:27:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:23,513 INFO L93 Difference]: Finished difference Result 54775 states and 219657 transitions. [2020-10-16 12:27:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:27:23,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 12:27:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:23,672 INFO L225 Difference]: With dead ends: 54775 [2020-10-16 12:27:23,672 INFO L226 Difference]: Without dead ends: 54775 [2020-10-16 12:27:23,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:27:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54775 states. [2020-10-16 12:27:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54775 to 54775. [2020-10-16 12:27:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54775 states. [2020-10-16 12:27:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54775 states to 54775 states and 219657 transitions. [2020-10-16 12:27:28,068 INFO L78 Accepts]: Start accepts. Automaton has 54775 states and 219657 transitions. Word has length 23 [2020-10-16 12:27:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:28,068 INFO L481 AbstractCegarLoop]: Abstraction has 54775 states and 219657 transitions. [2020-10-16 12:27:28,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:27:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 54775 states and 219657 transitions. [2020-10-16 12:27:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:27:28,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:28,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:28,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 12:27:28,277 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1882146136, now seen corresponding path program 1 times [2020-10-16 12:27:28,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:28,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759425406] [2020-10-16 12:27:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:28,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759425406] [2020-10-16 12:27:28,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696139413] [2020-10-16 12:27:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:27:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:28,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:28,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 12:27:28,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1107953655] [2020-10-16 12:27:28,441 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:28,446 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:28,454 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-16 12:27:28,454 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:28,463 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:28,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:27:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:27:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:27:28,464 INFO L87 Difference]: Start difference. First operand 54775 states and 219657 transitions. Second operand 6 states. [2020-10-16 12:27:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:28,767 INFO L93 Difference]: Finished difference Result 54767 states and 219629 transitions. [2020-10-16 12:27:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:27:28,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 12:27:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:28,927 INFO L225 Difference]: With dead ends: 54767 [2020-10-16 12:27:28,927 INFO L226 Difference]: Without dead ends: 54767 [2020-10-16 12:27:28,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:27:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54767 states. [2020-10-16 12:27:30,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54767 to 54767. [2020-10-16 12:27:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54767 states. [2020-10-16 12:27:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54767 states to 54767 states and 219629 transitions. [2020-10-16 12:27:31,093 INFO L78 Accepts]: Start accepts. Automaton has 54767 states and 219629 transitions. Word has length 29 [2020-10-16 12:27:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:31,093 INFO L481 AbstractCegarLoop]: Abstraction has 54767 states and 219629 transitions. [2020-10-16 12:27:31,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:27:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54767 states and 219629 transitions. [2020-10-16 12:27:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:27:31,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:31,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:31,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:31,303 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash -290777765, now seen corresponding path program 1 times [2020-10-16 12:27:31,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:31,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178959373] [2020-10-16 12:27:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:31,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178959373] [2020-10-16 12:27:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521976062] [2020-10-16 12:27:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:31,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 12:27:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:31,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:31,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 12:27:31,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [506610996] [2020-10-16 12:27:31,511 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:31,518 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:31,529 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-16 12:27:31,529 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:31,538 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:31,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:27:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:27:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:27:31,539 INFO L87 Difference]: Start difference. First operand 54767 states and 219629 transitions. Second operand 7 states. [2020-10-16 12:27:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:31,840 INFO L93 Difference]: Finished difference Result 54751 states and 219565 transitions. [2020-10-16 12:27:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:27:31,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-16 12:27:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:31,976 INFO L225 Difference]: With dead ends: 54751 [2020-10-16 12:27:31,976 INFO L226 Difference]: Without dead ends: 54751 [2020-10-16 12:27:31,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 12:27:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2020-10-16 12:27:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 54751. [2020-10-16 12:27:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54751 states. [2020-10-16 12:27:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54751 states to 54751 states and 219565 transitions. [2020-10-16 12:27:36,434 INFO L78 Accepts]: Start accepts. Automaton has 54751 states and 219565 transitions. Word has length 35 [2020-10-16 12:27:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:36,435 INFO L481 AbstractCegarLoop]: Abstraction has 54751 states and 219565 transitions. [2020-10-16 12:27:36,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:27:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54751 states and 219565 transitions. [2020-10-16 12:27:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 12:27:36,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:36,438 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:36,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 12:27:36,652 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 460274813, now seen corresponding path program 1 times [2020-10-16 12:27:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:36,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852736255] [2020-10-16 12:27:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:36,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852736255] [2020-10-16 