/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 04:05:59,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 04:05:59,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 04:05:59,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 04:05:59,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 04:05:59,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 04:05:59,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 04:05:59,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 04:05:59,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 04:05:59,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 04:05:59,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 04:05:59,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 04:05:59,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 04:05:59,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 04:05:59,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 04:05:59,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 04:05:59,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 04:05:59,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 04:05:59,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 04:05:59,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 04:05:59,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 04:05:59,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 04:05:59,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 04:05:59,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 04:05:59,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 04:05:59,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 04:05:59,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 04:05:59,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 04:05:59,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 04:05:59,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 04:05:59,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 04:05:59,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 04:05:59,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 04:05:59,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 04:05:59,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 04:05:59,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 04:05:59,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 04:05:59,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 04:05:59,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 04:05:59,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 04:05:59,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 04:05:59,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 04:05:59,764 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 04:05:59,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 04:05:59,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 04:05:59,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 04:05:59,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 04:05:59,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 04:05:59,765 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 04:05:59,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 04:05:59,766 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 04:05:59,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 04:05:59,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 04:05:59,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 04:05:59,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 04:05:59,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 04:05:59,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 04:05:59,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 04:05:59,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 04:05:59,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 04:05:59,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 04:05:59,769 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 04:05:59,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 04:05:59,769 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 04:05:59,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 04:05:59,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 04:05:59,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 04:05:59,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 04:05:59,969 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 04:05:59,971 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 04:05:59,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2022-01-19 04:06:00,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c47be735/29139181dad742f4b121deefb9bdfab1/FLAG979927cdc [2022-01-19 04:06:00,403 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 04:06:00,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2022-01-19 04:06:00,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c47be735/29139181dad742f4b121deefb9bdfab1/FLAG979927cdc [2022-01-19 04:06:00,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c47be735/29139181dad742f4b121deefb9bdfab1 [2022-01-19 04:06:00,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 04:06:00,792 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 04:06:00,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 04:06:00,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 04:06:00,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 04:06:00,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 04:06:00" (1/1) ... [2022-01-19 04:06:00,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66efa512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:00, skipping insertion in model container [2022-01-19 04:06:00,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 04:06:00" (1/1) ... [2022-01-19 04:06:00,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 04:06:00,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 04:06:01,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2022-01-19 04:06:01,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 04:06:01,036 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 04:06:01,059 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2022-01-19 04:06:01,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 04:06:01,080 INFO L208 MainTranslator]: Completed translation [2022-01-19 04:06:01,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01 WrapperNode [2022-01-19 04:06:01,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 04:06:01,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 04:06:01,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 04:06:01,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 04:06:01,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,105 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-01-19 04:06:01,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 04:06:01,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 04:06:01,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 04:06:01,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 04:06:01,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 04:06:01,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 04:06:01,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 04:06:01,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 04:06:01,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (1/1) ... [2022-01-19 04:06:01,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 04:06:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:01,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 04:06:01,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 04:06:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-01-19 04:06:01,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-01-19 04:06:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-01-19 04:06:01,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-01-19 04:06:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 04:06:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 04:06:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 04:06:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 04:06:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 04:06:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 04:06:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 04:06:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 04:06:01,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 04:06:01,175 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 04:06:01,261 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 04:06:01,262 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 04:06:01,385 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 04:06:01,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 04:06:01,389 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 04:06:01,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 04:06:01 BoogieIcfgContainer [2022-01-19 04:06:01,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 04:06:01,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 04:06:01,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 04:06:01,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 04:06:01,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 04:06:00" (1/3) ... [2022-01-19 04:06:01,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd67d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 04:06:01, skipping insertion in model container [2022-01-19 04:06:01,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:06:01" (2/3) ... [2022-01-19 04:06:01,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd67d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 04:06:01, skipping insertion in model container [2022-01-19 04:06:01,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 04:06:01" (3/3) ... [2022-01-19 04:06:01,403 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2022-01-19 04:06:01,407 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 04:06:01,407 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 04:06:01,407 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 04:06:01,446 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,447 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,448 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,448 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,448 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,448 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,448 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,449 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,450 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,452 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,452 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,452 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,452 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,452 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,452 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,453 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,454 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,454 