/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/weaver/parallel-misc-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 07:37:12,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 07:37:12,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 07:37:12,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 07:37:12,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 07:37:12,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 07:37:12,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 07:37:12,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 07:37:12,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 07:37:12,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 07:37:12,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 07:37:12,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 07:37:12,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 07:37:12,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 07:37:12,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 07:37:12,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 07:37:12,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 07:37:12,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 07:37:12,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 07:37:12,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 07:37:12,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 07:37:12,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 07:37:12,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 07:37:12,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 07:37:12,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-19 07:37:12,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 07:37:12,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 07:37:12,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 07:37:12,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 07:37:12,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 07:37:12,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 07:37:12,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 07:37:12,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 07:37:12,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 07:37:12,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 07:37:12,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 07:37:12,181 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 07:37:12,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 07:37:12,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 07:37:12,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 07:37:12,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 07:37:12,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 07:37:12,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 07:37:12,210 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 07:37:12,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 07:37:12,211 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 07:37:12,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 07:37:12,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 07:37:12,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 07:37:12,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 07:37:12,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 07:37:12,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 07:37:12,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 07:37:12,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 07:37:12,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:37:12,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 07:37:12,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 07:37:12,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 07:37:12,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 07:37:12,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 07:37:12,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 07:37:12,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 07:37:12,215 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 07:37:12,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 07:37:12,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 07:37:12,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 07:37:12,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 07:37:12,462 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 07:37:12,463 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 07:37:12,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2022-01-19 07:37:12,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdedb6da3/78ff4b2749934a5681906f1cbd1fba99/FLAGfbfb2211c [2022-01-19 07:37:12,860 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 07:37:12,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2022-01-19 07:37:12,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdedb6da3/78ff4b2749934a5681906f1cbd1fba99/FLAGfbfb2211c [2022-01-19 07:37:13,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdedb6da3/78ff4b2749934a5681906f1cbd1fba99 [2022-01-19 07:37:13,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 07:37:13,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 07:37:13,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 07:37:13,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 07:37:13,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 07:37:13,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dafb68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13, skipping insertion in model container [2022-01-19 07:37:13,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 07:37:13,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 07:37:13,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2554,2567] [2022-01-19 07:37:13,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:37:13,482 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 07:37:13,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2554,2567] [2022-01-19 07:37:13,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:37:13,527 INFO L208 MainTranslator]: Completed translation [2022-01-19 07:37:13,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13 WrapperNode [2022-01-19 07:37:13,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 07:37:13,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 07:37:13,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 07:37:13,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 07:37:13,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,571 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-01-19 07:37:13,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 07:37:13,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 07:37:13,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 07:37:13,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 07:37:13,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 07:37:13,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 07:37:13,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 07:37:13,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 07:37:13,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (1/1) ... [2022-01-19 07:37:13,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:37:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:13,636 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 07:37:13,662 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 07:37:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 07:37:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 07:37:13,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 07:37:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 07:37:13,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 07:37:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 07:37:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 07:37:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 07:37:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 07:37:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 07:37:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 07:37:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 07:37:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 07:37:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 07:37:13,686 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 07:37:13,769 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 07:37:13,770 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 07:37:13,990 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 07:37:14,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 07:37:14,007 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 07:37:14,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:37:14 BoogieIcfgContainer [2022-01-19 07:37:14,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 07:37:14,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 07:37:14,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 07:37:14,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 07:37:14,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 07:37:13" (1/3) ... [2022-01-19 07:37:14,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262767a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:37:14, skipping insertion in model container [2022-01-19 07:37:14,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:13" (2/3) ... [2022-01-19 07:37:14,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262767a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:37:14, skipping insertion in model container [2022-01-19 07:37:14,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:37:14" (3/3) ... [2022-01-19 07:37:14,016 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2022-01-19 07:37:14,021 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 07:37:14,021 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 07:37:14,022 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 07:37:14,056 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,056 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,056 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,057 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,062 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,062 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,062 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,062 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,063 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,063 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,063 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,063 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,064 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,064 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,065 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,065 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,065 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,065 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,072 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,072 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,072 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:14,075 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 07:37:14,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 07:37:14,123 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 07:37:14,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 07:37:14,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2022-01-19 07:37:14,177 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2022-01-19 07:37:14,178 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 07:37:14,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-01-19 07:37:14,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2022-01-19 07:37:14,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2022-01-19 07:37:14,204 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2022-01-19 07:37:14,204 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 07:37:14,205 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:14,205 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, 1, 1, 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 07:37:14,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1147510984, now seen corresponding path program 1 times [2022-01-19 07:37:14,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976577694] [2022-01-19 07:37:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:14,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:14,666 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 07:37:14,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976577694] [2022-01-19 07:37:14,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976577694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:14,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:14,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-19 07:37:14,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231477944] [2022-01-19 07:37:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:14,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 07:37:14,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 07:37:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-19 07:37:14,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-01-19 07:37:14,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 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 07:37:14,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:14,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-01-19 07:37:14,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:15,051 INFO L129 PetriNetUnfolder]: 83/278 cut-off events. [2022-01-19 07:37:15,051 INFO L130 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2022-01-19 07:37:15,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 278 events. 