/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 04:05:50,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 04:05:50,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 04:05:50,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 04:05:50,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 04:05:50,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 04:05:50,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 04:05:50,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 04:05:50,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 04:05:50,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 04:05:50,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 04:05:50,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 04:05:50,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 04:05:50,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 04:05:50,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 04:05:50,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 04:05:50,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 04:05:50,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 04:05:50,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 04:05:50,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 04:05:50,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 04:05:50,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 04:05:50,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 04:05:50,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 04:05:50,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-19 04:05:50,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 04:05:50,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 04:05:50,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 04:05:50,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 04:05:50,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 04:05:50,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 04:05:50,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 04:05:50,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 04:05:50,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 04:05:50,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 04:05:50,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 04:05:50,460 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 04:05:50,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 04:05:50,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 04:05:50,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 04:05:50,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 04:05:50,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 04:05:50,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 04:05:50,481 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 04:05:50,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 04:05:50,481 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 04:05:50,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 04:05:50,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 04:05:50,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 04:05:50,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 04:05:50,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 04:05:50,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 04:05:50,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 04:05:50,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 04:05:50,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 04:05:50,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 04:05:50,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 04:05:50,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 04:05:50,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 04:05:50,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 04:05:50,484 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 04:05:50,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 04:05:50,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 04:05:50,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 04:05:50,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 04:05:50,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 04:05:50,673 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 04:05:50,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2022-01-19 04:05:50,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d71422c/df52a8b06c544573b3982a73fccbdf0d/FLAG118df2899 [2022-01-19 04:05:51,030 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 04:05:51,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2022-01-19 04:05:51,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d71422c/df52a8b06c544573b3982a73fccbdf0d/FLAG118df2899 [2022-01-19 04:05:51,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d71422c/df52a8b06c544573b3982a73fccbdf0d [2022-01-19 04:05:51,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 04:05:51,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 04:05:51,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 04:05:51,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 04:05:51,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 04:05:51,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e2eacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51, skipping insertion in model container [2022-01-19 04:05:51,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 04:05:51,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 04:05:51,698 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-longer-1.i[30961,30974] [2022-01-19 04:05:51,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 04:05:51,709 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 04:05:51,760 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-longer-1.i[30961,30974] [2022-01-19 04:05:51,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 04:05:51,791 INFO L208 MainTranslator]: Completed translation [2022-01-19 04:05:51,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51 WrapperNode [2022-01-19 04:05:51,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 04:05:51,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 04:05:51,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 04:05:51,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 04:05:51,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,836 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-01-19 04:05:51,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 04:05:51,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 04:05:51,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 04:05:51,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 04:05:51,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 04:05:51,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 04:05:51,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 04:05:51,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 04:05:51,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (1/1) ... [2022-01-19 04:05:51,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 04:05:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:05:51,893 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 04:05:51,900 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 04:05:51,920 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-01-19 04:05:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-01-19 04:05:51,920 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-01-19 04:05:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-01-19 04:05:51,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 04:05:51,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 04:05:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 04:05:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 04:05:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 04:05:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 04:05:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 04:05:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 04:05:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 04:05:51,922 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 04:05:51,993 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 04:05:51,994 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 04:05:52,135 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 04:05:52,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 04:05:52,140 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 04:05:52,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 04:05:52 BoogieIcfgContainer [2022-01-19 04:05:52,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 04:05:52,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 04:05:52,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 04:05:52,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 04:05:52,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 04:05:51" (1/3) ... [2022-01-19 04:05:52,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415c8589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 04:05:52, skipping insertion in model container [2022-01-19 04:05:52,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 04:05:51" (2/3) ... [2022-01-19 04:05:52,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415c8589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 04:05:52, skipping insertion in model container [2022-01-19 04:05:52,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 04:05:52" (3/3) ... [2022-01-19 04:05:52,147 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2022-01-19 04:05:52,151 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 04:05:52,151 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 04:05:52,151 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 04:05:52,172 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,173 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,174 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,174 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,174 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,175 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,175 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,175 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,175 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,175 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,175 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,176 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,177 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,178 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,179 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,179 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,179 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,179 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,179 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,179 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,180 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,181 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,181 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,181 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,183 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,183 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,184 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,184 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,184 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,184 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,186 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,186 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,186 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,186 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,187 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,187 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 04:05:52,187 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-19 04:05:52,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 04:05:52,221 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 04:05:52,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 04:05:52,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-01-19 04:05:52,250 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-19 04:05:52,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 04:05:52,252 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 04:05:52,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-01-19 04:05:52,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-01-19 04:05:52,266 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-01-19 04:05:52,266 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 04:05:52,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:52,267 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 04:05:52,267 