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,454 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,454 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,459 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,459 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,459 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,460 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,463 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,464 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,464 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,464 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:06:01,465 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-19 04:06:01,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 04:06:01,505 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 04:06:01,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 04:06:01,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-01-19 04:06:01,535 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-19 04:06:01,536 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 04:06:01,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-01-19 04:06:01,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-01-19 04:06:01,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-01-19 04:06:01,551 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-01-19 04:06:01,552 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 04:06:01,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:01,552 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:01,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-01-19 04:06:01,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:01,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668802954] [2022-01-19 04:06:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:01,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:01,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668802954] [2022-01-19 04:06:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668802954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:01,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:06:01,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:06:01,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625030939] [2022-01-19 04:06:01,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:01,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:06:01,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:06:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:06:01,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:01,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:01,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:01,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:01,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:02,041 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2022-01-19 04:06:02,042 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 04:06:02,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2022-01-19 04:06:02,045 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-01-19 04:06:02,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-01-19 04:06:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 04:06:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 04:06:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-01-19 04:06:02,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-01-19 04:06:02,066 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-01-19 04:06:02,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-01-19 04:06:02,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:02,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-01-19 04:06:02,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,083 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,085 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-01-19 04:06:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-01-19 04:06:02,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 04:06:02,095 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-01-19 04:06:02,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-01-19 04:06:02,100 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-01-19 04:06:02,100 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-01-19 04:06:02,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:02,101 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:02,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 04:06:02,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-01-19 04:06:02,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:02,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506469260] [2022-01-19 04:06:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:02,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:02,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506469260] [2022-01-19 04:06:02,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506469260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:02,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:06:02,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:06:02,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292798004] [2022-01-19 04:06:02,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:02,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:06:02,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:06:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:06:02,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:02,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:02,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:02,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:02,371 INFO L129 PetriNetUnfolder]: 46/217 cut-off events. [2022-01-19 04:06:02,371 INFO L130 PetriNetUnfolder]: For 109/112 co-relation queries the response was YES. [2022-01-19 04:06:02,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 217 events. 46/217 cut-off events. For 109/112 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 853 event pairs, 0 based on Foata normal form. 3/204 useless extension candidates. Maximal degree in co-relation 376. Up to 35 conditions per place. [2022-01-19 04:06:02,373 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-01-19 04:06:02,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-01-19 04:06:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 04:06:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 04:06:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-01-19 04:06:02,378 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-01-19 04:06:02,378 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-01-19 04:06:02,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-01-19 04:06:02,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:02,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-01-19 04:06:02,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,381 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,381 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-01-19 04:06:02,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-01-19 04:06:02,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 04:06:02,387 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-01-19 04:06:02,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-01-19 04:06:02,388 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-19 04:06:02,389 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-01-19 04:06:02,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:02,389 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:02,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 04:06:02,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-01-19 04:06:02,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:02,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375186537] [2022-01-19 04:06:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:02,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:02,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375186537] [2022-01-19 04:06:02,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375186537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:02,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:06:02,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:06:02,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901963498] [2022-01-19 04:06:02,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:02,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:06:02,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:06:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:06:02,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:02,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:02,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:02,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:02,616 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-01-19 04:06:02,616 INFO L130 PetriNetUnfolder]: For 258/265 co-relation queries the response was YES. [2022-01-19 04:06:02,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 258/265 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 651 event pairs, 0 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-01-19 04:06:02,620 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-01-19 04:06:02,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-01-19 04:06:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 04:06:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 04:06:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-01-19 04:06:02,622 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-01-19 04:06:02,622 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-01-19 04:06:02,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-01-19 04:06:02,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:02,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-01-19 04:06:02,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,633 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,633 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-01-19 04:06:02,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-01-19 04:06:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-01-19 04:06:02,640 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-01-19 04:06:02,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-01-19 04:06:02,641 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-01-19 04:06:02,642 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-01-19 04:06:02,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:02,643 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:02,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 04:06:02,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-01-19 04:06:02,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:02,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787509798] [2022-01-19 04:06:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:02,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:02,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787509798] [2022-01-19 