12:27:36,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369021546] [2020-10-16 12:27:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 12:27:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:36,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:36,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 12:27:36,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [681157112] [2020-10-16 12:27:36,889 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:36,897 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:36,913 INFO L258 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-10-16 12:27:36,914 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:36,923 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:36,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:27:36,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:36,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:27:36,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:27:36,924 INFO L87 Difference]: Start difference. First operand 54751 states and 219565 transitions. Second operand 8 states. [2020-10-16 12:27:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:37,265 INFO L93 Difference]: Finished difference Result 54719 states and 219421 transitions. [2020-10-16 12:27:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 12:27:37,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-16 12:27:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:37,405 INFO L225 Difference]: With dead ends: 54719 [2020-10-16 12:27:37,406 INFO L226 Difference]: Without dead ends: 54719 [2020-10-16 12:27:37,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-10-16 12:27:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54719 states. [2020-10-16 12:27:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54719 to 54719. [2020-10-16 12:27:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54719 states. [2020-10-16 12:27:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54719 states to 54719 states and 219421 transitions. [2020-10-16 12:27:39,827 INFO L78 Accepts]: Start accepts. Automaton has 54719 states and 219421 transitions. Word has length 41 [2020-10-16 12:27:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:39,828 INFO L481 AbstractCegarLoop]: Abstraction has 54719 states and 219421 transitions. [2020-10-16 12:27:39,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:27:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 54719 states and 219421 transitions. [2020-10-16 12:27:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 12:27:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:39,834 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:40,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 12:27:40,049 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash -964712578, now seen corresponding path program 1 times [2020-10-16 12:27:40,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:40,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774443979] [2020-10-16 12:27:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:40,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774443979] [2020-10-16 12:27:40,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269325929] [2020-10-16 12:27:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:27:40,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:40,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:40,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:27:40,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1772580983] [2020-10-16 12:27:40,340 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:40,348 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:40,367 INFO L258 McrAutomatonBuilder]: Finished intersection with 50 states and 51 transitions. [2020-10-16 12:27:40,367 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:40,383 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:40,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 12:27:40,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 12:27:40,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:27:40,384 INFO L87 Difference]: Start difference. First operand 54719 states and 219421 transitions. Second operand 9 states. [2020-10-16 12:27:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:40,736 INFO L93 Difference]: Finished difference Result 54655 states and 219101 transitions. [2020-10-16 12:27:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 12:27:40,737 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-16 12:27:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:40,909 INFO L225 Difference]: With dead ends: 54655 [2020-10-16 12:27:40,909 INFO L226 Difference]: Without dead ends: 54655 [2020-10-16 12:27:40,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-10-16 12:27:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54655 states. [2020-10-16 12:27:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54655 to 54655. [2020-10-16 12:27:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54655 states. [2020-10-16 12:27:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54655 states to 54655 states and 219101 transitions. [2020-10-16 12:27:45,448 INFO L78 Accepts]: Start accepts. Automaton has 54655 states and 219101 transitions. Word has length 47 [2020-10-16 12:27:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:45,448 INFO L481 AbstractCegarLoop]: Abstraction has 54655 states and 219101 transitions. [2020-10-16 12:27:45,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 12:27:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54655 states and 219101 transitions. [2020-10-16 12:27:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-16 12:27:45,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:45,460 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:45,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 12:27:45,672 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1558950686, now seen corresponding path program 1 times [2020-10-16 12:27:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:45,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839093306] [2020-10-16 12:27:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:45,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839093306] [2020-10-16 12:27:45,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977880698] [2020-10-16 12:27:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:27:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:27:45,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:27:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:27:45,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:27:45,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-16 12:27:45,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1560668908] [2020-10-16 12:27:45,981 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:27:45,997 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:27:46,024 INFO L258 McrAutomatonBuilder]: Finished intersection with 56 states and 57 transitions. [2020-10-16 12:27:46,025 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:27:46,033 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:27:46,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 12:27:46,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:27:46,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 12:27:46,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:27:46,034 INFO L87 Difference]: Start difference. First operand 54655 states and 219101 transitions. Second operand 10 states. [2020-10-16 12:27:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:27:46,420 INFO L93 Difference]: Finished difference Result 54527 states and 218397 transitions. [2020-10-16 12:27:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 12:27:46,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-16 12:27:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:27:46,606 INFO L225 Difference]: With dead ends: 54527 [2020-10-16 12:27:46,606 INFO L226 Difference]: Without dead ends: 54527 [2020-10-16 12:27:46,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:27:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54527 