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:52,270 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-01-19 04:05:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896177774] [2022-01-19 04:05:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:52,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:52,594 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 04:05:52,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:52,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896177774] [2022-01-19 04:05:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896177774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:05:52,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:05:52,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:05:52,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663990776] [2022-01-19 04:05:52,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:05:52,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:05:52,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:05:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:05:52,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:52,650 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 04:05:52,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:52,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:52,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:52,804 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2022-01-19 04:05:52,804 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 04:05:52,805 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 04:05:52,807 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-01-19 04:05:52,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-01-19 04:05:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 04:05:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 04:05:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-01-19 04:05:52,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-01-19 04:05:52,822 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-01-19 04:05:52,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-01-19 04:05:52,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:52,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-01-19 04:05:52,829 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 04:05:52,837 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 04:05:52,837 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 04:05:52,838 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-01-19 04:05:52,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-01-19 04:05:52,841 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 04:05:52,843 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-01-19 04:05:52,844 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 04:05:52,846 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-01-19 04:05:52,846 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-01-19 04:05:52,847 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 04:05:52,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:52,847 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 04:05:52,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 04:05:52,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-01-19 04:05:52,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:52,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104169450] [2022-01-19 04:05:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:52,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:52,911 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 04:05:52,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104169450] [2022-01-19 04:05:52,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104169450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:05:52,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:05:52,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:05:52,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078785570] [2022-01-19 04:05:52,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:05:52,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:05:52,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:05:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:05:52,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:52,914 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 04:05:52,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:52,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:52,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:53,043 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-01-19 04:05:53,044 INFO L130 PetriNetUnfolder]: For 111/114 co-relation queries the response was YES. [2022-01-19 04:05:53,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 111/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 848 event pairs, 0 based on Foata normal form. 3/205 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-01-19 04:05:53,047 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-01-19 04:05:53,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-01-19 04:05:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 04:05:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 04:05:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-01-19 04:05:53,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-01-19 04:05:53,048 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-01-19 04:05:53,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-01-19 04:05:53,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:53,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-01-19 04:05:53,050 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 04:05:53,052 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 04:05:53,052 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 04:05:53,052 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-01-19 04:05:53,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-01-19 04:05:53,057 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 04:05:53,059 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-01-19 04:05:53,059 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 04:05:53,060 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-19 04:05:53,060 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-01-19 04:05:53,060 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 04:05:53,060 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:53,060 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 04:05:53,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 04:05:53,061 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-01-19 04:05:53,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:53,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334599536] [2022-01-19 04:05:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:53,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:53,163 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 04:05:53,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334599536] [2022-01-19 04:05:53,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334599536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:05:53,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:05:53,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:05:53,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900889633] [2022-01-19 04:05:53,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:05:53,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:05:53,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:05:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:05:53,167 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:53,168 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 04:05:53,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:53,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:53,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:53,237 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2022-01-19 04:05:53,237 INFO L130 PetriNetUnfolder]: For 251/258 co-relation queries the response was YES. [2022-01-19 04:05:53,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 251/258 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 602 event pairs, 0 based on Foata normal form. 10/180 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2022-01-19 04:05:53,239 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-01-19 04:05:53,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-01-19 04:05:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 04:05:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 04:05:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-01-19 04:05:53,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-01-19 04:05:53,240 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-01-19 04:05:53,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-01-19 04:05:53,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:53,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-01-19 04:05:53,242 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 04:05:53,243 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 04:05:53,243 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 04:05:53,243 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-01-19 04:05:53,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-01-19 04:05:53,245 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 04:05:53,246 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-01-19 04:05:53,246 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 04:05:53,246 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-01-19 04:05:53,247 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-01-19 04:05:53,247 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 04:05:53,247 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:53,247 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 04:05:53,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 04:05:53,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-01-19 04:05:53,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:53,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279988122] [2022-01-19 04:05:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:53,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:53,336 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 04:05:53,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279988122] [2022-01-19 04:05:53,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279988122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:05:53,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:05:53,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 04:05:53,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90871650] [2022-01-19 04:05:53,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:05:53,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 04:05:53,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 04:05:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-19 04:05:53,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:53,343 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 04:05:53,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:53,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:53,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:53,421 INFO L129 PetriNetUnfolder]: 30/177 cut-off events. [2022-01-19 04:05:53,422 INFO L130 PetriNetUnfolder]: For 232/248 co-relation queries the response was YES. [2022-01-19 04:05:53,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 177 events. 