04:06:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787509798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:02,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:06:02,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:06:02,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90848481] [2022-01-19 04:06:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:06:02,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:06:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:06:02,750 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:02,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:02,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:02,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:02,840 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-01-19 04:06:02,840 INFO L130 PetriNetUnfolder]: For 246/265 co-relation queries the response was YES. [2022-01-19 04:06:02,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 246/265 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 614 event pairs, 0 based on Foata normal form. 16/184 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-01-19 04:06:02,842 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-01-19 04:06:02,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-01-19 04:06:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 04:06:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 04:06:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-01-19 04:06:02,844 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-01-19 04:06:02,844 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-01-19 04:06:02,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-01-19 04:06:02,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:02,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-01-19 04:06:02,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,847 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,847 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-01-19 04:06:02,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-01-19 04:06:02,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-01-19 04:06:02,853 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-01-19 04:06:02,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-01-19 04:06:02,854 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-01-19 04:06:02,854 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-01-19 04:06:02,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:02,855 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:02,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 04:06:02,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash 704825237, now seen corresponding path program 1 times [2022-01-19 04:06:02,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:02,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403326465] [2022-01-19 04:06:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:02,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:02,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403326465] [2022-01-19 04:06:02,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403326465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:02,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:06:02,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 04:06:02,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580571342] [2022-01-19 04:06:02,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:02,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 04:06:02,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 04:06:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-19 04:06:02,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:02,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:02,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:02,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:02,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:03,038 INFO L129 PetriNetUnfolder]: 43/227 cut-off events. [2022-01-19 04:06:03,039 INFO L130 PetriNetUnfolder]: For 607/629 co-relation queries the response was YES. [2022-01-19 04:06:03,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 227 events. 43/227 cut-off events. For 607/629 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 792 event pairs, 1 based on Foata normal form. 15/221 useless extension candidates. Maximal degree in co-relation 528. Up to 50 conditions per place. [2022-01-19 04:06:03,040 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-01-19 04:06:03,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-01-19 04:06:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 04:06:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 04:06:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-01-19 04:06:03,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-01-19 04:06:03,042 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-01-19 04:06:03,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-01-19 04:06:03,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:03,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-01-19 04:06:03,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,045 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,045 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-01-19 04:06:03,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-01-19 04:06:03,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-01-19 04:06:03,048 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-01-19 04:06:03,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-01-19 04:06:03,050 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-01-19 04:06:03,050 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-01-19 04:06:03,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:03,051 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:03,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 04:06:03,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1426423327, now seen corresponding path program 2 times [2022-01-19 04:06:03,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:03,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912767107] [2022-01-19 04:06:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:03,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:03,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:03,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912767107] [2022-01-19 04:06:03,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912767107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:03,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:06:03,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 04:06:03,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233254905] [2022-01-19 04:06:03,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:03,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 04:06:03,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:03,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 04:06:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-19 04:06:03,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:03,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:03,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:03,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:03,269 INFO L129 PetriNetUnfolder]: 38/219 cut-off events. [2022-01-19 04:06:03,269 INFO L130 PetriNetUnfolder]: For 828/871 co-relation queries the response was YES. [2022-01-19 04:06:03,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 219 events. 38/219 cut-off events. For 828/871 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 805 event pairs, 1 based on Foata normal form. 25/223 useless extension candidates. Maximal degree in co-relation 579. Up to 46 conditions per place. [2022-01-19 04:06:03,271 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 21 selfloop transitions, 23 changer transitions 11/100 dead transitions. [2022-01-19 04:06:03,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 791 flow [2022-01-19 04:06:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 04:06:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 04:06:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-01-19 04:06:03,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-19 04:06:03,273 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-01-19 04:06:03,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-01-19 04:06:03,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:03,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-01-19 04:06:03,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,278 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,278 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 12 states and 696 transitions. [2022-01-19 04:06:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 791 flow [2022-01-19 04:06:03,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 733 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-01-19 04:06:03,282 INFO L242 Difference]: Finished difference. Result has 106 places, 82 transitions, 505 flow [2022-01-19 04:06:03,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=505, PETRI_PLACES=106, PETRI_TRANSITIONS=82} [2022-01-19 04:06:03,284 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 36 predicate places. [2022-01-19 04:06:03,284 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 82 transitions, 505 flow [2022-01-19 04:06:03,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:03,285 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:03,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 04:06:03,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash 827405232, now seen corresponding path program 1 times [2022-01-19 04:06:03,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:03,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262321111] [2022-01-19 04:06:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:03,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:03,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262321111] [2022-01-19 04:06:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262321111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:03,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20879681] [2022-01-19 04:06:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:03,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:03,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:03,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 04:06:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 04:06:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:03,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20879681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:03,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:03,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-19 04:06:03,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140597818] [2022-01-19 04:06:03,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:03,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 04:06:03,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 04:06:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-19 04:06:03,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:03,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 82 transitions, 505 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:03,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:03,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:03,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:04,097 INFO L129 PetriNetUnfolder]: 50/302 cut-off events. [2022-01-19 04:06:04,097 INFO L130 PetriNetUnfolder]: For 1595/1642 co-relation queries the response was YES. [2022-01-19 04:06:04,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 302 events. 