83/278 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1032 event pairs, 23 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 320. Up to 121 conditions per place. [2022-01-19 07:37:15,056 INFO L132 encePairwiseOnDemand]: 86/104 looper letters, 31 selfloop transitions, 9 changer transitions 7/104 dead transitions. [2022-01-19 07:37:15,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 323 flow [2022-01-19 07:37:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:37:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:37:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2022-01-19 07:37:15,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971153846153846 [2022-01-19 07:37:15,087 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2022-01-19 07:37:15,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2022-01-19 07:37:15,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:15,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2022-01-19 07:37:15,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.5) internal successors, (725), 10 states have internal predecessors, (725), 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 07:37:15,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:15,117 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:15,118 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 10 states and 725 transitions. [2022-01-19 07:37:15,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 323 flow [2022-01-19 07:37:15,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 07:37:15,152 INFO L242 Difference]: Finished difference. Result has 100 places, 91 transitions, 223 flow [2022-01-19 07:37:15,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2022-01-19 07:37:15,162 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2022-01-19 07:37:15,162 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 223 flow [2022-01-19 07:37:15,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 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 07:37:15,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:15,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:15,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 07:37:15,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472794, now seen corresponding path program 1 times [2022-01-19 07:37:15,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:15,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107794840] [2022-01-19 07:37:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:15,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:15,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107794840] [2022-01-19 07:37:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107794840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:15,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:15,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:37:15,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176059565] [2022-01-19 07:37:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:15,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:37:15,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:37:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:37:15,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-01-19 07:37:15,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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 07:37:15,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:15,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-01-19 07:37:15,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:15,648 INFO L129 PetriNetUnfolder]: 87/304 cut-off events. [2022-01-19 07:37:15,648 INFO L130 PetriNetUnfolder]: For 40/48 co-relation queries the response was YES. [2022-01-19 07:37:15,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 304 events. 87/304 cut-off events. For 40/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1233 event pairs, 10 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 527. Up to 74 conditions per place. [2022-01-19 07:37:15,651 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 43 selfloop transitions, 15 changer transitions 4/123 dead transitions. [2022-01-19 07:37:15,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 434 flow [2022-01-19 07:37:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:37:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:37:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 542 transitions. [2022-01-19 07:37:15,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7445054945054945 [2022-01-19 07:37:15,656 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 542 transitions. [2022-01-19 07:37:15,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 542 transitions. [2022-01-19 07:37:15,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:15,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 542 transitions. [2022-01-19 07:37:15,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 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 07:37:15,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 07:37:15,663 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 07:37:15,663 INFO L186 Difference]: Start difference. First operand has 100 places, 91 transitions, 223 flow. Second operand 7 states and 542 transitions. [2022-01-19 07:37:15,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 434 flow [2022-01-19 07:37:15,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 415 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-01-19 07:37:15,667 INFO L242 Difference]: Finished difference. Result has 97 places, 98 transitions, 279 flow [2022-01-19 07:37:15,667 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2022-01-19 07:37:15,668 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2022-01-19 07:37:15,668 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 279 flow [2022-01-19 07:37:15,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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 07:37:15,669 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:15,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:15,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 07:37:15,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:15,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1489782240, now seen corresponding path program 2 times [2022-01-19 07:37:15,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:15,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661682450] [2022-01-19 07:37:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:15,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:15,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:15,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661682450] [2022-01-19 07:37:15,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661682450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:15,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:15,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:37:15,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712546898] [2022-01-19 07:37:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:15,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:37:15,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:37:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:37:15,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-01-19 07:37:15,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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 07:37:15,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:15,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-01-19 07:37:15,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:16,024 INFO L129 PetriNetUnfolder]: 84/308 cut-off events. [2022-01-19 07:37:16,025 INFO L130 PetriNetUnfolder]: For 126/130 co-relation queries the response was YES. [2022-01-19 07:37:16,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 308 events. 84/308 cut-off events. For 126/130 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1269 event pairs, 13 based on Foata normal form. 7/295 useless extension candidates. Maximal degree in co-relation 326. Up to 48 conditions per place. [2022-01-19 07:37:16,030 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 39 selfloop transitions, 16 changer transitions 4/120 dead transitions. [2022-01-19 07:37:16,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 120 transitions, 482 flow [2022-01-19 07:37:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:37:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:37:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2022-01-19 07:37:16,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2022-01-19 07:37:16,033 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2022-01-19 07:37:16,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2022-01-19 07:37:16,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:16,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2022-01-19 07:37:16,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 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 07:37:16,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 07:37:16,038 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 07:37:16,038 INFO L186 Difference]: Start difference. First operand has 97 places, 98 transitions, 279 flow. Second operand 7 states and 536 transitions. [2022-01-19 07:37:16,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 120 transitions, 482 flow [2022-01-19 07:37:16,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 120 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 07:37:16,046 INFO L242 Difference]: Finished difference. Result has 105 places, 103 transitions, 373 flow [2022-01-19 07:37:16,046 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2022-01-19 07:37:16,048 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2022-01-19 07:37:16,049 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 373 flow [2022-01-19 07:37:16,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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 07:37:16,049 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:16,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:16,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 07:37:16,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:16,054 INFO L85 PathProgramCache]: Analyzing trace with hash 256466347, now seen corresponding path program 1 times [2022-01-19 07:37:16,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932537723] [2022-01-19 07:37:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:16,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:16,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932537723] [2022-01-19 07:37:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932537723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613265832] [2022-01-19 07:37:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:16,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:16,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:16,229 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 07:37:16,234 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 07:37:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 07:37:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:17,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613265832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:17,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:17,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-19 07:37:17,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308680565] [2022-01-19 07:37:17,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:17,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 07:37:17,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 07:37:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-19 07:37:17,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-01-19 07:37:17,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 373 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 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 07:37:17,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:17,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-01-19 07:37:17,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:17,536 INFO L129 PetriNetUnfolder]: 105/399 cut-off events. [2022-01-19 07:37:17,536 INFO L130 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2022-01-19 07:37:17,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 399 events. 105/399 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1805 event pairs, 6 based on Foata normal form. 9/382 useless extension candidates. Maximal degree in co-relation 501. Up to 65 conditions per place. [2022-01-19 07:37:17,540 INFO L132 encePairwiseOnDemand]: 95/104 looper letters, 66 selfloop transitions, 13 changer transitions 3/143 dead transitions. [2022-01-19 07:37:17,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 733 flow [2022-01-19 07:37:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 07:37:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 07:37:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 692 transitions. [2022-01-19 07:37:17,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7393162393162394 [2022-01-19 07:37:17,542 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 692 transitions. [2022-01-19 07:37:17,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 692 transitions. [2022-01-19 07:37:17,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:17,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 692 transitions. [2022-01-19 07:37:17,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.88888888888889) internal successors, (692), 9 states have internal predecessors, (692), 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 07:37:17,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 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 07:37:17,546 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 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 07:37:17,546 INFO L186 Difference]: Start difference. First operand has 105 places, 103 transitions, 373 flow. Second operand 9 states and 692 transitions. [2022-01-19 07:37:17,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 733 flow [2022-01-19 07:37:17,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 721 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-01-19 07:37:17,552 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 452 flow [2022-01-19 07:37:17,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2022-01-19 07:37:17,553 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2022-01-19 07:37:17,553 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 452 flow [2022-01-19 07:37:17,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 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 07:37:17,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:17,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:17,578 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 07:37:17,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:17,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -995906079, now seen corresponding path program 2 times [2022-01-19 07:37:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823105430] [2022-01-19 07:37:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:17,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:17,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823105430] [2022-01-19 07:37:17,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823105430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:17,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:17,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:37:17,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015186280] [2022-01-19 07:37:17,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:17,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:37:17,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:17,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:37:17,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:37:17,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-01-19 07:37:17,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 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 07:37:17,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:17,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-01-19 07:37:17,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:18,006 INFO L129 PetriNetUnfolder]: 104/382 cut-off events. [2022-01-19 07:37:18,007 INFO L130 PetriNetUnfolder]: For 666/666 co-relation queries the response was YES. [2022-01-19 07:37:18,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 382 events. 