30/177 cut-off events. For 232/248 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 550 event pairs, 0 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 365. Up to 32 conditions per place. [2022-01-19 04:05:53,423 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-01-19 04:05:53,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-01-19 04:05:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 04:05:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 04:05:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-01-19 04:05:53,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-01-19 04:05:53,424 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-01-19 04:05:53,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-01-19 04:05:53,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:53,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-01-19 04:05:53,426 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 04:05:53,427 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 04:05:53,427 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 04:05:53,427 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-01-19 04:05:53,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-01-19 04:05:53,430 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 04:05:53,434 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-01-19 04:05:53,434 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 04:05:53,435 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-01-19 04:05:53,435 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-01-19 04:05:53,435 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 04:05:53,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:53,435 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 04:05:53,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 04:05:53,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1734522485, now seen corresponding path program 1 times [2022-01-19 04:05:53,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:53,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674920083] [2022-01-19 04:05:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:53,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:53,539 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 04:05:53,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674920083] [2022-01-19 04:05:53,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674920083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:05:53,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:05:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 04:05:53,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148962757] [2022-01-19 04:05:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:05:53,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 04:05:53,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 04:05:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-19 04:05:53,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:53,542 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 04:05:53,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:53,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:53,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:53,636 INFO L129 PetriNetUnfolder]: 32/173 cut-off events. [2022-01-19 04:05:53,637 INFO L130 PetriNetUnfolder]: For 432/450 co-relation queries the response was YES. [2022-01-19 04:05:53,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 173 events. 32/173 cut-off events. For 432/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 519 event pairs, 1 based on Foata normal form. 15/173 useless extension candidates. Maximal degree in co-relation 404. Up to 36 conditions per place. [2022-01-19 04:05:53,638 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 19 changer transitions 8/91 dead transitions. [2022-01-19 04:05:53,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 91 transitions, 584 flow [2022-01-19 04:05:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 04:05:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 04:05:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-01-19 04:05:53,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-19 04:05:53,640 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-01-19 04:05:53,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-01-19 04:05:53,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:53,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-01-19 04:05:53,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 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 04:05:53,642 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 04:05:53,642 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 04:05:53,642 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 638 transitions. [2022-01-19 04:05:53,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 91 transitions, 584 flow [2022-01-19 04:05:53,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 498 flow, removed 30 selfloop flow, removed 10 redundant places. [2022-01-19 04:05:53,646 INFO L242 Difference]: Finished difference. Result has 96 places, 77 transitions, 390 flow [2022-01-19 04:05:53,646 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=390, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2022-01-19 04:05:53,648 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-19 04:05:53,648 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 390 flow [2022-01-19 04:05:53,648 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 04:05:53,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:53,648 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 04:05:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 04:05:53,649 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 2 times [2022-01-19 04:05:53,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609469243] [2022-01-19 04:05:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:53,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:53,716 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 04:05:53,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609469243] [2022-01-19 04:05:53,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609469243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:05:53,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 04:05:53,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 04:05:53,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046113931] [2022-01-19 04:05:53,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:05:53,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 04:05:53,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 04:05:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-19 04:05:53,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:53,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 390 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 04:05:53,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:53,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:53,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:53,837 INFO L129 PetriNetUnfolder]: 33/189 cut-off events. [2022-01-19 04:05:53,837 INFO L130 PetriNetUnfolder]: For 497/515 co-relation queries the response was YES. [2022-01-19 04:05:53,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 189 events. 33/189 cut-off events. For 497/515 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 665 event pairs, 0 based on Foata normal form. 16/188 useless extension candidates. Maximal degree in co-relation 473. Up to 38 conditions per place. [2022-01-19 04:05:53,840 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 22 selfloop transitions, 17 changer transitions 5/89 dead transitions. [2022-01-19 04:05:53,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 604 flow [2022-01-19 04:05:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 04:05:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 04:05:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-01-19 04:05:53,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-01-19 04:05:53,842 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-01-19 04:05:53,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-01-19 04:05:53,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:53,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-01-19 04:05:53,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 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 04:05:53,844 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 04:05:53,846 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 04:05:53,846 INFO L186 Difference]: Start difference. First operand has 96 places, 77 transitions, 390 flow. Second operand 12 states and 695 transitions. [2022-01-19 04:05:53,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 604 flow [2022-01-19 04:05:53,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 563 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-01-19 04:05:53,851 INFO L242 Difference]: Finished difference. Result has 102 places, 80 transitions, 442 flow [2022-01-19 04:05:53,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=102, PETRI_TRANSITIONS=80} [2022-01-19 04:05:53,852 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 32 predicate places. [2022-01-19 04:05:53,853 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 80 transitions, 442 flow [2022-01-19 04:05:53,853 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 04:05:53,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:53,853 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 04:05:53,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 04:05:53,853 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1110018853, now seen corresponding path program 1 times [2022-01-19 04:05:53,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473097582] [2022-01-19 04:05:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:53,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:53,911 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 04:05:53,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473097582] [2022-01-19 04:05:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473097582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:05:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290894714] [2022-01-19 04:05:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:53,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:05:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:05:53,913 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 04:05:53,929 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 04:05:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 04:05:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:05:54,181 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 04:05:54,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:05:54,337 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 04:05:54,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290894714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:05:54,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:05:54,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-19 04:05:54,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375197835] [2022-01-19 04:05:54,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:05:54,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 04:05:54,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:54,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 04:05:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-19 04:05:54,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:54,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 80 transitions, 442 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 04:05:54,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:54,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:54,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:54,570 INFO L129 PetriNetUnfolder]: 51/288 cut-off events. [2022-01-19 04:05:54,570 INFO L130 PetriNetUnfolder]: For 900/931 co-relation queries the response was YES. [2022-01-19 04:05:54,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 288 events. 