50/302 cut-off events. For 1595/1642 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1067 event pairs, 0 based on Foata normal form. 29/300 useless extension candidates. Maximal degree in co-relation 868. Up to 62 conditions per place. [2022-01-19 04:06:04,099 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 35 selfloop transitions, 17 changer transitions 20/117 dead transitions. [2022-01-19 04:06:04,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 117 transitions, 1183 flow [2022-01-19 04:06:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 04:06:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 04:06:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2022-01-19 04:06:04,101 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300751879699249 [2022-01-19 04:06:04,101 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2022-01-19 04:06:04,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2022-01-19 04:06:04,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:04,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2022-01-19 04:06:04,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:04,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:04,106 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:04,106 INFO L186 Difference]: Start difference. First operand has 106 places, 82 transitions, 505 flow. Second operand 19 states and 1104 transitions. [2022-01-19 04:06:04,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 117 transitions, 1183 flow [2022-01-19 04:06:04,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 117 transitions, 1094 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-01-19 04:06:04,111 INFO L242 Difference]: Finished difference. Result has 125 places, 88 transitions, 628 flow [2022-01-19 04:06:04,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=628, PETRI_PLACES=125, PETRI_TRANSITIONS=88} [2022-01-19 04:06:04,111 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2022-01-19 04:06:04,111 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 88 transitions, 628 flow [2022-01-19 04:06:04,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:04,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:04,112 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:04,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 04:06:04,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:04,330 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1816530946, now seen corresponding path program 2 times [2022-01-19 04:06:04,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:04,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288054308] [2022-01-19 04:06:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:04,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:04,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288054308] [2022-01-19 04:06:04,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288054308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178320370] [2022-01-19 04:06:04,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 04:06:04,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:04,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:04,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 04:06:04,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 04:06:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 04:06:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:04,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178320370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:04,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:04,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-19 04:06:04,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877118414] [2022-01-19 04:06:04,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:04,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-19 04:06:04,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-19 04:06:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-19 04:06:04,736 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:04,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 88 transitions, 628 flow. Second operand has 14 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:04,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:04,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:04,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:05,052 INFO L129 PetriNetUnfolder]: 70/430 cut-off events. [2022-01-19 04:06:05,053 INFO L130 PetriNetUnfolder]: For 5983/6065 co-relation queries the response was YES. [2022-01-19 04:06:05,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1713 conditions, 430 events. 70/430 cut-off events. For 5983/6065 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2129 event pairs, 0 based on Foata normal form. 30/418 useless extension candidates. Maximal degree in co-relation 1644. Up to 94 conditions per place. [2022-01-19 04:06:05,058 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 32 selfloop transitions, 43 changer transitions 23/143 dead transitions. [2022-01-19 04:06:05,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 143 transitions, 2111 flow [2022-01-19 04:06:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-19 04:06:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-01-19 04:06:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1564 transitions. [2022-01-19 04:06:05,062 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8275132275132275 [2022-01-19 04:06:05,062 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1564 transitions. [2022-01-19 04:06:05,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1564 transitions. [2022-01-19 04:06:05,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:05,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1564 transitions. [2022-01-19 04:06:05,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.925925925925924) internal successors, (1564), 27 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,070 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,070 INFO L186 Difference]: Start difference. First operand has 125 places, 88 transitions, 628 flow. Second operand 27 states and 1564 transitions. [2022-01-19 04:06:05,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 143 transitions, 2111 flow [2022-01-19 04:06:05,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 143 transitions, 1735 flow, removed 177 selfloop flow, removed 12 redundant places. [2022-01-19 04:06:05,081 INFO L242 Difference]: Finished difference. Result has 151 places, 108 transitions, 1053 flow [2022-01-19 04:06:05,081 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1053, PETRI_PLACES=151, PETRI_TRANSITIONS=108} [2022-01-19 04:06:05,082 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 81 predicate places. [2022-01-19 04:06:05,083 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 108 transitions, 1053 flow [2022-01-19 04:06:05,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,083 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:05,083 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:05,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:05,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-19 04:06:05,299 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2100588598, now seen corresponding path program 1 times [2022-01-19 04:06:05,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:05,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040591964] [2022-01-19 04:06:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:05,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:05,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040591964] [2022-01-19 04:06:05,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040591964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:05,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221493620] [2022-01-19 04:06:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:05,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:05,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:05,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 04:06:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 04:06:05,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:05,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221493620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:05,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:05,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-19 04:06:05,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845932836] [2022-01-19 04:06:05,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:05,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 04:06:05,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 04:06:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-19 04:06:05,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:05,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 108 transitions, 1053 flow. Second operand has 15 states, 15 states have (on average 56.46666666666667) internal successors, (847), 15 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:05,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:05,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:05,973 INFO L129 PetriNetUnfolder]: 99/635 cut-off events. [2022-01-19 04:06:05,973 INFO L130 PetriNetUnfolder]: For 17396/17503 co-relation queries the response was YES. [2022-01-19 04:06:05,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 635 events. 