104/382 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1676 event pairs, 9 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 695. Up to 105 conditions per place. [2022-01-19 07:37:18,010 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 48 selfloop transitions, 14 changer transitions 3/126 dead transitions. [2022-01-19 07:37:18,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 673 flow [2022-01-19 07:37:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:37:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:37:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 532 transitions. [2022-01-19 07:37:18,012 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2022-01-19 07:37:18,012 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 532 transitions. [2022-01-19 07:37:18,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 532 transitions. [2022-01-19 07:37:18,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:18,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 532 transitions. [2022-01-19 07:37:18,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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 07:37:18,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 07:37:18,015 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 07:37:18,015 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 452 flow. Second operand 7 states and 532 transitions. [2022-01-19 07:37:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 673 flow [2022-01-19 07:37:18,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 126 transitions, 646 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-01-19 07:37:18,020 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 489 flow [2022-01-19 07:37:18,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2022-01-19 07:37:18,021 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2022-01-19 07:37:18,021 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 489 flow [2022-01-19 07:37:18,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 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 07:37:18,022 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:18,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:18,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 07:37:18,022 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1643762059, now seen corresponding path program 1 times [2022-01-19 07:37:18,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:18,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257863302] [2022-01-19 07:37:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:18,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:18,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257863302] [2022-01-19 07:37:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257863302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225610181] [2022-01-19 07:37:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:18,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:18,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:18,201 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 07:37:18,224 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 07:37:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 07:37:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:18,644 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 07:37:18,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:19,181 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 07:37:19,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225610181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:19,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-19 07:37:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119297654] [2022-01-19 07:37:19,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 07:37:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 07:37:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-19 07:37:19,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-01-19 07:37:19,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 489 flow. Second operand has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 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 07:37:19,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:19,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-01-19 07:37:19,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:21,055 INFO L129 PetriNetUnfolder]: 313/843 cut-off events. [2022-01-19 07:37:21,056 INFO L130 PetriNetUnfolder]: For 1964/1964 co-relation queries the response was YES. [2022-01-19 07:37:21,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2390 conditions, 843 events. 313/843 cut-off events. For 1964/1964 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4233 event pairs, 5 based on Foata normal form. 29/817 useless extension candidates. Maximal degree in co-relation 1847. Up to 182 conditions per place. [2022-01-19 07:37:21,065 INFO L132 encePairwiseOnDemand]: 87/104 looper letters, 139 selfloop transitions, 83 changer transitions 0/281 dead transitions. [2022-01-19 07:37:21,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 281 transitions, 1913 flow [2022-01-19 07:37:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 07:37:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 07:37:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3031 transitions. [2022-01-19 07:37:21,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6939102564102564 [2022-01-19 07:37:21,072 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3031 transitions. [2022-01-19 07:37:21,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3031 transitions. [2022-01-19 07:37:21,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:21,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3031 transitions. [2022-01-19 07:37:21,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.16666666666667) internal successors, (3031), 42 states have internal predecessors, (3031), 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 07:37:21,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 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 07:37:21,086 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 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 07:37:21,086 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 489 flow. Second operand 42 states and 3031 transitions. [2022-01-19 07:37:21,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 281 transitions, 1913 flow [2022-01-19 07:37:21,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 281 transitions, 1871 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-01-19 07:37:21,096 INFO L242 Difference]: Finished difference. Result has 183 places, 174 transitions, 1237 flow [2022-01-19 07:37:21,097 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1237, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2022-01-19 07:37:21,097 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 91 predicate places. [2022-01-19 07:37:21,097 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 1237 flow [2022-01-19 07:37:21,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 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 07:37:21,098 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:21,098 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:21,125 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 07:37:21,318 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,SelfDestructingSolverStorable5 [2022-01-19 07:37:21,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:21,319 INFO L85 PathProgramCache]: Analyzing trace with hash 627040508, now seen corresponding path program 2 times [2022-01-19 07:37:21,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:21,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287527625] [2022-01-19 07:37:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:21,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-19 07:37:21,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287527625] [2022-01-19 07:37:21,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287527625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:21,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:21,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 07:37:21,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016949831] [2022-01-19 07:37:21,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:21,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 07:37:21,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 07:37:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 07:37:21,374 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-01-19 07:37:21,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 1237 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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 07:37:21,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:21,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-01-19 07:37:21,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:21,583 INFO L129 PetriNetUnfolder]: 392/1476 cut-off events. [2022-01-19 07:37:21,583 INFO L130 PetriNetUnfolder]: For 9574/9655 co-relation queries the response was YES. [2022-01-19 07:37:21,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5660 conditions, 1476 events. 392/1476 cut-off events. For 9574/9655 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10580 event pairs, 89 based on Foata normal form. 34/1370 useless extension candidates. Maximal degree in co-relation 4950. Up to 222 conditions per place. [2022-01-19 07:37:21,602 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 19 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2022-01-19 07:37:21,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 1315 flow [2022-01-19 07:37:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 07:37:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 07:37:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2022-01-19 07:37:21,604 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2022-01-19 07:37:21,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2022-01-19 07:37:21,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2022-01-19 07:37:21,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:21,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2022-01-19 07:37:21,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 07:37:21,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 07:37:21,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 07:37:21,606 INFO L186 Difference]: Start difference. First operand has 183 places, 174 transitions, 1237 flow. Second operand 4 states and 376 transitions. [2022-01-19 07:37:21,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 1315 flow [2022-01-19 07:37:21,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 185 transitions, 1176 flow, removed 40 selfloop flow, removed 11 redundant places. [2022-01-19 07:37:21,641 INFO L242 Difference]: Finished difference. Result has 178 places, 177 transitions, 1132 flow [2022-01-19 07:37:21,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1132, PETRI_PLACES=178, PETRI_TRANSITIONS=177} [2022-01-19 07:37:21,641 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 86 predicate places. [2022-01-19 07:37:21,642 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 177 transitions, 1132 flow [2022-01-19 07:37:21,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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 07:37:21,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:21,642 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:21,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 07:37:21,643 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:21,643 INFO L85 PathProgramCache]: Analyzing trace with hash -913504088, now seen corresponding path program 1 times [2022-01-19 07:37:21,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:21,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248677296] [2022-01-19 07:37:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:21,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-19 07:37:21,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248677296] [2022-01-19 07:37:21,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248677296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:21,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:21,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 07:37:21,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568736845] [2022-01-19 07:37:21,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:21,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 07:37:21,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 07:37:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 07:37:21,710 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-01-19 07:37:21,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 177 transitions, 1132 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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 07:37:21,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:21,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-01-19 07:37:21,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:22,063 INFO L129 PetriNetUnfolder]: 744/2581 cut-off events. [2022-01-19 07:37:22,063 INFO L130 PetriNetUnfolder]: For 15966/16070 co-relation queries the response was YES. [2022-01-19 07:37:22,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10355 conditions, 2581 events. 