states. [2020-10-16 12:27:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54527 to 54527. [2020-10-16 12:27:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54527 states. [2020-10-16 12:27:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54527 states to 54527 states and 218397 transitions. [2020-10-16 12:27:48,998 INFO L78 Accepts]: Start accepts. Automaton has 54527 states and 218397 transitions. Word has length 53 [2020-10-16 12:27:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:27:48,998 INFO L481 AbstractCegarLoop]: Abstraction has 54527 states and 218397 transitions. [2020-10-16 12:27:48,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 12:27:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54527 states and 218397 transitions. [2020-10-16 12:27:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-16 12:27:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:27:49,004 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:27:49,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:27:49,206 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:27:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:27:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1378182391, now seen corresponding path program 1 times [2020-10-16 12:27:49,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:27:49,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715924379] [2020-10-16 12:27:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:27:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:27:49,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:27:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:27:49,249 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:27:49,259 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:27:49,260 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:27:49,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-16 12:27:49,260 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:27:49,261 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:27:49,261 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-16 12:27:49,271 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,272 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,272 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,272 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,272 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,272 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,273 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,273 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,273 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,273 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,273 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,273 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,275 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,276 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,276 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,276 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,276 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,276 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,276 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,277 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,278 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,279 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,279 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,279 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,279 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,279 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,279 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,280 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,280 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,280 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,280 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,281 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,282 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,282 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,282 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,283 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,283 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,283 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,283 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,285 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,285 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,285 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,285 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,286 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,287 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,287 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,287 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,288 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,288 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,288 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,289 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,290 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,290 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,290 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,290 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,292 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,292 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,292 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,292 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,293 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,293 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,294 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,294 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:27:49,304 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2020-10-16 12:27:49,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 12:27:49,305 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:27:49,305 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:27:49,305 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:27:49,305 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 12:27:49,305 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:27:49,306 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:27:49,306 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:27:49,306 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:27:49,307 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:27:49,307 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 408 flow [2020-10-16 12:27:49,307 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 132 transitions, 408 flow [2020-10-16 12:27:49,308 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-16 12:27:53,295 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-16 12:27:53,295 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 12:27:53,377 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-10-16 12:27:53,891 INFO L117 LiptonReduction]: Number of co-enabled transitions 5472 [2020-10-16 12:27:55,668 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-16 12:27:56,033 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-16 12:27:56,343 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-16 12:27:56,435 INFO L132 LiptonReduction]: Checked pairs total: 11917 [2020-10-16 12:27:56,436 INFO L134 LiptonReduction]: Total number of compositions: 104 [2020-10-16 12:27:56,436 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 43 transitions, 230 flow [2020-10-16 12:28:50,528 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 163089 states. [2020-10-16 12:28:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 163089 states. [2020-10-16 12:28:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 12:28:50,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:28:50,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 12:28:50,529 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:28:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:28:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 62348159, now seen corresponding path program 1 times [2020-10-16 