99/635 cut-off events. For 17396/17503 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3769 event pairs, 1 based on Foata normal form. 38/609 useless extension candidates. Maximal degree in co-relation 3131. Up to 140 conditions per place. [2022-01-19 04:06:05,979 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 42 selfloop transitions, 59 changer transitions 20/166 dead transitions. [2022-01-19 04:06:05,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 166 transitions, 3308 flow [2022-01-19 04:06:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 04:06:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 04:06:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1509 transitions. [2022-01-19 04:06:05,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8291208791208792 [2022-01-19 04:06:05,982 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1509 transitions. [2022-01-19 04:06:05,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1509 transitions. [2022-01-19 04:06:05,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:05,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1509 transitions. [2022-01-19 04:06:05,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 58.03846153846154) internal successors, (1509), 26 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 70.0) internal successors, (1890), 27 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,987 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 70.0) internal successors, (1890), 27 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:05,987 INFO L186 Difference]: Start difference. First operand has 151 places, 108 transitions, 1053 flow. Second operand 26 states and 1509 transitions. [2022-01-19 04:06:05,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 166 transitions, 3308 flow [2022-01-19 04:06:06,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 166 transitions, 2734 flow, removed 280 selfloop flow, removed 11 redundant places. [2022-01-19 04:06:06,007 INFO L242 Difference]: Finished difference. Result has 172 places, 124 transitions, 1475 flow [2022-01-19 04:06:06,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1475, PETRI_PLACES=172, PETRI_TRANSITIONS=124} [2022-01-19 04:06:06,007 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 102 predicate places. [2022-01-19 04:06:06,007 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 124 transitions, 1475 flow [2022-01-19 04:06:06,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.46666666666667) internal successors, (847), 15 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:06,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:06,008 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:06,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:06,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:06,225 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash 139077154, now seen corresponding path program 2 times [2022-01-19 04:06:06,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:06,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992891408] [2022-01-19 04:06:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:06,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:06,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:06,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992891408] [2022-01-19 04:06:06,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992891408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:06,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131485451] [2022-01-19 04:06:06,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 04:06:06,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:06,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 04:06:06,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 04:06:06,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 04:06:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:06,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:06,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131485451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:06,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:06,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-19 04:06:06,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156441164] [2022-01-19 04:06:06,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:06,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 04:06:06,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 04:06:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-19 04:06:06,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:06,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 124 transitions, 1475 flow. Second operand has 15 states, 15 states have (on average 56.53333333333333) internal successors, (848), 15 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:06,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:06,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:06,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:06,980 INFO L129 PetriNetUnfolder]: 110/701 cut-off events. [2022-01-19 04:06:06,981 INFO L130 PetriNetUnfolder]: For 29156/29323 co-relation queries the response was YES. [2022-01-19 04:06:06,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4089 conditions, 701 events. 110/701 cut-off events. For 29156/29323 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4224 event pairs, 0 based on Foata normal form. 44/676 useless extension candidates. Maximal degree in co-relation 3999. Up to 158 conditions per place. [2022-01-19 04:06:06,988 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 36 selfloop transitions, 85 changer transitions 28/194 dead transitions. [2022-01-19 04:06:06,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 194 transitions, 4681 flow [2022-01-19 04:06:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-19 04:06:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-01-19 04:06:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1796 transitions. [2022-01-19 04:06:06,990 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8276497695852535 [2022-01-19 04:06:06,990 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1796 transitions. [2022-01-19 04:06:06,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1796 transitions. [2022-01-19 04:06:06,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:06,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1796 transitions. [2022-01-19 04:06:06,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.935483870967744) internal successors, (1796), 31 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:06,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 70.0) internal successors, (2240), 32 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:06,995 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 70.0) internal successors, (2240), 32 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:06,995 INFO L186 Difference]: Start difference. First operand has 172 places, 124 transitions, 1475 flow. Second operand 31 states and 1796 transitions. [2022-01-19 04:06:06,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 194 transitions, 4681 flow [2022-01-19 04:06:07,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 194 transitions, 3461 flow, removed 574 selfloop flow, removed 22 redundant places. [2022-01-19 04:06:07,028 INFO L242 Difference]: Finished difference. Result has 192 places, 145 transitions, 1979 flow [2022-01-19 04:06:07,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1979, PETRI_PLACES=192, PETRI_TRANSITIONS=145} [2022-01-19 04:06:07,028 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 122 predicate places. [2022-01-19 04:06:07,029 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 145 transitions, 1979 flow [2022-01-19 04:06:07,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.53333333333333) internal successors, (848), 15 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:07,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:07,029 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:07,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:07,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:07,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2036624050, now seen corresponding path program 3 times [2022-01-19 04:06:07,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:07,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999280620] [2022-01-19 04:06:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:07,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:07,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999280620] [2022-01-19 04:06:07,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999280620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853852292] [2022-01-19 04:06:07,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 04:06:07,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:07,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:07,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:07,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 04:06:07,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-19 04:06:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 04:06:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:07,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:07,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853852292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:07,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:07,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-01-19 04:06:07,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307624490] [2022-01-19 04:06:07,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:07,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 04:06:07,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 04:06:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-19 04:06:07,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:07,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 145 transitions, 1979 flow. Second operand has 23 states, 23 states have (on average 56.391304347826086) internal successors, (1297), 23 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:07,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:07,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:07,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:08,446 INFO L129 PetriNetUnfolder]: 147/928 cut-off events. [2022-01-19 04:06:08,446 INFO L130 PetriNetUnfolder]: For 39750/39907 co-relation queries the response was YES. [2022-01-19 04:06:08,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5561 conditions, 928 events. 