51/288 cut-off events. For 900/931 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1073 event pairs, 1 based on Foata normal form. 19/279 useless extension candidates. Maximal degree in co-relation 752. Up to 60 conditions per place. [2022-01-19 04:05:54,572 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 26 selfloop transitions, 34 changer transitions 14/119 dead transitions. [2022-01-19 04:05:54,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 1052 flow [2022-01-19 04:05:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 04:05:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 04:05:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-01-19 04:05:54,575 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-01-19 04:05:54,575 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-01-19 04:05:54,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-01-19 04:05:54,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:54,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-01-19 04:05:54,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 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 04:05:54,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 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 04:05:54,579 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 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 04:05:54,579 INFO L186 Difference]: Start difference. First operand has 102 places, 80 transitions, 442 flow. Second operand 20 states and 1159 transitions. [2022-01-19 04:05:54,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 1052 flow [2022-01-19 04:05:54,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 119 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-01-19 04:05:54,583 INFO L242 Difference]: Finished difference. Result has 122 places, 96 transitions, 736 flow [2022-01-19 04:05:54,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=736, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2022-01-19 04:05:54,584 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 52 predicate places. [2022-01-19 04:05:54,584 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 736 flow [2022-01-19 04:05:54,585 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 04:05:54,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:54,585 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-19 04:05:54,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 04:05:54,799 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 04:05:54,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash 936563082, now seen corresponding path program 1 times [2022-01-19 04:05:54,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:54,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955301977] [2022-01-19 04:05:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:54,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:54,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955301977] [2022-01-19 04:05:54,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955301977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:05:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153410248] [2022-01-19 04:05:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:54,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:05:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:05:54,886 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 04:05:54,887 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 04:05:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:54,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 04:05:54,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:05:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:55,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:05:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:55,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153410248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:05:55,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:05:55,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-19 04:05:55,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593776539] [2022-01-19 04:05:55,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:05:55,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 04:05:55,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 04:05:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-19 04:05:55,340 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:55,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 736 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 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 04:05:55,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:55,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:55,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:55,645 INFO L129 PetriNetUnfolder]: 73/413 cut-off events. [2022-01-19 04:05:55,645 INFO L130 PetriNetUnfolder]: For 2658/2717 co-relation queries the response was YES. [2022-01-19 04:05:55,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 413 events. 73/413 cut-off events. For 2658/2717 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1616 event pairs, 0 based on Foata normal form. 23/395 useless extension candidates. Maximal degree in co-relation 1341. Up to 96 conditions per place. [2022-01-19 04:05:55,648 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 55 selfloop transitions, 25 changer transitions 26/151 dead transitions. [2022-01-19 04:05:55,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1856 flow [2022-01-19 04:05:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-19 04:05:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-19 04:05:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-01-19 04:05:55,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-19 04:05:55,651 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-01-19 04:05:55,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-01-19 04:05:55,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:55,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-01-19 04:05:55,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 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 04:05:55,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 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 04:05:55,657 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 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 04:05:55,657 INFO L186 Difference]: Start difference. First operand has 122 places, 96 transitions, 736 flow. Second operand 25 states and 1450 transitions. [2022-01-19 04:05:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1856 flow [2022-01-19 04:05:55,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1453 flow, removed 180 selfloop flow, removed 13 redundant places. [2022-01-19 04:05:55,665 INFO L242 Difference]: Finished difference. Result has 147 places, 110 transitions, 841 flow [2022-01-19 04:05:55,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=841, PETRI_PLACES=147, PETRI_TRANSITIONS=110} [2022-01-19 04:05:55,666 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 77 predicate places. [2022-01-19 04:05:55,666 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 110 transitions, 841 flow [2022-01-19 04:05:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 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 04:05:55,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:55,666 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-19 04:05:55,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 04:05:55,882 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 04:05:55,883 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-01-19 04:05:55,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:55,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480019935] [2022-01-19 04:05:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:55,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:55,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480019935] [2022-01-19 04:05:55,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480019935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:05:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800936304] [2022-01-19 04:05:55,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 04:05:55,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:05:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:05:55,969 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 04:05:55,970 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 04:05:56,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 04:05:56,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:05:56,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 04:05:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:05:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:56,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:05:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:56,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800936304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:05:56,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:05:56,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-19 04:05:56,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220467930] [2022-01-19 04:05:56,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:05:56,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 04:05:56,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 04:05:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-19 04:05:56,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:56,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 110 transitions, 841 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 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 04:05:56,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:56,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:56,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:56,764 INFO L129 PetriNetUnfolder]: 129/779 cut-off events. [2022-01-19 04:05:56,764 INFO L130 PetriNetUnfolder]: For 12717/12861 co-relation queries the response was YES. [2022-01-19 04:05:56,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 779 events. 129/779 cut-off events. For 12717/12861 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4531 event pairs, 0 based on Foata normal form. 31/731 useless extension candidates. Maximal degree in co-relation 3104. Up to 160 conditions per place. [2022-01-19 04:05:56,772 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 81 changer transitions 26/210 dead transitions. [2022-01-19 04:05:56,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 3273 flow [2022-01-19 04:05:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 04:05:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 04:05:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-01-19 04:05:56,775 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-01-19 04:05:56,775 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-01-19 04:05:56,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-01-19 04:05:56,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:56,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-01-19 04:05:56,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 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 04:05:56,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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 04:05:56,782 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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 04:05:56,782 INFO L186 Difference]: Start difference. First operand has 147 places, 110 transitions, 841 flow. Second operand 33 states and 1915 transitions. [2022-01-19 04:05:56,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 3273 flow [2022-01-19 04:05:56,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2697 flow, removed 280 selfloop flow, removed 13 redundant places. [2022-01-19 04:05:56,799 INFO L242 Difference]: Finished difference. Result has 180 places, 156 transitions, 1674 flow [2022-01-19 04:05:56,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1674, PETRI_PLACES=180, PETRI_TRANSITIONS=156} [2022-01-19 04:05:56,800 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 110 predicate places. [2022-01-19 04:05:56,800 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 156 transitions, 1674 flow [2022-01-19 04:05:56,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 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 04:05:56,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:56,800 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-19 04:05:56,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 04:05:57,017 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 04:05:57,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:57,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2022-01-19 04:05:57,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:57,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788300702] [2022-01-19 04:05:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:57,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:57,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:57,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788300702] [2022-01-19 04:05:57,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788300702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:05:57,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810903083] [2022-01-19 04:05:57,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 04:05:57,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:05:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:05:57,078 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 04:05:57,079 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 04:05:57,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 04:05:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:05:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 04:05:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:05:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:57,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:05:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:05:57,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810903083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:05:57,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:05:57,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-19 04:05:57,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425515989] [2022-01-19 04:05:57,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:05:57,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 04:05:57,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 04:05:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-19 04:05:57,367 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:57,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 156 transitions, 1674 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 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 04:05:57,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:57,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:57,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:57,962 INFO L129 PetriNetUnfolder]: 167/1049 cut-off events. [2022-01-19 04:05:57,963 INFO L130 PetriNetUnfolder]: For 33425/33642 co-relation queries the response was YES. [2022-01-19 04:05:57,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 1049 events. 