12:28:50,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:28:50,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018897194] [2020-10-16 12:28:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:28:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:28:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:28:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018897194] [2020-10-16 12:28:50,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:28:50,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:28:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1474642227] [2020-10-16 12:28:50,565 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:28:50,565 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:28:50,565 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-16 12:28:50,565 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:28:50,566 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:28:50,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:28:50,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:28:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:28:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:28:50,567 INFO L87 Difference]: Start difference. First operand 163089 states. Second operand 3 states. [2020-10-16 12:28:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:28:52,496 INFO L93 Difference]: Finished difference Result 163089 states and 717318 transitions. [2020-10-16 12:28:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:28:52,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 12:28:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:28:53,200 INFO L225 Difference]: With dead ends: 163089 [2020-10-16 12:28:53,200 INFO L226 Difference]: Without dead ends: 143404 [2020-10-16 12:28:53,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:29:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143404 states. [2020-10-16 12:29:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143404 to 143404. [2020-10-16 12:29:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143404 states. [2020-10-16 12:29:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143404 states to 143404 states and 638584 transitions. [2020-10-16 12:29:07,984 INFO L78 Accepts]: Start accepts. Automaton has 143404 states and 638584 transitions. Word has length 4 [2020-10-16 12:29:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:29:07,985 INFO L481 AbstractCegarLoop]: Abstraction has 143404 states and 638584 transitions. [2020-10-16 12:29:07,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:29:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 143404 states and 638584 transitions. [2020-10-16 12:29:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 12:29:07,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:29:07,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:29:07,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-16 12:29:07,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:29:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:29:07,986 INFO L82 PathProgramCache]: Analyzing trace with hash 288657511, now seen corresponding path program 1 times [2020-10-16 12:29:07,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:29:07,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670859381] [2020-10-16 12:29:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:29:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:29:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:29:08,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670859381] [2020-10-16 12:29:08,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:29:08,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:29:08,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [766727092] [2020-10-16 12:29:08,015 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:29:08,016 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:29:08,016 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-16 12:29:08,016 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:29:08,017 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 12:29:08,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:29:08,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:29:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:29:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:29:08,018 INFO L87 Difference]: Start difference. First operand 143404 states and 638584 transitions. Second operand 4 states. [2020-10-16 12:29:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:29:11,834 INFO L93 Difference]: Finished difference Result 166667 states and 731394 transitions. [2020-10-16 12:29:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:29:11,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 12:29:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:29:12,654 INFO L225 Difference]: With dead ends: 166667 [2020-10-16 12:29:12,655 INFO L226 Difference]: Without dead ends: 166667 [2020-10-16 12:29:12,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:29:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166667 states. [2020-10-16 12:29:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166667 to 162061. [2020-10-16 12:29:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162061 states. [2020-10-16 12:29:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162061 states to 162061 states and 710659 transitions. [2020-10-16 12:29:32,842 INFO L78 Accepts]: Start accepts. Automaton has 162061 states and 710659 transitions. Word has length 10 [2020-10-16 12:29:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:29:32,842 INFO L481 AbstractCegarLoop]: Abstraction has 162061 states and 710659 transitions. [2020-10-16 12:29:32,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:29:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 162061 states and 710659 transitions. [2020-10-16 12:29:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:29:32,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:29:32,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:29:32,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-16 12:29:32,843 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:29:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:29:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash 941132211, now seen corresponding path program 1 times [2020-10-16 12:29:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:29:32,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187364769] [2020-10-16 12:29:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:29:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:29:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:29:32,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187364769] [2020-10-16 12:29:32,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392177935] [2020-10-16 12:29:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:29:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:29:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:29:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:29:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:29:33,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:29:33,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 12:29:33,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55306981] [2020-10-16 12:29:33,001 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 12:29:33,003 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 12:29:33,006 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-16 12:29:33,006 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 12:29:33,028 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1267063#(<= (+ ULTIMATE.start_main_~tid~0 16) ~SIGMA~0)] [2020-10-16 12:29:33,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:29:33,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:29:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:29:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:29:33,029 INFO L87 Difference]: Start difference. First operand 162061 states and 710659 transitions. Second operand 5 states. [2020-10-16 12:29:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:29:40,920 