744/2581 cut-off events. For 15966/16070 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22277 event pairs, 113 based on Foata normal form. 30/2482 useless extension candidates. Maximal degree in co-relation 8938. Up to 360 conditions per place. [2022-01-19 07:37:22,100 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 21 selfloop transitions, 6 changer transitions 0/191 dead transitions. [2022-01-19 07:37:22,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 191 transitions, 1233 flow [2022-01-19 07:37:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 07:37:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 07:37:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-01-19 07:37:22,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2022-01-19 07:37:22,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-01-19 07:37:22,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-01-19 07:37:22,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:22,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-01-19 07:37:22,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 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 07:37:22,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 07:37:22,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 07:37:22,104 INFO L186 Difference]: Start difference. First operand has 178 places, 177 transitions, 1132 flow. Second operand 4 states and 375 transitions. [2022-01-19 07:37:22,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 191 transitions, 1233 flow [2022-01-19 07:37:22,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 191 transitions, 1233 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 07:37:22,178 INFO L242 Difference]: Finished difference. Result has 184 places, 180 transitions, 1170 flow [2022-01-19 07:37:22,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1170, PETRI_PLACES=184, PETRI_TRANSITIONS=180} [2022-01-19 07:37:22,181 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 92 predicate places. [2022-01-19 07:37:22,181 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 180 transitions, 1170 flow [2022-01-19 07:37:22,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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 07:37:22,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:22,182 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:22,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 07:37:22,182 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -990376246, now seen corresponding path program 1 times [2022-01-19 07:37:22,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:22,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318212168] [2022-01-19 07:37:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:22,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-19 07:37:22,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:22,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318212168] [2022-01-19 07:37:22,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318212168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:22,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:22,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 07:37:22,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878244047] [2022-01-19 07:37:22,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:22,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 07:37:22,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 07:37:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 07:37:22,271 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-01-19 07:37:22,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 180 transitions, 1170 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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 07:37:22,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:22,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-01-19 07:37:22,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:22,575 INFO L129 PetriNetUnfolder]: 415/1673 cut-off events. [2022-01-19 07:37:22,576 INFO L130 PetriNetUnfolder]: For 11732/11836 co-relation queries the response was YES. [2022-01-19 07:37:22,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7315 conditions, 1673 events. 415/1673 cut-off events. For 11732/11836 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12896 event pairs, 98 based on Foata normal form. 58/1663 useless extension candidates. Maximal degree in co-relation 6829. Up to 193 conditions per place. [2022-01-19 07:37:22,597 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 15 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2022-01-19 07:37:22,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 186 transitions, 1236 flow [2022-01-19 07:37:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 07:37:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 07:37:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2022-01-19 07:37:22,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8918269230769231 [2022-01-19 07:37:22,599 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2022-01-19 07:37:22,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2022-01-19 07:37:22,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:22,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2022-01-19 07:37:22,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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 07:37:22,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 07:37:22,601 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 07:37:22,601 INFO L186 Difference]: Start difference. First operand has 184 places, 180 transitions, 1170 flow. Second operand 4 states and 371 transitions. [2022-01-19 07:37:22,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 186 transitions, 1236 flow [2022-01-19 07:37:22,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 186 transitions, 1236 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 07:37:22,642 INFO L242 Difference]: Finished difference. Result has 189 places, 182 transitions, 1210 flow [2022-01-19 07:37:22,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1210, PETRI_PLACES=189, PETRI_TRANSITIONS=182} [2022-01-19 07:37:22,643 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2022-01-19 07:37:22,644 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 182 transitions, 1210 flow [2022-01-19 07:37:22,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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 07:37:22,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:22,644 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:22,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 07:37:22,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1464456534, now seen corresponding path program 1 times [2022-01-19 07:37:22,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:22,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101077554] [2022-01-19 07:37:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:22,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:22,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101077554] [2022-01-19 07:37:22,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101077554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566437753] [2022-01-19 07:37:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:22,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:22,780 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 07:37:22,791 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 07:37:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 07:37:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:23,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:23,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566437753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:23,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:23,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-01-19 07:37:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080423601] [2022-01-19 07:37:23,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:23,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 07:37:23,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 07:37:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 07:37:23,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-01-19 07:37:23,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 182 transitions, 1210 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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 07:37:23,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:23,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-01-19 07:37:23,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:24,026 INFO L129 PetriNetUnfolder]: 761/3083 cut-off events. [2022-01-19 07:37:24,027 INFO L130 PetriNetUnfolder]: For 22061/22238 co-relation queries the response was YES. [2022-01-19 07:37:24,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13471 conditions, 3083 events. 761/3083 cut-off events. For 22061/22238 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27583 event pairs, 192 based on Foata normal form. 63/3038 useless extension candidates. Maximal degree in co-relation 12013. Up to 354 conditions per place. [2022-01-19 07:37:24,067 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 29 selfloop transitions, 20 changer transitions 4/213 dead transitions. [2022-01-19 07:37:24,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 213 transitions, 1409 flow [2022-01-19 07:37:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:37:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:37:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2022-01-19 07:37:24,070 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2022-01-19 07:37:24,070 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2022-01-19 07:37:24,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2022-01-19 07:37:24,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:24,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2022-01-19 07:37:24,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 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 07:37:24,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:24,074 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:24,074 INFO L186 Difference]: Start difference. First operand has 189 places, 182 transitions, 1210 flow. Second operand 10 states and 844 transitions. [2022-01-19 07:37:24,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 213 transitions, 1409 flow [2022-01-19 07:37:24,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 213 transitions, 1401 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:24,131 INFO L242 Difference]: Finished difference. Result has 200 places, 193 transitions, 1308 flow [2022-01-19 07:37:24,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=200, PETRI_TRANSITIONS=193} [2022-01-19 07:37:24,132 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 108 predicate places. [2022-01-19 07:37:24,132 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 193 transitions, 1308 flow [2022-01-19 07:37:24,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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 07:37:24,132 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:24,132 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:24,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 07:37:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:24,347 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash 419087372, now seen corresponding path program 2 times [2022-01-19 07:37:24,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:24,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597416672] [2022-01-19 07:37:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:24,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:24,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:24,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597416672] [2022-01-19 07:37:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597416672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:24,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890576450] [2022-01-19 07:37:24,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:37:24,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:24,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:24,529 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 07:37:24,531 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 07:37:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:37:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:24,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 07:37:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:24,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:25,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890576450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:25,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:25,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-01-19 07:37:25,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748453493] [2022-01-19 07:37:25,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:25,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 07:37:25,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 07:37:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-19 07:37:25,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-01-19 07:37:25,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 193 transitions, 1308 flow. Second operand has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 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 07:37:25,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:25,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-01-19 07:37:25,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:26,420 INFO L129 PetriNetUnfolder]: 1735/5296 cut-off events. [2022-01-19 07:37:26,420 INFO L130 PetriNetUnfolder]: For 46143/46172 co-relation queries the response was YES. [2022-01-19 07:37:26,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26284 conditions, 5296 events. 