167/1049 cut-off events. For 33425/33642 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7171 event pairs, 0 based on Foata normal form. 44/987 useless extension candidates. Maximal degree in co-relation 5048. Up to 212 conditions per place. [2022-01-19 04:05:57,974 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 128 changer transitions 31/266 dead transitions. [2022-01-19 04:05:57,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 5247 flow [2022-01-19 04:05:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 04:05:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 04:05:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2022-01-19 04:05:57,977 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-01-19 04:05:57,977 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2022-01-19 04:05:57,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2022-01-19 04:05:57,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:57,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2022-01-19 04:05:57,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 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 04:05:57,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 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 04:05:57,987 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 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 04:05:57,987 INFO L186 Difference]: Start difference. First operand has 180 places, 156 transitions, 1674 flow. Second operand 36 states and 2085 transitions. [2022-01-19 04:05:57,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 5247 flow [2022-01-19 04:05:58,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 4417 flow, removed 399 selfloop flow, removed 18 redundant places. [2022-01-19 04:05:58,032 INFO L242 Difference]: Finished difference. Result has 210 places, 203 transitions, 2651 flow [2022-01-19 04:05:58,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2651, PETRI_PLACES=210, PETRI_TRANSITIONS=203} [2022-01-19 04:05:58,034 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 140 predicate places. [2022-01-19 04:05:58,034 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 203 transitions, 2651 flow [2022-01-19 04:05:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 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 04:05:58,034 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:58,034 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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 04:05:58,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-19 04:05:58,251 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 04:05:58,251 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:05:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:05:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1986094188, now seen corresponding path program 4 times [2022-01-19 04:05:58,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:05:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476717498] [2022-01-19 04:05:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:05:58,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:05:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:05:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:05:58,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:05:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476717498] [2022-01-19 04:05:58,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476717498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:05:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32555548] [2022-01-19 04:05:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 04:05:58,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:05:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:05:58,338 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 04:05:58,339 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 04:05:58,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 04:05:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:05:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 04:05:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:05:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:05:58,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:05:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:05:58,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32555548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:05:58,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:05:58,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-01-19 04:05:58,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236227474] [2022-01-19 04:05:58,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:05:58,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-19 04:05:58,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:05:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-19 04:05:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-01-19 04:05:58,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:05:58,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 203 transitions, 2651 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 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 04:05:58,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:05:58,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:05:58,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:05:59,749 INFO L129 PetriNetUnfolder]: 264/1583 cut-off events. [2022-01-19 04:05:59,749 INFO L130 PetriNetUnfolder]: For 83404/83722 co-relation queries the response was YES. [2022-01-19 04:05:59,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9726 conditions, 1583 events. 264/1583 cut-off events. For 83404/83722 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10973 event pairs, 1 based on Foata normal form. 57/1480 useless extension candidates. Maximal degree in co-relation 9623. Up to 330 conditions per place. [2022-01-19 04:05:59,769 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 222 changer transitions 38/376 dead transitions. [2022-01-19 04:05:59,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 376 transitions, 10583 flow [2022-01-19 04:05:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-19 04:05:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-01-19 04:05:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3011 transitions. [2022-01-19 04:05:59,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271978021978021 [2022-01-19 04:05:59,772 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3011 transitions. [2022-01-19 04:05:59,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3011 transitions. [2022-01-19 04:05:59,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:05:59,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3011 transitions. [2022-01-19 04:05:59,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.90384615384615) internal successors, (3011), 52 states have internal predecessors, (3011), 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 04:05:59,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 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 04:05:59,782 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 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 04:05:59,782 INFO L186 Difference]: Start difference. First operand has 210 places, 203 transitions, 2651 flow. Second operand 52 states and 3011 transitions. [2022-01-19 04:05:59,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 376 transitions, 10583 flow [2022-01-19 04:05:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 376 transitions, 8479 flow, removed 1021 selfloop flow, removed 21 redundant places. [2022-01-19 04:05:59,853 INFO L242 Difference]: Finished difference. Result has 263 places, 313 transitions, 5525 flow [2022-01-19 04:05:59,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5525, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2022-01-19 04:05:59,854 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 193 predicate places. [2022-01-19 04:05:59,854 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 5525 flow [2022-01-19 04:05:59,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 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 04:05:59,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:05:59,854 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:59,872 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 04:06:00,071 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 04:06:00,072 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash -285761002, now seen corresponding path program 5 times [2022-01-19 04:06:00,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:00,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792062750] [2022-01-19 04:06:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:00,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:00,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792062750] [2022-01-19 04:06:00,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792062750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524623861] [2022-01-19 04:06:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 04:06:00,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:00,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:00,304 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 04:06:00,305 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 04:06:00,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-19 04:06:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 04:06:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:00,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:01,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524623861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:01,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:01,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2022-01-19 04:06:01,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198631414] [2022-01-19 04:06:01,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:01,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-19 04:06:01,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-19 04:06:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-01-19 04:06:01,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:01,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 5525 flow. Second operand has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 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 04:06:01,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:01,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:01,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:01,987 INFO L129 PetriNetUnfolder]: 274/1803 cut-off events. [2022-01-19 04:06:01,987 INFO L130 PetriNetUnfolder]: For 125520/125685 co-relation queries the response was YES. [2022-01-19 04:06:02,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 1803 events. 