INFO L93 Difference]: Finished difference Result 162059 states and 710654 transitions. [2020-10-16 12:29:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:29:40,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-16 12:29:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:29:41,738 INFO L225 Difference]: With dead ends: 162059 [2020-10-16 12:29:41,738 INFO L226 Difference]: Without dead ends: 162059 [2020-10-16 12:29:41,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:29:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162059 states. [2020-10-16 12:29:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162059 to 162059. [2020-10-16 12:29:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162059 states. Received shutdown request... [2020-10-16 12:29:53,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-16 12:29:53,448 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 12:29:53,455 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 12:29:53,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:29:53 BasicIcfg [2020-10-16 12:29:53,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:29:53,458 INFO L168 Benchmark]: Toolchain (without parser) took 216267.40 ms. Allocated memory was 142.1 MB in the beginning and 3.8 GB in the end (delta: 3.7 GB). Free memory was 101.2 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. [2020-10-16 12:29:53,458 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 142.1 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 12:29:53,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 948.28 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 101.0 MB in the beginning and 124.8 MB in the end (delta: -23.8 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-10-16 12:29:53,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.62 ms. Allocated memory is still 205.5 MB. Free memory was 124.8 MB in the beginning and 122.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-16 12:29:53,459 INFO L168 Benchmark]: Boogie Preprocessor took 35.63 ms. Allocated memory is still 205.5 MB. Free memory was 122.1 MB in the beginning and 120.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 12:29:53,459 INFO L168 Benchmark]: RCFGBuilder took 517.69 ms. Allocated memory was 205.5 MB in the beginning and 235.4 MB in the end (delta: 29.9 MB). Free memory was 120.1 MB in the beginning and 206.6 MB in the end (delta: -86.5 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2020-10-16 12:29:53,460 INFO L168 Benchmark]: TraceAbstraction took 214683.43 ms. Allocated memory was 235.4 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 206.6 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. [2020-10-16 12:29:53,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 142.1 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 948.28 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 101.0 MB in the beginning and 124.8 MB in the end (delta: -23.8 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 76.62 ms. Allocated memory is still 205.5 MB. Free memory was 124.8 MB in the beginning and 122.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.63 ms. Allocated memory is still 205.5 MB. Free memory was 122.1 MB in the beginning and 120.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 517.69 ms. Allocated memory was 205.5 MB in the beginning and 235.4 MB in the end (delta: 29.9 MB). Free memory was 120.1 MB in the beginning and 206.6 MB in the end (delta: -86.5 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214683.43 ms. Allocated memory was 235.4 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 206.6 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 164 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 6 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 79 PlacesBefore, 18 PlacesAfterwards, 84 TransitionsBefore, 17 TransitionsAfterwards, 344 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 83 TotalNumberOfCompositions, 432 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 399 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 11 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 86 PlacesBefore, 24 PlacesAfterwards, 90 TransitionsBefore, 22 TransitionsAfterwards, 824 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 85 TotalNumberOfCompositions, 1197 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 639 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 93 PlacesBefore, 28 PlacesAfterwards, 96 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 90 TotalNumberOfCompositions, 2069 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 938 VarBasedMoverChecksPositive, 29 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 33 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 100 PlacesBefore, 32 PlacesAfterwards, 102 TransitionsBefore, 28 TransitionsAfterwards, 1872 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 90 TotalNumberOfCompositions, 3489 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1248 VarBasedMoverChecksPositive, 23 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 49 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 107 PlacesBefore, 36 PlacesAfterwards, 108 TransitionsBefore, 31 TransitionsAfterwards, 2480 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 93 TotalNumberOfCompositions, 4239 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1626 VarBasedMoverChecksPositive, 30 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 68 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.5s, 114 PlacesBefore, 40 PlacesAfterwards, 114 TransitionsBefore, 34 TransitionsAfterwards, 3144 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 96 TotalNumberOfCompositions, 5960 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1957 VarBasedMoverChecksPositive, 30 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 81 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.5s, 121 PlacesBefore, 44 PlacesAfterwards, 120 TransitionsBefore, 37 TransitionsAfterwards, 3864 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 101 TotalNumberOfCompositions, 7691 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2422 VarBasedMoverChecksPositive, 42 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 110 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.4s, 128 PlacesBefore, 48 PlacesAfterwards, 126 TransitionsBefore, 40 TransitionsAfterwards, 4640 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 104 TotalNumberOfCompositions, 9733 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2884 VarBasedMoverChecksPositive, 39 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 130 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 7.1s, 135 PlacesBefore, 52 PlacesAfterwards, 132 TransitionsBefore, 43 TransitionsAfterwards, 5472 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 104 TotalNumberOfCompositions, 11917 MoverChecksTotal - TimeoutResultAtElement [Line: 1092]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1092). Cancelled while ReachableStatesComputation was computing reachable states (112552 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 76 locations, 1 error locations. Started 9 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 214.3s, OverallIterations: 55, TraceHistogramMax: 9, AutomataDifference: 25.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 90.7s, HoareTripleCheckerStatistics: 1343 SDtfs, 1572 SDslu, 1989 SDs, 0 SdLazy, 1208 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1054 GetRequests, 781 SyntacticMatches, 17 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163089occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 82.2s AutomataMinimizationTime, 47 MinimizatonAttempts, 8176 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 2038 NumberOfCodeBlocks, 2038 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 1707 ConstructedInterpolants, 0 QuantifiedInterpolants, 247187 SizeOfPredicates, 29 NumberOfNonLiveVariables, 4194 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 76 InterpolantComputations, 18 PerfectInterpolantSequences, 125/1807 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