1735/5296 cut-off events. For 46143/46172 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 49050 event pairs, 470 based on Foata normal form. 15/5267 useless extension candidates. Maximal degree in co-relation 26176. Up to 1521 conditions per place. [2022-01-19 07:37:26,510 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 331 selfloop transitions, 28 changer transitions 4/440 dead transitions. [2022-01-19 07:37:26,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 440 transitions, 4362 flow [2022-01-19 07:37:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 07:37:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 07:37:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 845 transitions. [2022-01-19 07:37:26,513 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2022-01-19 07:37:26,513 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 845 transitions. [2022-01-19 07:37:26,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 845 transitions. [2022-01-19 07:37:26,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:26,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 845 transitions. [2022-01-19 07:37:26,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.81818181818181) internal successors, (845), 11 states have internal predecessors, (845), 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 07:37:26,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:26,517 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:26,518 INFO L186 Difference]: Start difference. First operand has 200 places, 193 transitions, 1308 flow. Second operand 11 states and 845 transitions. [2022-01-19 07:37:26,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 440 transitions, 4362 flow [2022-01-19 07:37:26,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 440 transitions, 4276 flow, removed 33 selfloop flow, removed 7 redundant places. [2022-01-19 07:37:26,617 INFO L242 Difference]: Finished difference. Result has 204 places, 201 transitions, 1366 flow [2022-01-19 07:37:26,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1366, PETRI_PLACES=204, PETRI_TRANSITIONS=201} [2022-01-19 07:37:26,618 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2022-01-19 07:37:26,618 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 201 transitions, 1366 flow [2022-01-19 07:37:26,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 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 07:37:26,618 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:26,619 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:26,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 07:37:26,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:26,820 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1103714706, now seen corresponding path program 3 times [2022-01-19 07:37:26,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:26,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944873625] [2022-01-19 07:37:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:26,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:26,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944873625] [2022-01-19 07:37:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944873625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298641315] [2022-01-19 07:37:26,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:37:26,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:26,988 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 07:37:26,989 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 07:37:27,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 07:37:27,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 07:37:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:27,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:27,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298641315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:27,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:27,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-01-19 07:37:27,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673015335] [2022-01-19 07:37:27,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:27,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 07:37:27,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 07:37:27,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 07:37:27,581 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-01-19 07:37:27,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 201 transitions, 1366 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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 07:37:27,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:27,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-01-19 07:37:27,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:28,443 INFO L129 PetriNetUnfolder]: 1059/4424 cut-off events. [2022-01-19 07:37:28,443 INFO L130 PetriNetUnfolder]: For 33809/34109 co-relation queries the response was YES. [2022-01-19 07:37:28,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19931 conditions, 4424 events. 1059/4424 cut-off events. For 33809/34109 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 43400 event pairs, 314 based on Foata normal form. 110/4379 useless extension candidates. Maximal degree in co-relation 19813. Up to 599 conditions per place. [2022-01-19 07:37:28,492 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 23 changer transitions 4/234 dead transitions. [2022-01-19 07:37:28,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 234 transitions, 1669 flow [2022-01-19 07:37:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:37:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:37:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2022-01-19 07:37:28,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2022-01-19 07:37:28,495 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2022-01-19 07:37:28,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2022-01-19 07:37:28,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:28,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2022-01-19 07:37:28,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 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 07:37:28,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:28,499 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:28,499 INFO L186 Difference]: Start difference. First operand has 204 places, 201 transitions, 1366 flow. Second operand 10 states and 843 transitions. [2022-01-19 07:37:28,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 234 transitions, 1669 flow [2022-01-19 07:37:28,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 1599 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-01-19 07:37:28,567 INFO L242 Difference]: Finished difference. Result has 210 places, 214 transitions, 1491 flow [2022-01-19 07:37:28,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1491, PETRI_PLACES=210, PETRI_TRANSITIONS=214} [2022-01-19 07:37:28,568 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2022-01-19 07:37:28,568 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 214 transitions, 1491 flow [2022-01-19 07:37:28,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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 07:37:28,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:28,569 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:28,594 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 07:37:28,792 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,SelfDestructingSolverStorable11 [2022-01-19 07:37:28,792 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1223366174, now seen corresponding path program 4 times [2022-01-19 07:37:28,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:28,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793266568] [2022-01-19 07:37:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:28,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:28,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793266568] [2022-01-19 07:37:28,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793266568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857283394] [2022-01-19 07:37:28,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 07:37:28,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:28,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:28,924 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 07:37:28,951 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 07:37:28,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 07:37:28,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 07:37:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:29,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:29,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857283394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:29,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:29,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-01-19 07:37:29,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528115862] [2022-01-19 07:37:29,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:29,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 07:37:29,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 07:37:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 07:37:29,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-01-19 07:37:29,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 214 transitions, 1491 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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 07:37:29,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:29,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-01-19 07:37:29,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:30,293 INFO L129 PetriNetUnfolder]: 1185/4954 cut-off events. [2022-01-19 07:37:30,293 INFO L130 PetriNetUnfolder]: For 38316/38644 co-relation queries the response was YES. [2022-01-19 07:37:30,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 4954 events. 1185/4954 cut-off events. For 38316/38644 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 50265 event pairs, 338 based on Foata normal form. 126/4910 useless extension candidates. Maximal degree in co-relation 22335. Up to 675 conditions per place. [2022-01-19 07:37:30,348 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 61 selfloop transitions, 23 changer transitions 4/248 dead transitions. [2022-01-19 07:37:30,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 248 transitions, 1830 flow [2022-01-19 07:37:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:37:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:37:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2022-01-19 07:37:30,350 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2022-01-19 07:37:30,350 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2022-01-19 07:37:30,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2022-01-19 07:37:30,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:30,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2022-01-19 07:37:30,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 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 07:37:30,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:30,355 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 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 07:37:30,355 INFO L186 Difference]: Start difference. First operand has 210 places, 214 transitions, 1491 flow. Second operand 10 states and 843 transitions. [2022-01-19 07:37:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 248 transitions, 1830 flow [2022-01-19 07:37:30,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 248 transitions, 1801 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-01-19 07:37:30,447 INFO L242 Difference]: Finished difference. Result has 217 places, 228 transitions, 1661 flow [2022-01-19 07:37:30,448 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1661, PETRI_PLACES=217, PETRI_TRANSITIONS=228} [2022-01-19 07:37:30,448 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 125 predicate places. [2022-01-19 07:37:30,449 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 228 transitions, 1661 flow [2022-01-19 07:37:30,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 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 07:37:30,449 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:30,449 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:30,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 07:37:30,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:30,664 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1902387016, now seen corresponding path program 5 times [2022-01-19 07:37:30,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:30,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624198302] [2022-01-19 07:37:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:30,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:30,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624198302] [2022-01-19 07:37:30,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624198302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:30,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654555838] [2022-01-19 07:37:30,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 07:37:30,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:30,856 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 07:37:30,857 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 07:37:30,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 07:37:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 07:37:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:31,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:31,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654555838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:31,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:31,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-01-19 07:37:31,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063265403] [2022-01-19 07:37:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 07:37:31,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 07:37:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-19 07:37:31,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-01-19 07:37:31,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 228 transitions, 1661 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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 07:37:31,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:31,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-01-19 07:37:31,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:32,617 INFO L129 PetriNetUnfolder]: 1429/6168 cut-off events. [2022-01-19 07:37:32,618 INFO L130 PetriNetUnfolder]: For 50401/50842 co-relation queries the response was YES. [2022-01-19 07:37:32,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28610 conditions, 6168 events. 