274/1803 cut-off events. For 125520/125685 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12412 event pairs, 0 based on Foata normal form. 28/1637 useless extension candidates. Maximal degree in co-relation 11114. Up to 372 conditions per place. [2022-01-19 04:06:02,014 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 271 selfloop transitions, 47 changer transitions 26/389 dead transitions. [2022-01-19 04:06:02,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 389 transitions, 10759 flow [2022-01-19 04:06:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 04:06:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 04:06:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2022-01-19 04:06:02,016 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2022-01-19 04:06:02,016 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2022-01-19 04:06:02,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2022-01-19 04:06:02,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:02,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2022-01-19 04:06:02,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 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 04:06:02,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 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 04:06:02,023 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 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 04:06:02,023 INFO L186 Difference]: Start difference. First operand has 263 places, 313 transitions, 5525 flow. Second operand 37 states and 2134 transitions. [2022-01-19 04:06:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 389 transitions, 10759 flow [2022-01-19 04:06:02,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 389 transitions, 7120 flow, removed 1795 selfloop flow, removed 20 redundant places. [2022-01-19 04:06:02,181 INFO L242 Difference]: Finished difference. Result has 285 places, 331 transitions, 4313 flow [2022-01-19 04:06:02,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4313, PETRI_PLACES=285, PETRI_TRANSITIONS=331} [2022-01-19 04:06:02,182 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 215 predicate places. [2022-01-19 04:06:02,182 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 331 transitions, 4313 flow [2022-01-19 04:06:02,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 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 04:06:02,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:02,183 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:06:02,202 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 04:06:02,400 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 04:06:02,400 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash -983699664, now seen corresponding path program 6 times [2022-01-19 04:06:02,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:02,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272391751] [2022-01-19 04:06:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:02,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:02,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272391751] [2022-01-19 04:06:02,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272391751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104457849] [2022-01-19 04:06:02,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 04:06:02,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:02,656 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 04:06:02,657 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 04:06:02,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-19 04:06:02,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 04:06:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:03,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:03,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104457849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:03,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:03,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2022-01-19 04:06:03,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271638873] [2022-01-19 04:06:03,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:03,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 04:06:03,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:03,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 04:06:03,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-19 04:06:03,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:03,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 331 transitions, 4313 flow. Second operand has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 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 04:06:03,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:03,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:03,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:04,404 INFO L129 PetriNetUnfolder]: 332/2277 cut-off events. [2022-01-19 04:06:04,404 INFO L130 PetriNetUnfolder]: For 122119/122479 co-relation queries the response was YES. [2022-01-19 04:06:04,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 2277 events. 332/2277 cut-off events. For 122119/122479 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16998 event pairs, 0 based on Foata normal form. 42/2077 useless extension candidates. Maximal degree in co-relation 11378. Up to 340 conditions per place. [2022-01-19 04:06:04,433 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 235 selfloop transitions, 169 changer transitions 26/475 dead transitions. [2022-01-19 04:06:04,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 475 transitions, 9585 flow [2022-01-19 04:06:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-19 04:06:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-19 04:06:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2022-01-19 04:06:04,435 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2022-01-19 04:06:04,435 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2022-01-19 04:06:04,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2022-01-19 04:06:04,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:04,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2022-01-19 04:06:04,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 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 04:06:04,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 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 04:06:04,442 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 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 04:06:04,442 INFO L186 Difference]: Start difference. First operand has 285 places, 331 transitions, 4313 flow. Second operand 45 states and 2593 transitions. [2022-01-19 04:06:04,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 475 transitions, 9585 flow [2022-01-19 04:06:04,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 475 transitions, 8826 flow, removed 354 selfloop flow, removed 23 redundant places. [2022-01-19 04:06:04,596 INFO L242 Difference]: Finished difference. Result has 318 places, 388 transitions, 5550 flow [2022-01-19 04:06:04,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5550, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2022-01-19 04:06:04,597 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 248 predicate places. [2022-01-19 04:06:04,597 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 5550 flow [2022-01-19 04:06:04,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 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 04:06:04,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:04,597 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:06:04,617 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 04:06:04,811 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 04:06:04,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1731536892, now seen corresponding path program 7 times [2022-01-19 04:06:04,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:04,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568453516] [2022-01-19 04:06:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:04,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:05,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:05,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568453516] [2022-01-19 04:06:05,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568453516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:05,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685444586] [2022-01-19 04:06:05,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 04:06:05,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:05,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:05,016 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 04:06:05,017 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 04:06:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 04:06:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:05,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:05,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685444586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:05,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:05,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-01-19 04:06:05,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309570008] [2022-01-19 04:06:05,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:05,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 04:06:05,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:05,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 04:06:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 04:06:05,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:05,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 5550 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 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 04:06:05,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:05,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:05,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:07,236 INFO L129 PetriNetUnfolder]: 397/2805 cut-off events. [2022-01-19 04:06:07,236 INFO L130 PetriNetUnfolder]: For 184595/184879 co-relation queries the response was YES. [2022-01-19 04:06:07,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 2805 events. 397/2805 cut-off events. For 184595/184879 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 22325 event pairs, 0 based on Foata normal form. 51/2560 useless extension candidates. Maximal degree in co-relation 15027. Up to 416 conditions per place. [2022-01-19 04:06:07,274 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 122 selfloop transitions, 348 changer transitions 26/541 dead transitions. [2022-01-19 04:06:07,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 541 transitions, 12338 flow [2022-01-19 04:06:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 04:06:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 04:06:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2022-01-19 04:06:07,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2022-01-19 04:06:07,279 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2022-01-19 04:06:07,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2022-01-19 04:06:07,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:07,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2022-01-19 04:06:07,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 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 04:06:07,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 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 04:06:07,287 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 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 04:06:07,287 INFO L186 Difference]: Start difference. First operand has 318 places, 388 transitions, 5550 flow. Second operand 51 states and 2942 transitions. [2022-01-19 04:06:07,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 541 transitions, 12338 flow [2022-01-19 04:06:07,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 541 transitions, 11012 flow, removed 576 selfloop flow, removed 31 redundant places. [2022-01-19 04:06:07,518 INFO L242 Difference]: Finished difference. Result has 352 places, 458 transitions, 7401 flow [2022-01-19 04:06:07,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7401, PETRI_PLACES=352, PETRI_TRANSITIONS=458} [2022-01-19 04:06:07,519 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 282 predicate places. [2022-01-19 04:06:07,519 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 458 transitions, 7401 flow [2022-01-19 04:06:07,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 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 04:06:07,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:07,520 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:06:07,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:07,723 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 04:06:07,724 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -693522108, now seen corresponding path program 8 times [2022-01-19 04:06:07,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182961733] [2022-01-19 04:06:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:07,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 04:06:07,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182961733] [2022-01-19 04:06:07,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182961733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936254022] [2022-01-19 04:06:07,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 04:06:07,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:07,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:07,905 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 04:06:07,905 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 04:06:07,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 04:06:07,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 04:06:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 04:06:08,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 04:06:08,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936254022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:08,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:08,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-01-19 04:06:08,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25583715] [2022-01-19 04:06:08,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-19 04:06:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-19 04:06:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2022-01-19 04:06:08,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:08,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 458 transitions, 7401 flow. Second operand has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 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 04:06:08,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:08,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:08,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:10,131 INFO L129 PetriNetUnfolder]: 494/3392 cut-off events. [2022-01-19 04:06:10,131 INFO L130 PetriNetUnfolder]: For 296375/296794 co-relation queries the response was YES. [2022-01-19 04:06:10,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20583 conditions, 3392 events. 494/3392 cut-off events. For 296375/296794 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 27950 event pairs, 0 based on Foata normal form. 65/3099 useless extension candidates. Maximal degree in co-relation 20421. Up to 510 conditions per place. [2022-01-19 04:06:10,175 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 125 selfloop transitions, 443 changer transitions 26/639 dead transitions. [2022-01-19 04:06:10,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 639 transitions, 15782 flow [2022-01-19 04:06:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 04:06:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 04:06:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3356 transitions. [2022-01-19 04:06:10,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8266009852216749 [2022-01-19 04:06:10,178 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3356 transitions. [2022-01-19 04:06:10,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3356 transitions. [2022-01-19 04:06:10,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:10,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3356 transitions. [2022-01-19 04:06:10,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 57.86206896551724) internal successors, (3356), 58 states have internal predecessors, (3356), 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 04:06:10,185 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 04:06:10,185 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 04:06:10,186 INFO L186 Difference]: Start difference. First operand has 352 places, 458 transitions, 7401 flow. Second operand 58 states and 3356 transitions. [2022-01-19 04:06:10,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 639 transitions, 15782 flow [2022-01-19 04:06:10,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 639 transitions, 13590 flow, removed 1047 selfloop flow, removed 22 redundant places. [2022-01-19 04:06:10,483 INFO L242 Difference]: Finished difference. Result has 403 places, 538 transitions, 9409 flow [2022-01-19 04:06:10,483 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9409, PETRI_PLACES=403, PETRI_TRANSITIONS=538} [2022-01-19 04:06:10,484 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 333 predicate places. [2022-01-19 04:06:10,484 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 538 transitions, 9409 flow [2022-01-19 04:06:10,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 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 04:06:10,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:10,484 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:06:10,504 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 04:06:10,699 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 04:06:10,699 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1774382462, now seen corresponding path program 9 times [2022-01-19 04:06:10,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:10,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364287352] [2022-01-19 04:06:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:10,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:10,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:10,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364287352] [2022-01-19 04:06:10,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364287352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:10,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379363933] [2022-01-19 04:06:10,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 04:06:10,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:10,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:10,917 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 04:06:10,920 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 04:06:10,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-19 04:06:10,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-19 04:06:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:11,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 04:06:11,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379363933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:11,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2022-01-19 04:06:11,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262312419] [2022-01-19 04:06:11,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:11,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-19 04:06:11,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-19 04:06:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-01-19 04:06:11,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:11,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 538 transitions, 9409 flow. Second operand has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 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 04:06:11,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:11,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:11,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:12,882 INFO L129 PetriNetUnfolder]: 518/3513 cut-off events. [2022-01-19 04:06:12,883 INFO L130 PetriNetUnfolder]: For 363973/364322 co-relation queries the response was YES. [2022-01-19 04:06:12,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23062 conditions, 3513 events. 518/3513 cut-off events. For 363973/364322 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29048 event pairs, 1 based on Foata normal form. 73/3217 useless extension candidates. Maximal degree in co-relation 22883. Up to 544 conditions per place. [2022-01-19 04:06:12,932 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 104 selfloop transitions, 455 changer transitions 14/618 dead transitions. [2022-01-19 04:06:12,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 15889 flow [2022-01-19 04:06:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 04:06:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 04:06:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2022-01-19 04:06:12,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8248571428571428 [2022-01-19 04:06:12,934 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2022-01-19 04:06:12,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2022-01-19 04:06:12,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:12,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2022-01-19 04:06:12,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 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 04:06:12,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 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 04:06:12,940 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 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 04:06:12,940 INFO L186 Difference]: Start difference. First operand has 403 places, 538 transitions, 9409 flow. Second operand 50 states and 2887 transitions. [2022-01-19 04:06:12,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 15889 flow [2022-01-19 04:06:13,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 618 transitions, 13835 flow, removed 776 selfloop flow, removed 38 redundant places. [2022-01-19 04:06:13,337 INFO L242 Difference]: Finished difference. Result has 418 places, 561 transitions, 10008 flow [2022-01-19 04:06:13,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10008, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2022-01-19 04:06:13,338 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 348 predicate places. [2022-01-19 04:06:13,338 INFO L470 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 10008 flow [2022-01-19 04:06:13,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 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 04:06:13,339 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:13,339 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:06:13,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:13,552 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 04:06:13,552 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -341929228, now seen corresponding path program 10 times [2022-01-19 04:06:13,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:13,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654668004] [2022-01-19 04:06:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:13,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:13,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:13,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654668004] [2022-01-19 04:06:13,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654668004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994450255] [2022-01-19 04:06:13,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 04:06:13,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:13,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:13,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:13,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 04:06:13,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 04:06:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-19 04:06:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:14,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 04:06:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 04:06:14,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994450255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 04:06:14,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 04:06:14,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2022-01-19 04:06:14,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402524090] [2022-01-19 04:06:14,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 04:06:14,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-19 04:06:14,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-19 04:06:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-01-19 04:06:14,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-19 04:06:14,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 10008 flow. Second operand has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 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 04:06:14,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:14,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-19 04:06:14,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:16,036 INFO L129 PetriNetUnfolder]: 513/3563 cut-off events. [2022-01-19 04:06:16,036 INFO L130 PetriNetUnfolder]: For 392835/393119 co-relation queries the response was YES. [2022-01-19 04:06:16,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23441 conditions, 3563 events. 513/3563 cut-off events. For 392835/393119 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29666 event pairs, 0 based on Foata normal form. 89/3278 useless extension candidates. Maximal degree in co-relation 23259. Up to 540 conditions per place. [2022-01-19 04:06:16,171 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 115 selfloop transitions, 484 changer transitions 31/675 dead transitions. [2022-01-19 04:06:16,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 675 transitions, 17970 flow [2022-01-19 04:06:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 04:06:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 04:06:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3405 transitions. [2022-01-19 04:06:16,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8244552058111381 [2022-01-19 04:06:16,174 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3405 transitions. [2022-01-19 04:06:16,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3405 transitions. [2022-01-19 04:06:16,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:16,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3405 transitions. [2022-01-19 04:06:16,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.71186440677966) internal successors, (3405), 59 states have internal predecessors, (3405), 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 04:06:16,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 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 04:06:16,180 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 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 04:06:16,181 INFO L186 Difference]: Start difference. First operand has 418 places, 561 transitions, 10008 flow. Second operand 59 states and 3405 transitions. [2022-01-19 04:06:16,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 675 transitions, 17970 flow [2022-01-19 04:06:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 675 transitions, 16525 flow, removed 558 selfloop flow, removed 24 redundant places. [2022-01-19 04:06:16,646 INFO L242 Difference]: Finished difference. Result has 464 places, 574 transitions, 11051 flow [2022-01-19 04:06:16,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=11051, PETRI_PLACES=464, PETRI_TRANSITIONS=574} [2022-01-19 04:06:16,648 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 394 predicate places. [2022-01-19 04:06:16,648 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 574 transitions, 11051 flow [2022-01-19 04:06:16,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 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 04:06:16,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 04:06:16,649 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:06:16,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:16,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 04:06:16,855 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 04:06:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 04:06:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1673947068, now seen corresponding path program 11 times [2022-01-19 04:06:16,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 04:06:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919956347] [2022-01-19 04:06:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 04:06:16,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 04:06:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 04:06:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 368 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 04:06:17,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 04:06:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919956347] [2022-01-19 04:06:17,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919956347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 04:06:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064316320] [2022-01-19 04:06:17,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 04:06:17,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 04:06:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 04:06:17,025 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 04:06:17,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 04:06:17,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-19 04:06:17,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 04:06:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 04:06:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 04:06:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 04:06:17,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 04:06:17,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064316320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 04:06:17,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 04:06:17,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2022-01-19 04:06:17,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396950252] [2022-01-19 04:06:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 04:06:17,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 04:06:17,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 04:06:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 04:06:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-01-19 04:06:17,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-01-19 04:06:17,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 574 transitions, 11051 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 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 04:06:17,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 04:06:17,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-01-19 04:06:17,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 04:06:21,561 INFO L129 PetriNetUnfolder]: 2729/14107 cut-off events. [2022-01-19 04:06:21,561 INFO L130 PetriNetUnfolder]: For 1261836/1262063 co-relation queries the response was YES. [2022-01-19 04:06:21,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83067 conditions, 14107 events. 2729/14107 cut-off events. For 1261836/1262063 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 167496 event pairs, 648 based on Foata normal form. 79/12622 useless extension candidates. Maximal degree in co-relation 82906. Up to 1994 conditions per place. [2022-01-19 04:06:21,821 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 614/614 dead transitions. [2022-01-19 04:06:21,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 614 transitions, 9999 flow [2022-01-19 04:06:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 04:06:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 04:06:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2022-01-19 04:06:21,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2022-01-19 04:06:21,822 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2022-01-19 04:06:21,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2022-01-19 04:06:21,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 04:06:21,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2022-01-19 04:06:21,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 states have internal predecessors, (2000), 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 04:06:21,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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 04:06:21,826 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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 04:06:21,826 INFO L186 Difference]: Start difference. First operand has 464 places, 574 transitions, 11051 flow. Second operand 33 states and 2000 transitions. [2022-01-19 04:06:21,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 614 transitions, 9999 flow [2022-01-19 04:06:22,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 614 transitions, 8386 flow, removed 197 selfloop flow, removed 73 redundant places. [2022-01-19 04:06:22,596 INFO L242 Difference]: Finished difference. Result has 407 places, 0 transitions, 0 flow [2022-01-19 04:06:22,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=407, PETRI_TRANSITIONS=0} [2022-01-19 04:06:22,597 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 337 predicate places. [2022-01-19 04:06:22,597 INFO L470 AbstractCegarLoop]: Abstraction has has 407 places, 0 transitions, 0 flow [2022-01-19 04:06:22,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 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 04:06:22,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 04:06:22,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 04:06:22,599 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 04:06:22,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 04:06:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 04:06:22,803 INFO L732 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1] [2022-01-19 04:06:22,804 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 04:06:22,804 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 04:06:22,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 04:06:22 BasicIcfg [2022-01-19 04:06:22,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 04:06:22,806 INFO L158 Benchmark]: Toolchain (without parser) took 31373.32ms. Allocated memory was 356.5MB in the beginning and 3.0GB in the end (delta: 2.7GB). Free memory was 299.5MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2022-01-19 04:06:22,806 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 356.5MB. Free memory was 316.8MB in the beginning and 316.7MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 04:06:22,806 INFO L158 Benchmark]: CACSL2BoogieTranslator took 357.83ms. Allocated memory was 356.5MB in the beginning and 427.8MB in the end (delta: 71.3MB). Free memory was 299.2MB in the beginning and 390.1MB in the end (delta: -90.9MB). Peak memory consumption was 11.4MB. Max. memory is 16.0GB. [2022-01-19 04:06:22,807 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.75ms. Allocated memory is still 427.8MB. Free memory was 390.1MB in the beginning and 388.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 04:06:22,807 INFO L158 Benchmark]: Boogie Preprocessor took 29.66ms. Allocated memory is still 427.8MB. Free memory was 388.0MB in the beginning and 387.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 04:06:22,807 INFO L158 Benchmark]: RCFGBuilder took 273.96ms. Allocated memory is still 427.8MB. Free memory was 387.0MB in the beginning and 373.3MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-19 04:06:22,807 INFO L158 Benchmark]: TraceAbstraction took 30663.38ms. Allocated memory was 427.8MB in the beginning and 3.0GB in the end (delta: 2.6GB). Free memory was 373.3MB in the beginning and 2.1GB in the end (delta: -1.7GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2022-01-19 04:06:22,808 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 356.5MB. Free memory was 316.8MB in the beginning and 316.7MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 357.83ms. Allocated memory was 356.5MB in the beginning and 427.8MB in the end (delta: 71.3MB). Free memory was 299.2MB in the beginning and 390.1MB in the end (delta: -90.9MB). Peak memory consumption was 11.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.75ms. Allocated memory is still 427.8MB. Free memory was 390.1MB in the beginning and 388.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.66ms. Allocated memory is still 427.8MB. Free memory was 388.0MB in the beginning and 387.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 273.96ms. Allocated memory is still 427.8MB. Free memory was 387.0MB in the beginning and 373.3MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 30663.38ms. Allocated memory was 427.8MB in the beginning and 3.0GB in the end (delta: 2.6GB). Free memory was 373.3MB in the beginning and 2.1GB in the end (delta: -1.7GB). Peak memory consumption was 1.1GB. 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: 30.6s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 18.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1063 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1063 mSDsluCounter, 312 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 1624 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2890 IncrementalHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1624 mSolverCounterUnsat, 87 mSDtfsCounter, 2890 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2934 GetRequests, 2184 SyntacticMatches, 2 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11982 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11051occurred in iteration=17, InterpolantAutomatonStates: 558, 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, 8.0s InterpolantComputationTime, 2640 NumberOfCodeBlocks, 2635 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3662 ConstructedInterpolants, 0 QuantifiedInterpolants, 14332 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2624 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/7204 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 04:06:22,830 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...