147/928 cut-off events. For 39750/39907 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5547 event pairs, 0 based on Foata normal form. 43/877 useless extension candidates. Maximal degree in co-relation 5464. Up to 200 conditions per place. [2022-01-19 04:06:08,457 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 48 selfloop transitions, 122 changer transitions 29/244 dead transitions. [2022-01-19 04:06:08,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 244 transitions, 6729 flow [2022-01-19 04:06:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 04:06:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 04:06:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2720 transitions. [2022-01-19 04:06:08,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8267477203647416 [2022-01-19 04:06:08,460 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2720 transitions. [2022-01-19 04:06:08,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2720 transitions. [2022-01-19 04:06:08,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:08,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2720 transitions. [2022-01-19 04:06:08,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.87234042553192) internal successors, (2720), 47 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:08,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 70.0) internal successors, (3360), 48 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:08,467 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 70.0) internal successors, (3360), 48 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:08,468 INFO L186 Difference]: Start difference. First operand has 192 places, 145 transitions, 1979 flow. Second operand 47 states and 2720 transitions. [2022-01-19 04:06:08,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 244 transitions, 6729 flow [2022-01-19 04:06:08,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 244 transitions, 5655 flow, removed 497 selfloop flow, removed 24 redundant places. [2022-01-19 04:06:08,521 INFO L242 Difference]: Finished difference. Result has 234 places, 182 transitions, 3059 flow [2022-01-19 04:06:08,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3059, PETRI_PLACES=234, PETRI_TRANSITIONS=182} [2022-01-19 04:06:08,522 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 164 predicate places. [2022-01-19 04:06:08,522 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 182 transitions, 3059 flow [2022-01-19 04:06:08,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.391304347826086) internal successors, (1297), 23 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:08,522 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:08,522 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:08,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:08,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-19 04:06:08,735 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1550821001, now seen corresponding path program 4 times [2022-01-19 04:06:08,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405114802] [2022-01-19 04:06:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:08,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:08,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405114802] [2022-01-19 04:06:08,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405114802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782506635] [2022-01-19 04:06:08,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 04:06:08,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:08,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:08,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:08,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 04:06:08,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 04:06:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 04:06:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:09,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:09,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782506635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:09,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:09,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-01-19 04:06:09,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325117203] [2022-01-19 04:06:09,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:09,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 04:06:09,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 04:06:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 04:06:09,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:09,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 182 transitions, 3059 flow. Second operand has 36 states, 36 states have (on average 56.22222222222222) internal successors, (2024), 36 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:09,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:09,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:09,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:10,735 INFO L129 PetriNetUnfolder]: 215/1372 cut-off events. [2022-01-19 04:06:10,736 INFO L130 PetriNetUnfolder]: For 118864/119504 co-relation queries the response was YES. [2022-01-19 04:06:10,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10954 conditions, 1372 events. 215/1372 cut-off events. For 118864/119504 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8531 event pairs, 0 based on Foata normal form. 45/1273 useless extension candidates. Maximal degree in co-relation 10842. Up to 322 conditions per place. [2022-01-19 04:06:10,756 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 97 selfloop transitions, 133 changer transitions 50/325 dead transitions. [2022-01-19 04:06:10,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 325 transitions, 12245 flow [2022-01-19 04:06:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 04:06:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 04:06:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3350 transitions. [2022-01-19 04:06:10,759 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8251231527093597 [2022-01-19 04:06:10,759 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3350 transitions. [2022-01-19 04:06:10,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3350 transitions. [2022-01-19 04:06:10,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:10,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3350 transitions. [2022-01-19 04:06:10,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 57.758620689655174) internal successors, (3350), 58 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:10,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:10,768 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:10,768 INFO L186 Difference]: Start difference. First operand has 234 places, 182 transitions, 3059 flow. Second operand 58 states and 3350 transitions. [2022-01-19 04:06:10,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 325 transitions, 12245 flow [2022-01-19 04:06:10,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 325 transitions, 9783 flow, removed 1206 selfloop flow, removed 23 redundant places. [2022-01-19 04:06:10,907 INFO L242 Difference]: Finished difference. Result has 293 places, 239 transitions, 4675 flow [2022-01-19 04:06:10,907 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=4675, PETRI_PLACES=293, PETRI_TRANSITIONS=239} [2022-01-19 04:06:10,908 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 223 predicate places. [2022-01-19 04:06:10,908 INFO L470 AbstractCegarLoop]: Abstraction has has 293 places, 239 transitions, 4675 flow [2022-01-19 04:06:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 56.22222222222222) internal successors, (2024), 36 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:10,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:10,909 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:10,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:11,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:11,128 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1610619445, now seen corresponding path program 5 times [2022-01-19 04:06:11,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:11,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555239315] [2022-01-19 04:06:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:11,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:11,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555239315] [2022-01-19 04:06:11,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555239315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291894430] [2022-01-19 04:06:11,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 04:06:11,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:11,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:11,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 04:06:11,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-19 04:06:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 04:06:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:11,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:12,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291894430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:12,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:12,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-01-19 04:06:12,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693604096] [2022-01-19 04:06:12,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:12,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 04:06:12,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 04:06:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 04:06:12,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:12,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 239 transitions, 4675 flow. Second operand has 36 states, 36 states have (on average 56.25) internal successors, (2025), 36 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:12,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:12,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:12,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:13,587 INFO L129 PetriNetUnfolder]: 274/1920 cut-off events. [2022-01-19 04:06:13,587 INFO L130 PetriNetUnfolder]: For 273135/273512 co-relation queries the response was YES. [2022-01-19 04:06:13,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16966 conditions, 1920 events. 274/1920 cut-off events. For 273135/273512 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 13009 event pairs, 0 based on Foata normal form. 53/1769 useless extension candidates. Maximal degree in co-relation 16832. Up to 430 conditions per place. [2022-01-19 04:06:13,619 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 74 selfloop transitions, 225 changer transitions 50/394 dead transitions. [2022-01-19 04:06:13,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 394 transitions, 16683 flow [2022-01-19 04:06:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-19 04:06:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-01-19 04:06:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3814 transitions. [2022-01-19 04:06:13,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8255411255411256 [2022-01-19 04:06:13,623 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3814 transitions. [2022-01-19 04:06:13,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3814 transitions. [2022-01-19 04:06:13,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:13,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3814 transitions. [2022-01-19 04:06:13,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 57.78787878787879) internal successors, (3814), 66 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:13,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 70.0) internal successors, (4690), 67 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:13,633 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 70.0) internal successors, (4690), 67 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:13,633 INFO L186 Difference]: Start difference. First operand has 293 places, 239 transitions, 4675 flow. Second operand 66 states and 3814 transitions. [2022-01-19 04:06:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 394 transitions, 16683 flow [2022-01-19 04:06:13,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 394 transitions, 14023 flow, removed 1302 selfloop flow, removed 28 redundant places. [2022-01-19 04:06:13,958 INFO L242 Difference]: Finished difference. Result has 352 places, 300 transitions, 6656 flow [2022-01-19 04:06:13,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3699, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6656, PETRI_PLACES=352, PETRI_TRANSITIONS=300} [2022-01-19 04:06:13,959 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 282 predicate places. [2022-01-19 04:06:13,959 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 300 transitions, 6656 flow [2022-01-19 04:06:13,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 56.25) internal successors, (2025), 36 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:13,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:13,959 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:13,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:14,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:14,176 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2050889689, now seen corresponding path program 6 times [2022-01-19 04:06:14,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259439468] [2022-01-19 04:06:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:14,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:14,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259439468] [2022-01-19 04:06:14,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259439468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372700124] [2022-01-19 04:06:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 04:06:14,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:14,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:14,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 04:06:14,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-19 04:06:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 04:06:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:14,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:14,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372700124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:14,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:14,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-01-19 04:06:14,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307857226] [2022-01-19 04:06:14,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 04:06:14,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 04:06:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 04:06:14,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:14,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 300 transitions, 6656 flow. Second operand has 35 states, 35 states have (on average 56.22857142857143) internal successors, (1968), 35 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:14,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:14,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:14,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:16,908 INFO L129 PetriNetUnfolder]: 347/2282 cut-off events. [2022-01-19 04:06:16,908 INFO L130 PetriNetUnfolder]: For 496219/497571 co-relation queries the response was YES. [2022-01-19 04:06:16,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25191 conditions, 2282 events. 347/2282 cut-off events. For 496219/497571 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 15516 event pairs, 1 based on Foata normal form. 65/2112 useless extension candidates. Maximal degree in co-relation 25035. Up to 530 conditions per place. [2022-01-19 04:06:16,947 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 85 selfloop transitions, 294 changer transitions 56/480 dead transitions. [2022-01-19 04:06:16,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 480 transitions, 25645 flow [2022-01-19 04:06:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-19 04:06:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-01-19 04:06:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4747 transitions. [2022-01-19 04:06:16,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8270034843205575 [2022-01-19 04:06:16,951 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4747 transitions. [2022-01-19 04:06:16,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4747 transitions. [2022-01-19 04:06:16,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:16,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4747 transitions. [2022-01-19 04:06:16,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 57.890243902439025) internal successors, (4747), 82 states have internal predecessors, (4747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:16,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 70.0) internal successors, (5810), 83 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:16,964 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 70.0) internal successors, (5810), 83 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:16,964 INFO L186 Difference]: Start difference. First operand has 352 places, 300 transitions, 6656 flow. Second operand 82 states and 4747 transitions. [2022-01-19 04:06:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 480 transitions, 25645 flow [2022-01-19 04:06:17,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 480 transitions, 21237 flow, removed 2111 selfloop flow, removed 36 redundant places. [2022-01-19 04:06:17,515 INFO L242 Difference]: Finished difference. Result has 433 places, 361 transitions, 9848 flow [2022-01-19 04:06:17,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=9848, PETRI_PLACES=433, PETRI_TRANSITIONS=361} [2022-01-19 04:06:17,516 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 363 predicate places. [2022-01-19 04:06:17,516 INFO L470 AbstractCegarLoop]: Abstraction has has 433 places, 361 transitions, 9848 flow [2022-01-19 04:06:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.22857142857143) internal successors, (1968), 35 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:17,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:17,517 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:17,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 04:06:17,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 04:06:17,732 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1482551010, now seen corresponding path program 7 times [2022-01-19 04:06:17,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247637480] [2022-01-19 04:06:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:17,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:18,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247637480] [2022-01-19 04:06:18,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247637480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458519188] [2022-01-19 04:06:18,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 04:06:18,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:18,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:18,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 04:06:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 04:06:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:18,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:18,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458519188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:18,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:18,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2022-01-19 04:06:18,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157477622] [2022-01-19 04:06:18,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:18,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-19 04:06:18,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-19 04:06:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2022-01-19 04:06:18,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:18,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 361 transitions, 9848 flow. Second operand has 51 states, 51 states have (on average 56.19607843137255) internal successors, (2866), 51 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:18,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:18,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:18,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:22,317 INFO L129 PetriNetUnfolder]: 455/3035 cut-off events. [2022-01-19 04:06:22,317 INFO L130 PetriNetUnfolder]: For 1118827/1120621 co-relation queries the response was YES. [2022-01-19 04:06:22,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40788 conditions, 3035 events. 455/3035 cut-off events. For 1118827/1120621 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 20795 event pairs, 0 based on Foata normal form. 78/2799 useless extension candidates. Maximal degree in co-relation 40596. Up to 690 conditions per place. [2022-01-19 04:06:22,387 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 114 selfloop transitions, 406 changer transitions 63/628 dead transitions. [2022-01-19 04:06:22,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 628 transitions, 41506 flow [2022-01-19 04:06:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-19 04:06:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-01-19 04:06:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 6413 transitions. [2022-01-19 04:06:22,392 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8253539253539254 [2022-01-19 04:06:22,392 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 6413 transitions. [2022-01-19 04:06:22,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 6413 transitions. [2022-01-19 04:06:22,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:22,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 6413 transitions. [2022-01-19 04:06:22,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 57.77477477477478) internal successors, (6413), 111 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:22,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 70.0) internal successors, (7840), 112 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:22,409 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 70.0) internal successors, (7840), 112 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:22,409 INFO L186 Difference]: Start difference. First operand has 433 places, 361 transitions, 9848 flow. Second operand 111 states and 6413 transitions. [2022-01-19 04:06:22,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 628 transitions, 41506 flow [2022-01-19 04:06:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 628 transitions, 32349 flow, removed 4455 selfloop flow, removed 45 redundant places. [2022-01-19 04:06:23,846 INFO L242 Difference]: Finished difference. Result has 532 places, 473 transitions, 13336 flow [2022-01-19 04:06:23,847 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=13336, PETRI_PLACES=532, PETRI_TRANSITIONS=473} [2022-01-19 04:06:23,847 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 462 predicate places. [2022-01-19 04:06:23,847 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 473 transitions, 13336 flow [2022-01-19 04:06:23,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 56.19607843137255) internal successors, (2866), 51 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:23,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:23,848 INFO L254 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 04:06:23,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:24,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 04:06:24,048 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:24,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2142341286, now seen corresponding path program 8 times [2022-01-19 04:06:24,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:24,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741743610] [2022-01-19 04:06:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:24,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1766 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-19 04:06:24,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741743610] [2022-01-19 04:06:24,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741743610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205583369] [2022-01-19 04:06:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 04:06:24,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:24,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:24,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 04:06:24,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 04:06:24,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-19 04:06:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1843 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-19 04:06:24,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 04:06:24,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205583369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:24,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 04:06:24,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2022-01-19 04:06:24,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161183974] [2022-01-19 04:06:24,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:24,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-19 04:06:24,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-19 04:06:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2022-01-19 04:06:24,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-01-19 04:06:24,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 473 transitions, 13336 flow. Second operand has 43 states, 43 states have (on average 59.95348837209303) internal successors, (2578), 43 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:24,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:24,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-01-19 04:06:24,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:39,438 INFO L129 PetriNetUnfolder]: 6624/32207 cut-off events. [2022-01-19 04:06:39,439 INFO L130 PetriNetUnfolder]: For 14858604/14859195 co-relation queries the response was YES. [2022-01-19 04:06:40,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432736 conditions, 32207 events. 6624/32207 cut-off events. For 14858604/14859195 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 395239 event pairs, 1789 based on Foata normal form. 76/28465 useless extension candidates. Maximal degree in co-relation 432547. Up to 7631 conditions per place. [2022-01-19 04:06:40,269 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 623/623 dead transitions. [2022-01-19 04:06:40,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 623 transitions, 13452 flow [2022-01-19 04:06:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 04:06:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 04:06:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3820 transitions. [2022-01-19 04:06:40,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8662131519274376 [2022-01-19 04:06:40,271 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3820 transitions. [2022-01-19 04:06:40,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3820 transitions. [2022-01-19 04:06:40,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:40,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3820 transitions. [2022-01-19 04:06:40,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.63492063492063) internal successors, (3820), 63 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:40,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 70.0) internal successors, (4480), 64 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:40,279 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 70.0) internal successors, (4480), 64 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:06:40,279 INFO L186 Difference]: Start difference. First operand has 532 places, 473 transitions, 13336 flow. Second operand 63 states and 3820 transitions. [2022-01-19 04:06:40,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 623 transitions, 13452 flow [2022-01-19 04:07:13,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 623 transitions, 8816 flow, removed 2119 selfloop flow, removed 60 redundant places. [2022-01-19 04:07:13,623 INFO L242 Difference]: Finished difference. Result has 511 places, 0 transitions, 0 flow [2022-01-19 04:07:13,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8050, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=0, PETRI_PLACES=511, PETRI_TRANSITIONS=0} [2022-01-19 04:07:13,623 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 441 predicate places. [2022-01-19 04:07:13,623 INFO L470 AbstractCegarLoop]: Abstraction has has 511 places, 0 transitions, 0 flow [2022-01-19 04:07:13,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 59.95348837209303) internal successors, (2578), 43 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 04:07:13,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 04:07:13,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 04:07:13,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 04:07:13,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-19 04:07:13,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 04:07:13,829 INFO L732 BasicCegarLoop]: Path program histogram: [8, 2, 2, 2, 1, 1] [2022-01-19 04:07:13,830 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 04:07:13,830 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 04:07:13,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 04:07:13 BasicIcfg [2022-01-19 04:07:13,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 04:07:13,833 INFO L158 Benchmark]: Toolchain (without parser) took 73041.06ms. Allocated memory was 434.1MB in the beginning and 9.7GB in the end (delta: 9.3GB). Free memory was 378.3MB in the beginning and 5.7GB in the end (delta: -5.3GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2022-01-19 04:07:13,833 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 434.1MB. Free memory is still 395.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 04:07:13,833 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.98ms. Allocated memory was 434.1MB in the beginning and 604.0MB in the end (delta: 169.9MB). Free memory was 378.2MB in the beginning and 566.5MB in the end (delta: -188.3MB). Peak memory consumption was 6.9MB. Max. memory is 16.0GB. [2022-01-19 04:07:13,833 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.21ms. Allocated memory is still 604.0MB. Free memory was 566.5MB in the beginning and 564.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 04:07:13,833 INFO L158 Benchmark]: Boogie Preprocessor took 14.23ms. Allocated memory is still 604.0MB. Free memory was 564.4MB in the beginning and 563.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 04:07:13,833 INFO L158 Benchmark]: RCFGBuilder took 270.18ms. Allocated memory is still 604.0MB. Free memory was 563.4MB in the beginning and 548.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 04:07:13,834 INFO L158 Benchmark]: TraceAbstraction took 72440.70ms. Allocated memory was 604.0MB in the beginning and 9.7GB in the end (delta: 9.1GB). Free memory was 547.6MB in the beginning and 5.7GB in the end (delta: -5.1GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2022-01-19 04:07:13,835 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 434.1MB. Free memory is still 395.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 287.98ms. Allocated memory was 434.1MB in the beginning and 604.0MB in the end (delta: 169.9MB). Free memory was 378.2MB in the beginning and 566.5MB in the end (delta: -188.3MB). Peak memory consumption was 6.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.21ms. Allocated memory is still 604.0MB. Free memory was 566.5MB in the beginning and 564.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.23ms. Allocated memory is still 604.0MB. Free memory was 564.4MB in the beginning and 563.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 270.18ms. Allocated memory is still 604.0MB. Free memory was 563.4MB in the beginning and 548.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 72440.70ms. Allocated memory was 604.0MB in the beginning and 9.7GB in the end (delta: 9.1GB). Free memory was 547.6MB in the beginning and 5.7GB in the end (delta: -5.1GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 72.3s, OverallIterations: 16, TraceHistogramMax: 21, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 62.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1472 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1472 mSDsluCounter, 293 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 559 mSDsCounter, 1758 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3077 IncrementalHoareTripleChecker+Invalid, 4835 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1758 mSolverCounterUnsat, 87 mSDtfsCounter, 3077 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2415 GetRequests, 1649 SyntacticMatches, 2 SemanticMatches, 764 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19918 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13336occurred in iteration=15, InterpolantAutomatonStates: 589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 2218 NumberOfCodeBlocks, 2218 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 2935 ConstructedInterpolants, 0 QuantifiedInterpolants, 10333 SizeOfPredicates, 140 NumberOfNonLiveVariables, 2176 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 35 InterpolantComputations, 7 PerfectInterpolantSequences, 3690/7804 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-19 04:07:13,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...