1429/6168 cut-off events. For 50401/50842 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 65914 event pairs, 394 based on Foata normal form. 233/6227 useless extension candidates. Maximal degree in co-relation 28450. Up to 717 conditions per place. [2022-01-19 07:37:32,682 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 51 selfloop transitions, 51 changer transitions 4/266 dead transitions. [2022-01-19 07:37:32,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 266 transitions, 2070 flow [2022-01-19 07:37:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 07:37:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 07:37:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2022-01-19 07:37:32,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2022-01-19 07:37:32,685 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2022-01-19 07:37:32,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2022-01-19 07:37:32,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:32,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2022-01-19 07:37:32,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 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 07:37:32,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:32,688 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:32,688 INFO L186 Difference]: Start difference. First operand has 217 places, 228 transitions, 1661 flow. Second operand 11 states and 933 transitions. [2022-01-19 07:37:32,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 266 transitions, 2070 flow [2022-01-19 07:37:32,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 266 transitions, 2025 flow, removed 18 selfloop flow, removed 5 redundant places. [2022-01-19 07:37:32,900 INFO L242 Difference]: Finished difference. Result has 223 places, 240 transitions, 1869 flow [2022-01-19 07:37:32,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1869, PETRI_PLACES=223, PETRI_TRANSITIONS=240} [2022-01-19 07:37:32,901 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 131 predicate places. [2022-01-19 07:37:32,901 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 240 transitions, 1869 flow [2022-01-19 07:37:32,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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 07:37:32,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:32,902 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:32,930 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 07:37:33,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:33,128 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1115209364, now seen corresponding path program 6 times [2022-01-19 07:37:33,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:33,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962380230] [2022-01-19 07:37:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:33,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:33,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962380230] [2022-01-19 07:37:33,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962380230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109779548] [2022-01-19 07:37:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 07:37:33,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:33,290 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 07:37:33,291 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 07:37:33,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 07:37:33,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 07:37:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:33,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:33,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109779548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:33,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:33,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-01-19 07:37:33,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765130715] [2022-01-19 07:37:33,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:33,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 07:37:33,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 07:37:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-19 07:37:33,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-01-19 07:37:33,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 240 transitions, 1869 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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 07:37:33,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:33,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-01-19 07:37:33,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:35,171 INFO L129 PetriNetUnfolder]: 1708/7358 cut-off events. [2022-01-19 07:37:35,171 INFO L130 PetriNetUnfolder]: For 62548/63055 co-relation queries the response was YES. [2022-01-19 07:37:35,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34571 conditions, 7358 events. 1708/7358 cut-off events. For 62548/63055 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 81641 event pairs, 517 based on Foata normal form. 166/7302 useless extension candidates. Maximal degree in co-relation 34384. Up to 905 conditions per place. [2022-01-19 07:37:35,311 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 89 selfloop transitions, 33 changer transitions 4/286 dead transitions. [2022-01-19 07:37:35,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 286 transitions, 2417 flow [2022-01-19 07:37:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 07:37:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 07:37:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-01-19 07:37:35,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-01-19 07:37:35,313 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-01-19 07:37:35,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-01-19 07:37:35,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:35,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-01-19 07:37:35,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 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 07:37:35,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:35,317 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:35,317 INFO L186 Difference]: Start difference. First operand has 223 places, 240 transitions, 1869 flow. Second operand 11 states and 931 transitions. [2022-01-19 07:37:35,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 286 transitions, 2417 flow [2022-01-19 07:37:35,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 2322 flow, removed 43 selfloop flow, removed 5 redundant places. [2022-01-19 07:37:35,437 INFO L242 Difference]: Finished difference. Result has 231 places, 260 transitions, 2120 flow [2022-01-19 07:37:35,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2120, PETRI_PLACES=231, PETRI_TRANSITIONS=260} [2022-01-19 07:37:35,437 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 139 predicate places. [2022-01-19 07:37:35,438 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 260 transitions, 2120 flow [2022-01-19 07:37:35,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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 07:37:35,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:35,438 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:35,456 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 07:37:35,647 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,SelfDestructingSolverStorable14 [2022-01-19 07:37:35,647 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1068784864, now seen corresponding path program 7 times [2022-01-19 07:37:35,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:35,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767866043] [2022-01-19 07:37:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:35,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:35,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767866043] [2022-01-19 07:37:35,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767866043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079370283] [2022-01-19 07:37:35,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 07:37:35,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:35,772 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 07:37:35,774 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 07:37:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 07:37:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:36,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:36,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079370283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:36,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:36,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-01-19 07:37:36,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976685756] [2022-01-19 07:37:36,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:36,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 07:37:36,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 07:37:36,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-19 07:37:36,263 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-01-19 07:37:36,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 260 transitions, 2120 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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 07:37:36,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:36,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-01-19 07:37:36,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:37,856 INFO L129 PetriNetUnfolder]: 1971/8435 cut-off events. [2022-01-19 07:37:37,856 INFO L130 PetriNetUnfolder]: For 72811/73612 co-relation queries the response was YES. [2022-01-19 07:37:37,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39859 conditions, 8435 events. 1971/8435 cut-off events. For 72811/73612 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 96510 event pairs, 561 based on Foata normal form. 370/8561 useless extension candidates. Maximal degree in co-relation 39653. Up to 999 conditions per place. [2022-01-19 07:37:37,941 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 77 selfloop transitions, 61 changer transitions 4/302 dead transitions. [2022-01-19 07:37:37,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 302 transitions, 2672 flow [2022-01-19 07:37:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 07:37:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 07:37:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2022-01-19 07:37:37,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2022-01-19 07:37:37,943 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2022-01-19 07:37:37,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2022-01-19 07:37:37,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:37,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2022-01-19 07:37:37,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 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 07:37:37,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:37,947 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 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 07:37:37,947 INFO L186 Difference]: Start difference. First operand has 231 places, 260 transitions, 2120 flow. Second operand 11 states and 933 transitions. [2022-01-19 07:37:37,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 302 transitions, 2672 flow [2022-01-19 07:37:38,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 302 transitions, 2589 flow, removed 37 selfloop flow, removed 5 redundant places. [2022-01-19 07:37:38,086 INFO L242 Difference]: Finished difference. Result has 240 places, 276 transitions, 2462 flow [2022-01-19 07:37:38,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2462, PETRI_PLACES=240, PETRI_TRANSITIONS=276} [2022-01-19 07:37:38,087 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 148 predicate places. [2022-01-19 07:37:38,087 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 276 transitions, 2462 flow [2022-01-19 07:37:38,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 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 07:37:38,088 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:38,088 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:38,105 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 07:37:38,290 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,SelfDestructingSolverStorable15 [2022-01-19 07:37:38,290 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:37:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash -264766159, now seen corresponding path program 8 times [2022-01-19 07:37:38,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:38,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484471086] [2022-01-19 07:37:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:38,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:38,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:38,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484471086] [2022-01-19 07:37:38,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484471086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:38,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127898384] [2022-01-19 07:37:38,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:37:38,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:38,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:38,774 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 07:37:38,775 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 07:37:38,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:37:38,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:38,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-19 07:37:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:40,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:46,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127898384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:46,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:46,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 40 [2022-01-19 07:37:46,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467085085] [2022-01-19 07:37:46,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:46,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-19 07:37:46,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-19 07:37:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2022-01-19 07:37:46,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-01-19 07:37:46,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 276 transitions, 2462 flow. Second operand has 40 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 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 07:37:46,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:46,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-01-19 07:37:46,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:38:34,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:39:30,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:40:07,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:41:20,991 WARN L228 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 71 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 07:41:31,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:43:39,509 INFO L129 PetriNetUnfolder]: 15788/46229 cut-off events. [2022-01-19 07:43:39,509 INFO L130 PetriNetUnfolder]: For 486961/486961 co-relation queries the response was YES. [2022-01-19 07:43:40,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253173 conditions, 46229 events. 15788/46229 cut-off events. For 486961/486961 co-relation queries the response was YES. Maximal size of possible extension queue 1893. Compared 601628 event pairs, 741 based on Foata normal form. 1196/47303 useless extension candidates. Maximal degree in co-relation 252662. Up to 5799 conditions per place. [2022-01-19 07:43:40,354 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 2729 selfloop transitions, 552 changer transitions 0/3342 dead transitions. [2022-01-19 07:43:40,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 3342 transitions, 42878 flow [2022-01-19 07:43:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-19 07:43:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2022-01-19 07:43:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 12240 transitions. [2022-01-19 07:43:40,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6574989256553503 [2022-01-19 07:43:40,379 INFO L72 ComplementDD]: Start complementDD. Operand 179 states and 12240 transitions. [2022-01-19 07:43:40,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 179 states and 12240 transitions. [2022-01-19 07:43:40,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:43:40,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 179 states and 12240 transitions. [2022-01-19 07:43:40,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 180 states, 179 states have (on average 68.37988826815642) internal successors, (12240), 179 states have internal predecessors, (12240), 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 07:43:40,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 180 states, 180 states have (on average 104.0) internal successors, (18720), 180 states have internal predecessors, (18720), 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 07:43:40,438 INFO L81 ComplementDD]: Finished complementDD. Result has 180 states, 180 states have (on average 104.0) internal successors, (18720), 180 states have internal predecessors, (18720), 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 07:43:40,438 INFO L186 Difference]: Start difference. First operand has 240 places, 276 transitions, 2462 flow. Second operand 179 states and 12240 transitions. [2022-01-19 07:43:40,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 3342 transitions, 42878 flow [2022-01-19 07:43:42,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 3342 transitions, 42023 flow, removed 330 selfloop flow, removed 6 redundant places. [2022-01-19 07:43:42,099 INFO L242 Difference]: Finished difference. Result has 454 places, 814 transitions, 10354 flow [2022-01-19 07:43:42,099 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=179, PETRI_FLOW=10354, PETRI_PLACES=454, PETRI_TRANSITIONS=814} [2022-01-19 07:43:42,100 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 362 predicate places. [2022-01-19 07:43:42,100 INFO L470 AbstractCegarLoop]: Abstraction has has 454 places, 814 transitions, 10354 flow [2022-01-19 07:43:42,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 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 07:43:42,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:43:42,101 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:42,104 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 07:43:42,301 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,SelfDestructingSolverStorable16 [2022-01-19 07:43:42,301 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:43:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:43:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2089560849, now seen corresponding path program 9 times [2022-01-19 07:43:42,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:43:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611067667] [2022-01-19 07:43:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:43:42,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:43:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:43:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:43:42,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:43:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611067667] [2022-01-19 07:43:42,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611067667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:43:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113129019] [2022-01-19 07:43:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:43:42,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:43:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:43:42,656 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 07:43:42,660 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 07:43:42,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 07:43:42,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:43:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 07:43:42,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:43:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:43:43,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:43:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:43:45,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113129019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:43:45,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:43:45,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 36 [2022-01-19 07:43:45,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430026033] [2022-01-19 07:43:45,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:43:45,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 07:43:45,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:43:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 07:43:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 07:43:45,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-01-19 07:43:45,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 814 transitions, 10354 flow. Second operand has 36 states, 36 states have (on average 66.08333333333333) internal successors, (2379), 36 states have internal predecessors, (2379), 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 07:43:45,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:43:45,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-01-19 07:43:45,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:44:09,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:44:52,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:45:19,604 WARN L228 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 07:45:43,224 WARN L228 SmtUtils]: Spent 7.69s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 07:46:41,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:46:55,305 INFO L129 PetriNetUnfolder]: 34134/95359 cut-off events. [2022-01-19 07:46:55,305 INFO L130 PetriNetUnfolder]: For 4301445/4301445 co-relation queries the response was YES. [2022-01-19 07:46:57,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 774700 conditions, 95359 events. 34134/95359 cut-off events. For 4301445/4301445 co-relation queries the response was YES. Maximal size of possible extension queue 2846. Compared 1301933 event pairs, 3441 based on Foata normal form. 2026/96983 useless extension candidates. Maximal degree in co-relation 747778. Up to 13277 conditions per place. [2022-01-19 07:46:58,269 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 2922 selfloop transitions, 1195 changer transitions 0/4178 dead transitions. [2022-01-19 07:46:58,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 4178 transitions, 62630 flow [2022-01-19 07:46:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-19 07:46:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2022-01-19 07:46:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 9822 transitions. [2022-01-19 07:46:58,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6604357181280258 [2022-01-19 07:46:58,280 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 9822 transitions. [2022-01-19 07:46:58,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 9822 transitions. [2022-01-19 07:46:58,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:46:58,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 9822 transitions. [2022-01-19 07:46:58,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 68.68531468531468) internal successors, (9822), 143 states have internal predecessors, (9822), 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 07:46:58,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 104.0) internal successors, (14976), 144 states have internal predecessors, (14976), 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 07:46:58,316 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 104.0) internal successors, (14976), 144 states have internal predecessors, (14976), 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 07:46:58,316 INFO L186 Difference]: Start difference. First operand has 454 places, 814 transitions, 10354 flow. Second operand 143 states and 9822 transitions. [2022-01-19 07:46:58,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 4178 transitions, 62630 flow [2022-01-19 07:47:39,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 4178 transitions, 51663 flow, removed 5328 selfloop flow, removed 28 redundant places. [2022-01-19 07:47:39,269 INFO L242 Difference]: Finished difference. Result has 647 places, 1739 transitions, 22423 flow [2022-01-19 07:47:39,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=7275, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=22423, PETRI_PLACES=647, PETRI_TRANSITIONS=1739} [2022-01-19 07:47:39,270 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 555 predicate places. [2022-01-19 07:47:39,271 INFO L470 AbstractCegarLoop]: Abstraction has has 647 places, 1739 transitions, 22423 flow [2022-01-19 07:47:39,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 66.08333333333333) internal successors, (2379), 36 states have internal predecessors, (2379), 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 07:47:39,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:47:39,271 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:39,275 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 07:47:39,472 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,SelfDestructingSolverStorable17 [2022-01-19 07:47:39,472 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:47:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:47:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1278224110, now seen corresponding path program 10 times [2022-01-19 07:47:39,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:47:39,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085823139] [2022-01-19 07:47:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:47:39,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:47:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:47:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:47:39,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:47:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085823139] [2022-01-19 07:47:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085823139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:47:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615844424] [2022-01-19 07:47:39,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 07:47:39,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:47:39,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:47:39,812 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 07:47:39,816 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 07:47:39,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 07:47:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:47:39,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 07:47:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:47:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:47:40,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:47:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:47:44,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615844424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:47:44,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:47:44,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-01-19 07:47:44,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803233068] [2022-01-19 07:47:44,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:47:44,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-19 07:47:44,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:47:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-19 07:47:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-01-19 07:47:44,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-01-19 07:47:44,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 1739 transitions, 22423 flow. Second operand has 34 states, 34 states have (on average 65.79411764705883) internal successors, (2237), 34 states have internal predecessors, (2237), 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 07:47:44,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:47:44,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-01-19 07:47:44,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:48:41,877 INFO L129 PetriNetUnfolder]: 34732/97454 cut-off events. [2022-01-19 07:48:41,878 INFO L130 PetriNetUnfolder]: For 4369217/4369217 co-relation queries the response was YES. [2022-01-19 07:48:46,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 759711 conditions, 97454 events. 34732/97454 cut-off events. For 4369217/4369217 co-relation queries the response was YES. Maximal size of possible extension queue 2865. Compared 1337709 event pairs, 8909 based on Foata normal form. 20/96777 useless extension candidates. Maximal degree in co-relation 757991. Up to 65241 conditions per place. [2022-01-19 07:48:47,204 INFO L132 encePairwiseOnDemand]: 85/104 looper letters, 1851 selfloop transitions, 101 changer transitions 32/2045 dead transitions. [2022-01-19 07:48:47,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 2045 transitions, 30248 flow [2022-01-19 07:48:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-19 07:48:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-01-19 07:48:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1932 transitions. [2022-01-19 07:48:47,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6634615384615384 [2022-01-19 07:48:47,207 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1932 transitions. [2022-01-19 07:48:47,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1932 transitions. [2022-01-19 07:48:47,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:48:47,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1932 transitions. [2022-01-19 07:48:47,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 69.0) internal successors, (1932), 28 states have internal predecessors, (1932), 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 07:48:47,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 104.0) internal successors, (3016), 29 states have internal predecessors, (3016), 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 07:48:47,213 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 104.0) internal successors, (3016), 29 states have internal predecessors, (3016), 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 07:48:47,213 INFO L186 Difference]: Start difference. First operand has 647 places, 1739 transitions, 22423 flow. Second operand 28 states and 1932 transitions. [2022-01-19 07:48:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 2045 transitions, 30248 flow [2022-01-19 07:50:08,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 2045 transitions, 27401 flow, removed 1283 selfloop flow, removed 30 redundant places. [2022-01-19 07:50:08,415 INFO L242 Difference]: Finished difference. Result has 657 places, 1809 transitions, 21134 flow [2022-01-19 07:50:08,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=20041, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=21134, PETRI_PLACES=657, PETRI_TRANSITIONS=1809} [2022-01-19 07:50:08,417 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 565 predicate places. [2022-01-19 07:50:08,417 INFO L470 AbstractCegarLoop]: Abstraction has has 657 places, 1809 transitions, 21134 flow [2022-01-19 07:50:08,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 65.79411764705883) internal successors, (2237), 34 states have internal predecessors, (2237), 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 07:50:08,418 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:50:08,418 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:08,425 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 07:50:08,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:50:08,622 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:50:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:50:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1385057194, now seen corresponding path program 11 times [2022-01-19 07:50:08,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:50:08,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743511653] [2022-01-19 07:50:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:50:08,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:50:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:50:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 07:50:08,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:50:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743511653] [2022-01-19 07:50:08,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743511653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:50:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413861310] [2022-01-19 07:50:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 07:50:08,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:50:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:50:08,925 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:50:08,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 07:50:09,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 07:50:09,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:50:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 07:50:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:50:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-19 07:50:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:50:10,979 INFO L884 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2022-01-19 07:50:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-19 07:50:11,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413861310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:50:11,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:50:11,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 35 [2022-01-19 07:50:11,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998891354] [2022-01-19 07:50:11,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:50:11,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 07:50:11,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:50:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 07:50:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 07:50:11,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-01-19 07:50:11,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 1809 transitions, 21134 flow. Second operand has 35 states, 35 states have (on average 66.02857142857142) internal successors, (2311), 35 states have internal predecessors, (2311), 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 07:50:11,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:50:11,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-01-19 07:50:11,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:50:43,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2022-01-19 07:51:01,029 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 07:51:01,029 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 07:51:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 07:51:01,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 07:51:01,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 07:51:01,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-01-19 07:51:01,735 WARN L594 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 115 known predicates. [2022-01-19 07:51:01,737 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 07:51:01,737 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 07:51:01,739 INFO L732 BasicCegarLoop]: Path program histogram: [11, 2, 2, 2, 1, 1, 1] [2022-01-19 07:51:01,741 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 07:51:01,741 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 07:51:01,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 07:51:01 BasicIcfg [2022-01-19 07:51:01,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 07:51:01,744 INFO L158 Benchmark]: Toolchain (without parser) took 828494.45ms. Allocated memory was 373.3MB in the beginning and 14.2GB in the end (delta: 13.8GB). Free memory was 319.1MB in the beginning and 7.3GB in the end (delta: -6.9GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2022-01-19 07:51:01,744 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 334.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 07:51:01,745 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.21ms. Allocated memory is still 373.3MB. Free memory was 318.7MB in the beginning and 344.0MB in the end (delta: -25.3MB). Peak memory consumption was 15.8MB. Max. memory is 16.0GB. [2022-01-19 07:51:01,745 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.74ms. Allocated memory is still 373.3MB. Free memory was 344.0MB in the beginning and 343.3MB in the end (delta: 737.7kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 07:51:01,745 INFO L158 Benchmark]: Boogie Preprocessor took 31.20ms. Allocated memory is still 373.3MB. Free memory was 343.3MB in the beginning and 341.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 07:51:01,745 INFO L158 Benchmark]: RCFGBuilder took 404.99ms. Allocated memory is still 373.3MB. Free memory was 341.2MB in the beginning and 327.5MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 07:51:01,746 INFO L158 Benchmark]: TraceAbstraction took 827733.53ms. Allocated memory was 373.3MB in the beginning and 14.2GB in the end (delta: 13.8GB). Free memory was 326.5MB in the beginning and 7.3GB in the end (delta: -6.9GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2022-01-19 07:51:01,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 334.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 275.21ms. Allocated memory is still 373.3MB. Free memory was 318.7MB in the beginning and 344.0MB in the end (delta: -25.3MB). Peak memory consumption was 15.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.74ms. Allocated memory is still 373.3MB. Free memory was 344.0MB in the beginning and 343.3MB in the end (delta: 737.7kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 31.20ms. Allocated memory is still 373.3MB. Free memory was 343.3MB in the beginning and 341.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 404.99ms. Allocated memory is still 373.3MB. Free memory was 341.2MB in the beginning and 327.5MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 827733.53ms. Allocated memory was 373.3MB in the beginning and 14.2GB in the end (delta: 13.8GB). Free memory was 326.5MB in the beginning and 7.3GB in the end (delta: -6.9GB). Peak memory consumption was 6.9GB. 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 - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 115 known predicates. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 115 known predicates. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 115 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 121 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: 827.6s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 796.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 5573 SdHoareTripleChecker+Valid, 67.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5573 mSDsluCounter, 5200 SdHoareTripleChecker+Invalid, 64.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 466 IncrementalHoareTripleChecker+Unchecked, 7895 mSDsCounter, 1002 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12923 IncrementalHoareTripleChecker+Invalid, 14395 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1002 mSolverCounterUnsat, 504 mSDtfsCounter, 12923 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3159 GetRequests, 2399 SyntacticMatches, 26 SemanticMatches, 733 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29920 ImplicationChecksByTransitivity, 501.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22423occurred in iteration=18, InterpolantAutomatonStates: 518, 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: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 3096 NumberOfCodeBlocks, 3096 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 4304 ConstructedInterpolants, 44 QuantifiedInterpolants, 34561 SizeOfPredicates, 150 NumberOfNonLiveVariables, 2602 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 46 InterpolantComputations, 7 PerfectInterpolantSequences, 162/760 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown