/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 23:31:20,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 23:31:20,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 23:31:20,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 23:31:20,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 23:31:20,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 23:31:20,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 23:31:20,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 23:31:20,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 23:31:20,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 23:31:20,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 23:31:20,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 23:31:20,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 23:31:20,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 23:31:20,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 23:31:20,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 23:31:20,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 23:31:20,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 23:31:20,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 23:31:20,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 23:31:20,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 23:31:20,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 23:31:20,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 23:31:20,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 23:31:20,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-20 23:31:20,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 23:31:20,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 23:31:20,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 23:31:20,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 23:31:20,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 23:31:20,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 23:31:20,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 23:31:20,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 23:31:20,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 23:31:20,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 23:31:20,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 23:31:20,656 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.epf [2022-09-20 23:31:20,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 23:31:20,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 23:31:20,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 23:31:20,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 23:31:20,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 23:31:20,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 23:31:20,689 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 23:31:20,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 23:31:20,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 23:31:20,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 23:31:20,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 23:31:20,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 23:31:20,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 23:31:20,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 23:31:20,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 23:31:20,691 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 23:31:20,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 23:31:20,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 23:31:20,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 23:31:20,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 23:31:20,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 23:31:20,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 23:31:20,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 23:31:20,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:31:20,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 23:31:20,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 23:31:20,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 23:31:20,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 23:31:20,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 23:31:20,694 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 23:31:20,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 23:31:20,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 23:31:20,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 23:31:20,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 23:31:20,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 23:31:20,928 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 23:31:20,931 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 23:31:20,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2022-09-20 23:31:20,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed58ae21/5847c503cbbd4103b7d80797350c14b9/FLAG14c45e2ae [2022-09-20 23:31:21,395 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 23:31:21,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2022-09-20 23:31:21,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed58ae21/5847c503cbbd4103b7d80797350c14b9/FLAG14c45e2ae [2022-09-20 23:31:21,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed58ae21/5847c503cbbd4103b7d80797350c14b9 [2022-09-20 23:31:21,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 23:31:21,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 23:31:21,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 23:31:21,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 23:31:21,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 23:31:21,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2938fa1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21, skipping insertion in model container [2022-09-20 23:31:21,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 23:31:21,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 23:31:21,614 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/popl20-send-receive-alt.wvr.c[2650,2663] [2022-09-20 23:31:21,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:31:21,633 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 23:31:21,655 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/popl20-send-receive-alt.wvr.c[2650,2663] [2022-09-20 23:31:21,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:31:21,670 INFO L208 MainTranslator]: Completed translation [2022-09-20 23:31:21,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21 WrapperNode [2022-09-20 23:31:21,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 23:31:21,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 23:31:21,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 23:31:21,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 23:31:21,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,722 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-09-20 23:31:21,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 23:31:21,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 23:31:21,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 23:31:21,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 23:31:21,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 23:31:21,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 23:31:21,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 23:31:21,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 23:31:21,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (1/1) ... [2022-09-20 23:31:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:31:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:31:21,791 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) [2022-09-20 23:31:21,792 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 [2022-09-20 23:31:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 23:31:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 23:31:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 23:31:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 23:31:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 23:31:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 23:31:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 23:31:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 23:31:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 23:31:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 23:31:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 23:31:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 23:31:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 23:31:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 23:31:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 23:31:21,822 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 23:31:21,888 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 23:31:21,889 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 23:31:22,148 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 23:31:22,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 23:31:22,210 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-20 23:31:22,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:31:22 BoogieIcfgContainer [2022-09-20 23:31:22,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 23:31:22,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 23:31:22,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 23:31:22,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 23:31:22,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:31:21" (1/3) ... [2022-09-20 23:31:22,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359447c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:31:22, skipping insertion in model container [2022-09-20 23:31:22,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:31:21" (2/3) ... [2022-09-20 23:31:22,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359447c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:31:22, skipping insertion in model container [2022-09-20 23:31:22,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:31:22" (3/3) ... [2022-09-20 23:31:22,220 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-09-20 23:31:22,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 23:31:22,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 23:31:22,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 23:31:22,315 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 23:31:22,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-09-20 23:31:22,417 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-09-20 23:31:22,418 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 23:31:22,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-09-20 23:31:22,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-09-20 23:31:22,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-09-20 23:31:22,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:31:22,443 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5314ed7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:31:22,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 23:31:22,491 INFO L130 PetriNetUnfolder]: 11/121 cut-off events. [2022-09-20 23:31:22,491 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 23:31:22,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:22,492 INFO L208 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, 1, 1, 1] [2022-09-20 23:31:22,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash -399565786, now seen corresponding path program 1 times [2022-09-20 23:31:22,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:22,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046341760] [2022-09-20 23:31:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:22,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:22,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046341760] [2022-09-20 23:31:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046341760] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:31:22,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:31:22,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:31:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078164687] [2022-09-20 23:31:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:31:22,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:31:22,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:31:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:31:22,815 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2022-09-20 23:31:22,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:22,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:22,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2022-09-20 23:31:22,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:22,867 INFO L130 PetriNetUnfolder]: 8/122 cut-off events. [2022-09-20 23:31:22,867 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-09-20 23:31:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2022-09-20 23:31:22,869 INFO L137 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2022-09-20 23:31:22,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2022-09-20 23:31:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:31:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:31:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2022-09-20 23:31:22,885 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2022-09-20 23:31:22,886 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2022-09-20 23:31:22,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2022-09-20 23:31:22,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:22,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2022-09-20 23:31:22,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:22,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:22,897 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:22,899 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2022-09-20 23:31:22,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2022-09-20 23:31:22,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 23:31:22,907 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2022-09-20 23:31:22,909 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2022-09-20 23:31:22,913 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2022-09-20 23:31:22,913 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2022-09-20 23:31:22,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:22,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:22,925 INFO L208 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, 1, 1, 1, 1, 1] [2022-09-20 23:31:22,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 23:31:22,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash -630135141, now seen corresponding path program 1 times [2022-09-20 23:31:22,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:22,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841050258] [2022-09-20 23:31:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:22,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:23,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:23,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841050258] [2022-09-20 23:31:23,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841050258] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:31:23,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:31:23,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 23:31:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315244906] [2022-09-20 23:31:23,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:31:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 23:31:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 23:31:23,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 23:31:23,175 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2022-09-20 23:31:23,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:23,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2022-09-20 23:31:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:23,303 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2022-09-20 23:31:23,308 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-09-20 23:31:23,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 258 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2022-09-20 23:31:23,310 INFO L137 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2022-09-20 23:31:23,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2022-09-20 23:31:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 23:31:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 23:31:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2022-09-20 23:31:23,314 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2022-09-20 23:31:23,314 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2022-09-20 23:31:23,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2022-09-20 23:31:23,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:23,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2022-09-20 23:31:23,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,320 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2022-09-20 23:31:23,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2022-09-20 23:31:23,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:31:23,324 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2022-09-20 23:31:23,324 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-09-20 23:31:23,325 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-09-20 23:31:23,325 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2022-09-20 23:31:23,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:23,326 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 23:31:23,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 677619638, now seen corresponding path program 1 times [2022-09-20 23:31:23,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27384516] [2022-09-20 23:31:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:23,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:23,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27384516] [2022-09-20 23:31:23,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27384516] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:31:23,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:31:23,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:31:23,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237804783] [2022-09-20 23:31:23,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:31:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:31:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:23,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:31:23,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:31:23,466 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2022-09-20 23:31:23,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:23,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2022-09-20 23:31:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:23,539 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2022-09-20 23:31:23,540 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-09-20 23:31:23,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 352 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2022-09-20 23:31:23,543 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2022-09-20 23:31:23,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2022-09-20 23:31:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:31:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:31:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-09-20 23:31:23,545 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2022-09-20 23:31:23,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-09-20 23:31:23,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-09-20 23:31:23,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:23,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-09-20 23:31:23,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 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) [2022-09-20 23:31:23,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 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) [2022-09-20 23:31:23,551 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2022-09-20 23:31:23,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2022-09-20 23:31:23,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-09-20 23:31:23,557 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2022-09-20 23:31:23,557 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2022-09-20 23:31:23,559 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2022-09-20 23:31:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2022-09-20 23:31:23,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:23,560 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 23:31:23,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash 486381972, now seen corresponding path program 1 times [2022-09-20 23:31:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:23,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684609379] [2022-09-20 23:31:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:31:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:23,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684609379] [2022-09-20 23:31:23,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684609379] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:31:23,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:31:23,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:31:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687951276] [2022-09-20 23:31:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:31:23,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:31:23,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:23,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:31:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:31:23,719 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-09-20 23:31:23,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:23,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-09-20 23:31:23,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:23,773 INFO L130 PetriNetUnfolder]: 29/229 cut-off events. [2022-09-20 23:31:23,773 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-09-20 23:31:23,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 229 events. 29/229 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 673 event pairs, 7 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 322. Up to 46 conditions per place. [2022-09-20 23:31:23,777 INFO L137 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2022-09-20 23:31:23,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 316 flow [2022-09-20 23:31:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:31:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:31:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-09-20 23:31:23,780 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-09-20 23:31:23,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-09-20 23:31:23,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-09-20 23:31:23,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:23,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-09-20 23:31:23,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 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) [2022-09-20 23:31:23,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 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) [2022-09-20 23:31:23,782 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 3 states and 360 transitions. [2022-09-20 23:31:23,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 316 flow [2022-09-20 23:31:23,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:31:23,788 INFO L231 Difference]: Finished difference. Result has 119 places, 115 transitions, 266 flow [2022-09-20 23:31:23,788 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2022-09-20 23:31:23,790 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-09-20 23:31:23,790 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 266 flow [2022-09-20 23:31:23,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:23,793 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:23,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 23:31:23,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1417694404, now seen corresponding path program 1 times [2022-09-20 23:31:23,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:23,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984770605] [2022-09-20 23:31:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984770605] [2022-09-20 23:31:23,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984770605] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:31:23,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:31:23,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 23:31:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542855285] [2022-09-20 23:31:23,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:31:23,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 23:31:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 23:31:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 23:31:23,960 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 133 [2022-09-20 23:31:23,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:23,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:23,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 133 [2022-09-20 23:31:23,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:24,104 INFO L130 PetriNetUnfolder]: 24/281 cut-off events. [2022-09-20 23:31:24,105 INFO L131 PetriNetUnfolder]: For 50/54 co-relation queries the response was YES. [2022-09-20 23:31:24,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 281 events. 24/281 cut-off events. For 50/54 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 885 event pairs, 12 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 398. Up to 45 conditions per place. [2022-09-20 23:31:24,106 INFO L137 encePairwiseOnDemand]: 125/133 looper letters, 22 selfloop transitions, 6 changer transitions 9/128 dead transitions. [2022-09-20 23:31:24,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 128 transitions, 376 flow [2022-09-20 23:31:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 23:31:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 23:31:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 756 transitions. [2022-09-20 23:31:24,109 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2022-09-20 23:31:24,109 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 756 transitions. [2022-09-20 23:31:24,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 756 transitions. [2022-09-20 23:31:24,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:24,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 756 transitions. [2022-09-20 23:31:24,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:24,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:24,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:24,115 INFO L175 Difference]: Start difference. First operand has 119 places, 115 transitions, 266 flow. Second operand 7 states and 756 transitions. [2022-09-20 23:31:24,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 128 transitions, 376 flow [2022-09-20 23:31:24,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:31:24,118 INFO L231 Difference]: Finished difference. Result has 126 places, 116 transitions, 286 flow [2022-09-20 23:31:24,118 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=126, PETRI_TRANSITIONS=116} [2022-09-20 23:31:24,121 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2022-09-20 23:31:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 116 transitions, 286 flow [2022-09-20 23:31:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:24,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:24,121 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 23:31:24,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1671458293, now seen corresponding path program 1 times [2022-09-20 23:31:24,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:24,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348831541] [2022-09-20 23:31:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:31:24,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348831541] [2022-09-20 23:31:24,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348831541] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:31:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738946233] [2022-09-20 23:31:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:31:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:31:24,354 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) [2022-09-20 23:31:24,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 23:31:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:24,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2022-09-20 23:31:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:31:24,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:31:25,017 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 23:31:25,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-09-20 23:31:25,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:31:25,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:31:25,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:31:25,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-09-20 23:31:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:25,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:31:27,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-09-20 23:31:27,045 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 309 [2022-09-20 23:31:27,057 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 261 [2022-09-20 23:31:27,072 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 237 [2022-09-20 23:31:27,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-09-20 23:31:27,263 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 153 [2022-09-20 23:31:27,275 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 129 [2022-09-20 23:31:27,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:27,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 117 [2022-09-20 23:31:28,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-09-20 23:31:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:28,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738946233] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:31:28,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:31:28,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 25] total 51 [2022-09-20 23:31:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869609939] [2022-09-20 23:31:28,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:31:28,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-09-20 23:31:28,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:28,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-09-20 23:31:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=1873, Unknown=63, NotChecked=0, Total=2550 [2022-09-20 23:31:28,607 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2022-09-20 23:31:28,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 116 transitions, 286 flow. Second operand has 51 states, 51 states have (on average 61.78431372549019) internal successors, (3151), 51 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:28,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:28,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2022-09-20 23:31:28,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:30,474 INFO L130 PetriNetUnfolder]: 167/936 cut-off events. [2022-09-20 23:31:30,474 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-09-20 23:31:30,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 936 events. 167/936 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5956 event pairs, 14 based on Foata normal form. 4/866 useless extension candidates. Maximal degree in co-relation 1516. Up to 86 conditions per place. [2022-09-20 23:31:30,480 INFO L137 encePairwiseOnDemand]: 102/133 looper letters, 89 selfloop transitions, 38 changer transitions 34/215 dead transitions. [2022-09-20 23:31:30,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 215 transitions, 886 flow [2022-09-20 23:31:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-09-20 23:31:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-09-20 23:31:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2643 transitions. [2022-09-20 23:31:30,488 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4731471535982814 [2022-09-20 23:31:30,488 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2643 transitions. [2022-09-20 23:31:30,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2643 transitions. [2022-09-20 23:31:30,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:30,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2643 transitions. [2022-09-20 23:31:30,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 62.92857142857143) internal successors, (2643), 42 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:30,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 133.0) internal successors, (5719), 43 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:30,516 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 133.0) internal successors, (5719), 43 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:30,516 INFO L175 Difference]: Start difference. First operand has 126 places, 116 transitions, 286 flow. Second operand 42 states and 2643 transitions. [2022-09-20 23:31:30,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 215 transitions, 886 flow [2022-09-20 23:31:30,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 215 transitions, 872 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-09-20 23:31:30,523 INFO L231 Difference]: Finished difference. Result has 182 places, 136 transitions, 503 flow [2022-09-20 23:31:30,524 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=503, PETRI_PLACES=182, PETRI_TRANSITIONS=136} [2022-09-20 23:31:30,526 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 64 predicate places. [2022-09-20 23:31:30,526 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 136 transitions, 503 flow [2022-09-20 23:31:30,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 61.78431372549019) internal successors, (3151), 51 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:30,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:30,528 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:30,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 23:31:30,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-09-20 23:31:30,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1390228495, now seen corresponding path program 2 times [2022-09-20 23:31:30,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:30,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774907363] [2022-09-20 23:31:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:31:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774907363] [2022-09-20 23:31:30,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774907363] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:31:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665215746] [2022-09-20 23:31:30,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:31:30,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:31:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:31:30,832 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) [2022-09-20 23:31:30,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 23:31:30,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:31:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:31:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 23:31:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:31:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:31:31,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:31:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:31:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665215746] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:31:31,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:31:31,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 9 [2022-09-20 23:31:31,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860080570] [2022-09-20 23:31:31,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:31:31,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 23:31:31,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 23:31:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-09-20 23:31:31,229 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2022-09-20 23:31:31,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 136 transitions, 503 flow. Second operand has 9 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 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) [2022-09-20 23:31:31,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:31,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2022-09-20 23:31:31,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:31,472 INFO L130 PetriNetUnfolder]: 153/1198 cut-off events. [2022-09-20 23:31:31,472 INFO L131 PetriNetUnfolder]: For 1072/1080 co-relation queries the response was YES. [2022-09-20 23:31:31,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2175 conditions, 1198 events. 153/1198 cut-off events. For 1072/1080 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 8177 event pairs, 20 based on Foata normal form. 10/1108 useless extension candidates. Maximal degree in co-relation 2146. Up to 122 conditions per place. [2022-09-20 23:31:31,481 INFO L137 encePairwiseOnDemand]: 127/133 looper letters, 29 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2022-09-20 23:31:31,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 170 transitions, 839 flow [2022-09-20 23:31:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 23:31:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 23:31:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2022-09-20 23:31:31,484 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8872180451127819 [2022-09-20 23:31:31,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2022-09-20 23:31:31,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2022-09-20 23:31:31,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:31,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2022-09-20 23:31:31,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:31,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 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) [2022-09-20 23:31:31,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 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) [2022-09-20 23:31:31,489 INFO L175 Difference]: Start difference. First operand has 182 places, 136 transitions, 503 flow. Second operand 6 states and 708 transitions. [2022-09-20 23:31:31,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 170 transitions, 839 flow [2022-09-20 23:31:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 735 flow, removed 31 selfloop flow, removed 25 redundant places. [2022-09-20 23:31:31,496 INFO L231 Difference]: Finished difference. Result has 156 places, 161 transitions, 724 flow [2022-09-20 23:31:31,496 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=156, PETRI_TRANSITIONS=161} [2022-09-20 23:31:31,497 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 38 predicate places. [2022-09-20 23:31:31,497 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 161 transitions, 724 flow [2022-09-20 23:31:31,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 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) [2022-09-20 23:31:31,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:31,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:31,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 23:31:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-09-20 23:31:31,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash -750355809, now seen corresponding path program 3 times [2022-09-20 23:31:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:31,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992559978] [2022-09-20 23:31:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:31:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992559978] [2022-09-20 23:31:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992559978] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:31:31,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:31:31,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 23:31:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995094346] [2022-09-20 23:31:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:31:31,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 23:31:31,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 23:31:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 23:31:31,838 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2022-09-20 23:31:31,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 161 transitions, 724 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:31,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:31,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2022-09-20 23:31:31,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:32,134 INFO L130 PetriNetUnfolder]: 213/1816 cut-off events. [2022-09-20 23:31:32,135 INFO L131 PetriNetUnfolder]: For 1476/1476 co-relation queries the response was YES. [2022-09-20 23:31:32,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 1816 events. 213/1816 cut-off events. For 1476/1476 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 15104 event pairs, 43 based on Foata normal form. 69/1719 useless extension candidates. Maximal degree in co-relation 3178. Up to 244 conditions per place. [2022-09-20 23:31:32,148 INFO L137 encePairwiseOnDemand]: 129/133 looper letters, 67 selfloop transitions, 4 changer transitions 1/183 dead transitions. [2022-09-20 23:31:32,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 1049 flow [2022-09-20 23:31:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 23:31:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 23:31:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2022-09-20 23:31:32,150 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2022-09-20 23:31:32,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2022-09-20 23:31:32,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2022-09-20 23:31:32,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:32,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2022-09-20 23:31:32,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:32,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:32,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:32,153 INFO L175 Difference]: Start difference. First operand has 156 places, 161 transitions, 724 flow. Second operand 4 states and 474 transitions. [2022-09-20 23:31:32,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 1049 flow [2022-09-20 23:31:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 1003 flow, removed 22 selfloop flow, removed 1 redundant places. [2022-09-20 23:31:32,161 INFO L231 Difference]: Finished difference. Result has 160 places, 159 transitions, 685 flow [2022-09-20 23:31:32,162 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=685, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2022-09-20 23:31:32,164 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 42 predicate places. [2022-09-20 23:31:32,164 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 685 flow [2022-09-20 23:31:32,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:32,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:32,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:32,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-09-20 23:31:32,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:32,165 INFO L85 PathProgramCache]: Analyzing trace with hash -755533783, now seen corresponding path program 1 times [2022-09-20 23:31:32,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:32,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090989380] [2022-09-20 23:31:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:32,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090989380] [2022-09-20 23:31:34,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090989380] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:31:34,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562391848] [2022-09-20 23:31:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:34,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:31:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:31:34,316 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) [2022-09-20 23:31:34,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 23:31:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2022-09-20 23:31:34,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:31:36,092 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 23:31:36,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 22 [2022-09-20 23:31:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:36,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:31:36,703 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:31:36,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2022-09-20 23:31:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:38,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562391848] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:31:38,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:31:38,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 23] total 71 [2022-09-20 23:31:38,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699253382] [2022-09-20 23:31:38,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:31:38,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-09-20 23:31:38,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-09-20 23:31:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4481, Unknown=0, NotChecked=0, Total=4970 [2022-09-20 23:31:38,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-09-20 23:31:38,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 685 flow. Second operand has 71 states, 71 states have (on average 60.54929577464789) internal successors, (4299), 71 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:38,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:38,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-09-20 23:31:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:52,177 INFO L130 PetriNetUnfolder]: 2697/9743 cut-off events. [2022-09-20 23:31:52,177 INFO L131 PetriNetUnfolder]: For 10642/10661 co-relation queries the response was YES. [2022-09-20 23:31:52,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21401 conditions, 9743 events. 2697/9743 cut-off events. For 10642/10661 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 103884 event pairs, 476 based on Foata normal form. 28/8884 useless extension candidates. Maximal degree in co-relation 21374. Up to 2082 conditions per place. [2022-09-20 23:31:52,224 INFO L137 encePairwiseOnDemand]: 92/133 looper letters, 165 selfloop transitions, 176 changer transitions 226/621 dead transitions. [2022-09-20 23:31:52,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 621 transitions, 3863 flow [2022-09-20 23:31:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-09-20 23:31:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-09-20 23:31:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5949 transitions. [2022-09-20 23:31:52,237 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4708349821923229 [2022-09-20 23:31:52,237 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5949 transitions. [2022-09-20 23:31:52,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5949 transitions. [2022-09-20 23:31:52,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:52,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5949 transitions. [2022-09-20 23:31:52,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 62.62105263157895) internal successors, (5949), 95 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:52,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 133.0) internal successors, (12768), 96 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:52,276 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 133.0) internal successors, (12768), 96 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:52,276 INFO L175 Difference]: Start difference. First operand has 160 places, 159 transitions, 685 flow. Second operand 95 states and 5949 transitions. [2022-09-20 23:31:52,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 621 transitions, 3863 flow [2022-09-20 23:31:52,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 621 transitions, 3846 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-09-20 23:31:52,308 INFO L231 Difference]: Finished difference. Result has 307 places, 313 transitions, 2382 flow [2022-09-20 23:31:52,309 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=2382, PETRI_PLACES=307, PETRI_TRANSITIONS=313} [2022-09-20 23:31:52,310 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 189 predicate places. [2022-09-20 23:31:52,310 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 313 transitions, 2382 flow [2022-09-20 23:31:52,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 60.54929577464789) internal successors, (4299), 71 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:52,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:31:52,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:31:52,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 23:31:52,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:31:52,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:31:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:31:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash -768504277, now seen corresponding path program 2 times [2022-09-20 23:31:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:31:52,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038473393] [2022-09-20 23:31:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:31:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:31:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:31:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:31:52,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:31:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038473393] [2022-09-20 23:31:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038473393] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:31:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238222693] [2022-09-20 23:31:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:31:52,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:31:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:31:52,776 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) [2022-09-20 23:31:52,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 23:31:52,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:31:52,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:31:52,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 76 conjunts are in the unsatisfiable core [2022-09-20 23:31:52,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:31:53,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:31:53,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:31:53,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:31:54,105 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 23:31:54,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 23:31:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:54,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:31:55,783 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:55,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-09-20 23:31:55,809 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-09-20 23:31:55,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 275 [2022-09-20 23:31:55,844 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-09-20 23:31:55,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 223 [2022-09-20 23:31:55,878 INFO L356 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2022-09-20 23:31:55,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 197 [2022-09-20 23:31:56,636 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:31:56,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-09-20 23:31:56,654 INFO L356 Elim1Store]: treesize reduction 94, result has 8.7 percent of original size [2022-09-20 23:31:56,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 245 [2022-09-20 23:31:56,675 INFO L356 Elim1Store]: treesize reduction 94, result has 8.7 percent of original size [2022-09-20 23:31:56,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 193 [2022-09-20 23:31:56,696 INFO L356 Elim1Store]: treesize reduction 94, result has 8.7 percent of original size [2022-09-20 23:31:56,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 167 [2022-09-20 23:31:56,766 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-09-20 23:31:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:31:57,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238222693] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:31:57,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:31:57,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 30, 26] total 57 [2022-09-20 23:31:57,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680111837] [2022-09-20 23:31:57,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:31:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-09-20 23:31:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:31:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-09-20 23:31:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2418, Unknown=71, NotChecked=0, Total=3192 [2022-09-20 23:31:57,731 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 133 [2022-09-20 23:31:57,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 313 transitions, 2382 flow. Second operand has 57 states, 57 states have (on average 64.78947368421052) internal successors, (3693), 57 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:57,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:31:57,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 133 [2022-09-20 23:31:57,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:04,435 INFO L130 PetriNetUnfolder]: 2990/14185 cut-off events. [2022-09-20 23:32:04,435 INFO L131 PetriNetUnfolder]: For 265030/265969 co-relation queries the response was YES. [2022-09-20 23:32:04,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76530 conditions, 14185 events. 2990/14185 cut-off events. For 265030/265969 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 173325 event pairs, 703 based on Foata normal form. 295/13635 useless extension candidates. Maximal degree in co-relation 76449. Up to 3171 conditions per place. [2022-09-20 23:32:04,614 INFO L137 encePairwiseOnDemand]: 100/133 looper letters, 235 selfloop transitions, 287 changer transitions 88/681 dead transitions. [2022-09-20 23:32:04,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 681 transitions, 8316 flow [2022-09-20 23:32:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-09-20 23:32:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-09-20 23:32:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4863 transitions. [2022-09-20 23:32:04,622 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5008754763621382 [2022-09-20 23:32:04,622 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4863 transitions. [2022-09-20 23:32:04,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4863 transitions. [2022-09-20 23:32:04,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:04,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4863 transitions. [2022-09-20 23:32:04,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 66.61643835616438) internal successors, (4863), 73 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:04,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 133.0) internal successors, (9842), 74 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:04,643 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 133.0) internal successors, (9842), 74 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:04,643 INFO L175 Difference]: Start difference. First operand has 307 places, 313 transitions, 2382 flow. Second operand 73 states and 4863 transitions. [2022-09-20 23:32:04,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 681 transitions, 8316 flow [2022-09-20 23:32:05,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 681 transitions, 7579 flow, removed 338 selfloop flow, removed 41 redundant places. [2022-09-20 23:32:05,470 INFO L231 Difference]: Finished difference. Result has 344 places, 481 transitions, 5038 flow [2022-09-20 23:32:05,470 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=5038, PETRI_PLACES=344, PETRI_TRANSITIONS=481} [2022-09-20 23:32:05,471 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 226 predicate places. [2022-09-20 23:32:05,471 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 481 transitions, 5038 flow [2022-09-20 23:32:05,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 64.78947368421052) internal successors, (3693), 57 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:05,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:05,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:32:05,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-09-20 23:32:05,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:05,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:32:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1188260393, now seen corresponding path program 3 times [2022-09-20 23:32:05,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:05,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278982430] [2022-09-20 23:32:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:05,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278982430] [2022-09-20 23:32:06,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278982430] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054840019] [2022-09-20 23:32:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:32:06,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:06,404 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) [2022-09-20 23:32:06,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 23:32:06,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 23:32:06,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:32:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2022-09-20 23:32:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:06,860 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 23:32:06,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 23:32:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:32:06,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:07,185 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 23:32:07,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-09-20 23:32:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:32:07,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054840019] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:07,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:07,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 9] total 37 [2022-09-20 23:32:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662537424] [2022-09-20 23:32:07,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-09-20 23:32:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-09-20 23:32:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-09-20 23:32:07,585 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2022-09-20 23:32:07,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 481 transitions, 5038 flow. Second operand has 37 states, 37 states have (on average 69.48648648648648) internal successors, (2571), 37 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:07,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:07,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2022-09-20 23:32:07,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:14,972 INFO L130 PetriNetUnfolder]: 5364/20734 cut-off events. [2022-09-20 23:32:14,972 INFO L131 PetriNetUnfolder]: For 274255/274635 co-relation queries the response was YES. [2022-09-20 23:32:15,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103103 conditions, 20734 events. 5364/20734 cut-off events. For 274255/274635 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 257434 event pairs, 1643 based on Foata normal form. 219/19758 useless extension candidates. Maximal degree in co-relation 103009. Up to 5048 conditions per place. [2022-09-20 23:32:15,454 INFO L137 encePairwiseOnDemand]: 108/133 looper letters, 382 selfloop transitions, 202 changer transitions 63/704 dead transitions. [2022-09-20 23:32:15,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 704 transitions, 9359 flow [2022-09-20 23:32:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-09-20 23:32:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-09-20 23:32:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3049 transitions. [2022-09-20 23:32:15,467 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5331351634901207 [2022-09-20 23:32:15,467 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3049 transitions. [2022-09-20 23:32:15,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3049 transitions. [2022-09-20 23:32:15,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:15,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3049 transitions. [2022-09-20 23:32:15,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 70.90697674418605) internal successors, (3049), 43 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:15,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:15,493 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:15,493 INFO L175 Difference]: Start difference. First operand has 344 places, 481 transitions, 5038 flow. Second operand 43 states and 3049 transitions. [2022-09-20 23:32:15,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 704 transitions, 9359 flow [2022-09-20 23:32:16,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 704 transitions, 8805 flow, removed 245 selfloop flow, removed 47 redundant places. [2022-09-20 23:32:16,475 INFO L231 Difference]: Finished difference. Result has 334 places, 525 transitions, 5867 flow [2022-09-20 23:32:16,475 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5867, PETRI_PLACES=334, PETRI_TRANSITIONS=525} [2022-09-20 23:32:16,476 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 216 predicate places. [2022-09-20 23:32:16,476 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 525 transitions, 5867 flow [2022-09-20 23:32:16,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 69.48648648648648) internal successors, (2571), 37 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:16,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:16,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:32:16,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 23:32:16,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-09-20 23:32:16,700 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:32:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash 239242301, now seen corresponding path program 4 times [2022-09-20 23:32:16,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:16,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712222271] [2022-09-20 23:32:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:16,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712222271] [2022-09-20 23:32:18,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712222271] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952345103] [2022-09-20 23:32:18,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:32:18,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:18,424 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) [2022-09-20 23:32:18,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 23:32:18,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:32:18,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:32:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 58 conjunts are in the unsatisfiable core [2022-09-20 23:32:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:19,867 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 23:32:19,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2022-09-20 23:32:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:19,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:20,459 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:32:20,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2022-09-20 23:32:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952345103] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:32:22,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:32:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 23] total 70 [2022-09-20 23:32:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018205441] [2022-09-20 23:32:22,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:32:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-09-20 23:32:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:32:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-09-20 23:32:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4358, Unknown=0, NotChecked=0, Total=4830 [2022-09-20 23:32:22,332 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 133 [2022-09-20 23:32:22,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 525 transitions, 5867 flow. Second operand has 70 states, 70 states have (on average 55.8) internal successors, (3906), 70 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:22,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:32:22,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 133 [2022-09-20 23:32:22,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:32:34,180 INFO L130 PetriNetUnfolder]: 6576/25309 cut-off events. [2022-09-20 23:32:34,181 INFO L131 PetriNetUnfolder]: For 386784/387255 co-relation queries the response was YES. [2022-09-20 23:32:34,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132153 conditions, 25309 events. 6576/25309 cut-off events. For 386784/387255 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 325755 event pairs, 2585 based on Foata normal form. 138/23991 useless extension candidates. Maximal degree in co-relation 132063. Up to 9614 conditions per place. [2022-09-20 23:32:34,584 INFO L137 encePairwiseOnDemand]: 95/133 looper letters, 444 selfloop transitions, 230 changer transitions 48/771 dead transitions. [2022-09-20 23:32:34,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 771 transitions, 10589 flow [2022-09-20 23:32:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-09-20 23:32:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-09-20 23:32:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3264 transitions. [2022-09-20 23:32:34,588 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4305500593589236 [2022-09-20 23:32:34,588 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3264 transitions. [2022-09-20 23:32:34,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3264 transitions. [2022-09-20 23:32:34,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:32:34,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3264 transitions. [2022-09-20 23:32:34,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 57.26315789473684) internal successors, (3264), 57 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:34,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 133.0) internal successors, (7714), 58 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:34,601 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 133.0) internal successors, (7714), 58 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:34,601 INFO L175 Difference]: Start difference. First operand has 334 places, 525 transitions, 5867 flow. Second operand 57 states and 3264 transitions. [2022-09-20 23:32:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 771 transitions, 10589 flow [2022-09-20 23:32:35,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 771 transitions, 10187 flow, removed 84 selfloop flow, removed 30 redundant places. [2022-09-20 23:32:35,980 INFO L231 Difference]: Finished difference. Result has 378 places, 634 transitions, 7893 flow [2022-09-20 23:32:35,981 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=7893, PETRI_PLACES=378, PETRI_TRANSITIONS=634} [2022-09-20 23:32:35,981 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 260 predicate places. [2022-09-20 23:32:35,981 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 634 transitions, 7893 flow [2022-09-20 23:32:35,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 55.8) internal successors, (3906), 70 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:32:35,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:32:35,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:32:35,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-20 23:32:36,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:36,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:32:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:32:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash -523748377, now seen corresponding path program 5 times [2022-09-20 23:32:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:32:36,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153338739] [2022-09-20 23:32:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:32:36,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:32:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:32:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:32:37,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153338739] [2022-09-20 23:32:37,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153338739] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:32:37,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228919259] [2022-09-20 23:32:37,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:32:37,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:32:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:32:37,202 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) [2022-09-20 23:32:37,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 23:32:37,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-09-20 23:32:37,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:32:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 69 conjunts are in the unsatisfiable core [2022-09-20 23:32:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:32:37,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:32:37,338 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-09-20 23:32:37,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-09-20 23:32:37,698 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 23:32:37,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-09-20 23:32:37,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:32:38,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:32:38,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:32:38,896 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 23:32:38,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2022-09-20 23:32:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:32:38,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:32:41,423 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:41,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-09-20 23:32:41,461 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:32:41,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 537 [2022-09-20 23:32:41,500 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:32:41,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 497 treesize of output 487 [2022-09-20 23:32:41,543 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:32:41,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 387 [2022-09-20 23:32:42,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:32:42,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-09-20 23:32:42,493 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-09-20 23:32:42,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 242 [2022-09-20 23:32:42,519 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-09-20 23:32:42,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 192 [2022-09-20 23:32:42,546 INFO L356 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2022-09-20 23:32:42,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 167 [2022-09-20 23:33:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:02,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228919259] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:33:02,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:33:02,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 78 [2022-09-20 23:33:02,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757392253] [2022-09-20 23:33:02,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:33:02,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-09-20 23:33:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:33:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-09-20 23:33:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=5198, Unknown=44, NotChecked=0, Total=6006 [2022-09-20 23:33:02,534 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2022-09-20 23:33:02,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 634 transitions, 7893 flow. Second operand has 78 states, 78 states have (on average 57.35897435897436) internal successors, (4474), 78 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:02,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:33:02,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2022-09-20 23:33:02,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:33:17,098 INFO L130 PetriNetUnfolder]: 6827/26955 cut-off events. [2022-09-20 23:33:17,098 INFO L131 PetriNetUnfolder]: For 727409/728131 co-relation queries the response was YES. [2022-09-20 23:33:17,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165012 conditions, 26955 events. 6827/26955 cut-off events. For 727409/728131 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 351767 event pairs, 2730 based on Foata normal form. 111/25452 useless extension candidates. Maximal degree in co-relation 164904. Up to 12321 conditions per place. [2022-09-20 23:33:17,938 INFO L137 encePairwiseOnDemand]: 98/133 looper letters, 551 selfloop transitions, 169 changer transitions 59/830 dead transitions. [2022-09-20 23:33:17,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 830 transitions, 12977 flow [2022-09-20 23:33:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-09-20 23:33:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-09-20 23:33:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3672 transitions. [2022-09-20 23:33:17,945 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4453068154256609 [2022-09-20 23:33:17,945 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3672 transitions. [2022-09-20 23:33:17,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3672 transitions. [2022-09-20 23:33:17,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:33:17,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3672 transitions. [2022-09-20 23:33:17,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 59.225806451612904) internal successors, (3672), 62 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:17,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 133.0) internal successors, (8379), 63 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:17,967 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 133.0) internal successors, (8379), 63 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:17,968 INFO L175 Difference]: Start difference. First operand has 378 places, 634 transitions, 7893 flow. Second operand 62 states and 3672 transitions. [2022-09-20 23:33:17,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 830 transitions, 12977 flow [2022-09-20 23:33:20,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 830 transitions, 12609 flow, removed 145 selfloop flow, removed 37 redundant places. [2022-09-20 23:33:20,274 INFO L231 Difference]: Finished difference. Result has 420 places, 707 transitions, 9335 flow [2022-09-20 23:33:20,275 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=7619, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=9335, PETRI_PLACES=420, PETRI_TRANSITIONS=707} [2022-09-20 23:33:20,275 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 302 predicate places. [2022-09-20 23:33:20,275 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 707 transitions, 9335 flow [2022-09-20 23:33:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 57.35897435897436) internal successors, (4474), 78 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:20,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:33:20,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:33:20,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-09-20 23:33:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:33:20,477 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:33:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:33:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1149164827, now seen corresponding path program 6 times [2022-09-20 23:33:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:33:20,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827947131] [2022-09-20 23:33:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:33:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:33:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:33:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 23:33:20,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:33:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827947131] [2022-09-20 23:33:20,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827947131] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:33:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729387611] [2022-09-20 23:33:20,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:33:20,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:33:20,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:33:20,693 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) [2022-09-20 23:33:20,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 23:33:20,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 23:33:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:33:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 50 conjunts are in the unsatisfiable core [2022-09-20 23:33:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:33:21,751 INFO L356 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-09-20 23:33:21,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 17 [2022-09-20 23:33:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:21,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:33:22,220 INFO L356 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2022-09-20 23:33:22,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2022-09-20 23:33:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:23,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729387611] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:33:23,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:33:23,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 20] total 40 [2022-09-20 23:33:23,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338068968] [2022-09-20 23:33:23,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:33:23,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-09-20 23:33:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:33:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-09-20 23:33:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2022-09-20 23:33:23,513 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2022-09-20 23:33:23,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 707 transitions, 9335 flow. Second operand has 40 states, 40 states have (on average 75.65) internal successors, (3026), 40 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:23,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:33:23,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2022-09-20 23:33:23,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:33:41,629 INFO L130 PetriNetUnfolder]: 9867/36443 cut-off events. [2022-09-20 23:33:41,630 INFO L131 PetriNetUnfolder]: For 1086167/1087354 co-relation queries the response was YES. [2022-09-20 23:33:42,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246422 conditions, 36443 events. 9867/36443 cut-off events. For 1086167/1087354 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 484921 event pairs, 2222 based on Foata normal form. 258/34895 useless extension candidates. Maximal degree in co-relation 246295. Up to 7842 conditions per place. [2022-09-20 23:33:42,698 INFO L137 encePairwiseOnDemand]: 107/133 looper letters, 526 selfloop transitions, 935 changer transitions 114/1645 dead transitions. [2022-09-20 23:33:42,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1645 transitions, 28431 flow [2022-09-20 23:33:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-09-20 23:33:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-09-20 23:33:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 5691 transitions. [2022-09-20 23:33:42,704 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5861571737563086 [2022-09-20 23:33:42,704 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 5691 transitions. [2022-09-20 23:33:42,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 5691 transitions. [2022-09-20 23:33:42,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:33:42,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 5691 transitions. [2022-09-20 23:33:42,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 77.95890410958904) internal successors, (5691), 73 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:42,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 133.0) internal successors, (9842), 74 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:42,722 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 133.0) internal successors, (9842), 74 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:42,722 INFO L175 Difference]: Start difference. First operand has 420 places, 707 transitions, 9335 flow. Second operand 73 states and 5691 transitions. [2022-09-20 23:33:42,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1645 transitions, 28431 flow [2022-09-20 23:33:46,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1645 transitions, 27881 flow, removed 223 selfloop flow, removed 40 redundant places. [2022-09-20 23:33:46,891 INFO L231 Difference]: Finished difference. Result has 487 places, 1316 transitions, 22033 flow [2022-09-20 23:33:46,892 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=9063, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=22033, PETRI_PLACES=487, PETRI_TRANSITIONS=1316} [2022-09-20 23:33:46,893 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 369 predicate places. [2022-09-20 23:33:46,893 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1316 transitions, 22033 flow [2022-09-20 23:33:46,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 75.65) internal successors, (3026), 40 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:46,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:33:46,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:33:46,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-09-20 23:33:47,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-09-20 23:33:47,094 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:33:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:33:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash -814462869, now seen corresponding path program 7 times [2022-09-20 23:33:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:33:47,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734345238] [2022-09-20 23:33:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:33:47,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:33:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:33:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 23:33:47,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:33:47,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734345238] [2022-09-20 23:33:47,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734345238] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:33:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140489489] [2022-09-20 23:33:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:33:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:33:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:33:47,267 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) [2022-09-20 23:33:47,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 23:33:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:33:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 25 conjunts are in the unsatisfiable core [2022-09-20 23:33:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:33:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-09-20 23:33:47,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:33:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:48,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140489489] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:33:48,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:33:48,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 33 [2022-09-20 23:33:48,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567837093] [2022-09-20 23:33:48,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:33:48,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 23:33:48,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:33:48,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 23:33:48,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 23:33:48,174 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-09-20 23:33:48,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1316 transitions, 22033 flow. Second operand has 33 states, 33 states have (on average 97.15151515151516) internal successors, (3206), 33 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:48,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:33:48,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-09-20 23:33:48,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:34:02,198 INFO L130 PetriNetUnfolder]: 5632/24278 cut-off events. [2022-09-20 23:34:02,199 INFO L131 PetriNetUnfolder]: For 1026242/1027053 co-relation queries the response was YES. [2022-09-20 23:34:02,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179526 conditions, 24278 events. 5632/24278 cut-off events. For 1026242/1027053 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 312939 event pairs, 2830 based on Foata normal form. 92/22808 useless extension candidates. Maximal degree in co-relation 179366. Up to 9652 conditions per place. [2022-09-20 23:34:03,134 INFO L137 encePairwiseOnDemand]: 116/133 looper letters, 758 selfloop transitions, 17 changer transitions 60/997 dead transitions. [2022-09-20 23:34:03,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 997 transitions, 17601 flow [2022-09-20 23:34:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-09-20 23:34:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-09-20 23:34:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2240 transitions. [2022-09-20 23:34:03,138 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7322654462242563 [2022-09-20 23:34:03,138 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2240 transitions. [2022-09-20 23:34:03,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2240 transitions. [2022-09-20 23:34:03,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:34:03,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2240 transitions. [2022-09-20 23:34:03,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 97.3913043478261) internal successors, (2240), 23 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:03,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:03,145 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:03,145 INFO L175 Difference]: Start difference. First operand has 487 places, 1316 transitions, 22033 flow. Second operand 23 states and 2240 transitions. [2022-09-20 23:34:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 997 transitions, 17601 flow [2022-09-20 23:34:06,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 997 transitions, 15135 flow, removed 732 selfloop flow, removed 43 redundant places. [2022-09-20 23:34:06,876 INFO L231 Difference]: Finished difference. Result has 459 places, 932 transitions, 12364 flow [2022-09-20 23:34:06,876 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=12592, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12364, PETRI_PLACES=459, PETRI_TRANSITIONS=932} [2022-09-20 23:34:06,877 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 341 predicate places. [2022-09-20 23:34:06,877 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 932 transitions, 12364 flow [2022-09-20 23:34:06,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.15151515151516) internal successors, (3206), 33 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:06,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:34:06,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:34:06,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 23:34:07,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-20 23:34:07,078 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:34:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:34:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 64065559, now seen corresponding path program 8 times [2022-09-20 23:34:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:34:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556167601] [2022-09-20 23:34:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:34:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:34:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:34:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:34:07,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:34:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556167601] [2022-09-20 23:34:07,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556167601] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:34:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950206052] [2022-09-20 23:34:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:34:07,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:34:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:34:07,276 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) [2022-09-20 23:34:07,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 23:34:07,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:34:07,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:34:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2022-09-20 23:34:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:34:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:34:07,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:34:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:34:08,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950206052] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:34:08,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:34:08,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 39 [2022-09-20 23:34:08,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699940683] [2022-09-20 23:34:08,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:34:08,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-09-20 23:34:08,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:34:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-09-20 23:34:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2022-09-20 23:34:08,261 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-09-20 23:34:08,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 932 transitions, 12364 flow. Second operand has 39 states, 39 states have (on average 96.8974358974359) internal successors, (3779), 39 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:08,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:34:08,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-09-20 23:34:08,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:34:14,105 INFO L130 PetriNetUnfolder]: 2887/13264 cut-off events. [2022-09-20 23:34:14,105 INFO L131 PetriNetUnfolder]: For 544819/545622 co-relation queries the response was YES. [2022-09-20 23:34:14,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92384 conditions, 13264 events. 2887/13264 cut-off events. For 544819/545622 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 154863 event pairs, 1340 based on Foata normal form. 279/12623 useless extension candidates. Maximal degree in co-relation 92234. Up to 3251 conditions per place. [2022-09-20 23:34:14,301 INFO L137 encePairwiseOnDemand]: 115/133 looper letters, 297 selfloop transitions, 90 changer transitions 150/679 dead transitions. [2022-09-20 23:34:14,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 679 transitions, 10453 flow [2022-09-20 23:34:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-09-20 23:34:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-09-20 23:34:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2451 transitions. [2022-09-20 23:34:14,304 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7371428571428571 [2022-09-20 23:34:14,305 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2451 transitions. [2022-09-20 23:34:14,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2451 transitions. [2022-09-20 23:34:14,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:34:14,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2451 transitions. [2022-09-20 23:34:14,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 98.04) internal successors, (2451), 25 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:14,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 133.0) internal successors, (3458), 26 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:14,310 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 133.0) internal successors, (3458), 26 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:14,311 INFO L175 Difference]: Start difference. First operand has 459 places, 932 transitions, 12364 flow. Second operand 25 states and 2451 transitions. [2022-09-20 23:34:14,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 679 transitions, 10453 flow [2022-09-20 23:34:15,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 679 transitions, 10092 flow, removed 109 selfloop flow, removed 37 redundant places. [2022-09-20 23:34:15,732 INFO L231 Difference]: Finished difference. Result has 417 places, 503 transitions, 6276 flow [2022-09-20 23:34:15,733 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6276, PETRI_PLACES=417, PETRI_TRANSITIONS=503} [2022-09-20 23:34:15,733 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 299 predicate places. [2022-09-20 23:34:15,733 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 503 transitions, 6276 flow [2022-09-20 23:34:15,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 96.8974358974359) internal successors, (3779), 39 states have internal predecessors, (3779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:15,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:34:15,734 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:34:15,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-09-20 23:34:15,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-09-20 23:34:15,941 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:34:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:34:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1271434224, now seen corresponding path program 9 times [2022-09-20 23:34:15,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:34:15,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558599216] [2022-09-20 23:34:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:34:15,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:34:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:34:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:34:16,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:34:16,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558599216] [2022-09-20 23:34:16,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558599216] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:34:16,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819172085] [2022-09-20 23:34:16,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:34:16,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:34:16,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:34:16,152 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) [2022-09-20 23:34:16,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 23:34:16,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-09-20 23:34:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:34:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 23:34:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:34:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-20 23:34:16,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:34:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-20 23:34:16,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819172085] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:34:16,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:34:16,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 33 [2022-09-20 23:34:16,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827666236] [2022-09-20 23:34:16,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:34:16,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 23:34:16,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:34:16,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 23:34:16,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 23:34:16,893 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2022-09-20 23:34:16,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 503 transitions, 6276 flow. Second operand has 33 states, 33 states have (on average 96.81818181818181) internal successors, (3195), 33 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:16,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:34:16,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2022-09-20 23:34:16,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:34:20,249 INFO L130 PetriNetUnfolder]: 2013/9125 cut-off events. [2022-09-20 23:34:20,249 INFO L131 PetriNetUnfolder]: For 339506/339823 co-relation queries the response was YES. [2022-09-20 23:34:20,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 9125 events. 2013/9125 cut-off events. For 339506/339823 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 97440 event pairs, 1086 based on Foata normal form. 103/8584 useless extension candidates. Maximal degree in co-relation 62273. Up to 3279 conditions per place. [2022-09-20 23:34:20,539 INFO L137 encePairwiseOnDemand]: 117/133 looper letters, 183 selfloop transitions, 14 changer transitions 102/400 dead transitions. [2022-09-20 23:34:20,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 400 transitions, 5439 flow [2022-09-20 23:34:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-09-20 23:34:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-09-20 23:34:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2632 transitions. [2022-09-20 23:34:20,543 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.732943469785575 [2022-09-20 23:34:20,543 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2632 transitions. [2022-09-20 23:34:20,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2632 transitions. [2022-09-20 23:34:20,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:34:20,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2632 transitions. [2022-09-20 23:34:20,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.48148148148148) internal successors, (2632), 27 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:20,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:20,549 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:20,549 INFO L175 Difference]: Start difference. First operand has 417 places, 503 transitions, 6276 flow. Second operand 27 states and 2632 transitions. [2022-09-20 23:34:20,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 400 transitions, 5439 flow [2022-09-20 23:34:21,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 400 transitions, 4620 flow, removed 343 selfloop flow, removed 60 redundant places. [2022-09-20 23:34:21,101 INFO L231 Difference]: Finished difference. Result has 335 places, 295 transitions, 2699 flow [2022-09-20 23:34:21,102 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2699, PETRI_PLACES=335, PETRI_TRANSITIONS=295} [2022-09-20 23:34:21,102 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 217 predicate places. [2022-09-20 23:34:21,102 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 295 transitions, 2699 flow [2022-09-20 23:34:21,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.81818181818181) internal successors, (3195), 33 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:21,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:34:21,103 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:34:21,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-20 23:34:21,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-20 23:34:21,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:34:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:34:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash -313079633, now seen corresponding path program 10 times [2022-09-20 23:34:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:34:21,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145954328] [2022-09-20 23:34:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:34:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:34:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:34:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 23:34:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:34:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145954328] [2022-09-20 23:34:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145954328] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:34:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766849633] [2022-09-20 23:34:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:34:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:34:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:34:21,616 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) [2022-09-20 23:34:21,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 23:34:21,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:34:21,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:34:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 72 conjunts are in the unsatisfiable core [2022-09-20 23:34:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:34:23,215 INFO L356 Elim1Store]: treesize reduction 241, result has 4.0 percent of original size [2022-09-20 23:34:23,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 30 [2022-09-20 23:34:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:34:23,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:34:24,051 INFO L356 Elim1Store]: treesize reduction 168, result has 33.1 percent of original size [2022-09-20 23:34:24,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2022-09-20 23:34:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:34:27,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766849633] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:34:27,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:34:27,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 29, 28] total 60 [2022-09-20 23:34:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770100574] [2022-09-20 23:34:27,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:34:27,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-09-20 23:34:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:34:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-09-20 23:34:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=3115, Unknown=0, NotChecked=0, Total=3540 [2022-09-20 23:34:27,908 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2022-09-20 23:34:27,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 295 transitions, 2699 flow. Second operand has 60 states, 60 states have (on average 74.93333333333334) internal successors, (4496), 60 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:27,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:34:27,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2022-09-20 23:34:27,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:34:35,671 INFO L130 PetriNetUnfolder]: 3544/13806 cut-off events. [2022-09-20 23:34:35,672 INFO L131 PetriNetUnfolder]: For 214582/214782 co-relation queries the response was YES. [2022-09-20 23:34:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74717 conditions, 13806 events. 3544/13806 cut-off events. For 214582/214782 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 156832 event pairs, 1105 based on Foata normal form. 54/13068 useless extension candidates. Maximal degree in co-relation 74624. Up to 4382 conditions per place. [2022-09-20 23:34:35,813 INFO L137 encePairwiseOnDemand]: 103/133 looper letters, 398 selfloop transitions, 300 changer transitions 115/877 dead transitions. [2022-09-20 23:34:35,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 877 transitions, 12602 flow [2022-09-20 23:34:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-09-20 23:34:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-09-20 23:34:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6840 transitions. [2022-09-20 23:34:35,818 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2022-09-20 23:34:35,818 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6840 transitions. [2022-09-20 23:34:35,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6840 transitions. [2022-09-20 23:34:35,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:34:35,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6840 transitions. [2022-09-20 23:34:35,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 77.72727272727273) internal successors, (6840), 88 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:35,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 133.0) internal successors, (11837), 89 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:35,836 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 133.0) internal successors, (11837), 89 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:35,836 INFO L175 Difference]: Start difference. First operand has 335 places, 295 transitions, 2699 flow. Second operand 88 states and 6840 transitions. [2022-09-20 23:34:35,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 877 transitions, 12602 flow [2022-09-20 23:34:36,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 877 transitions, 10981 flow, removed 729 selfloop flow, removed 39 redundant places. [2022-09-20 23:34:36,240 INFO L231 Difference]: Finished difference. Result has 392 places, 558 transitions, 7107 flow [2022-09-20 23:34:36,240 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=7107, PETRI_PLACES=392, PETRI_TRANSITIONS=558} [2022-09-20 23:34:36,240 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 274 predicate places. [2022-09-20 23:34:36,241 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 558 transitions, 7107 flow [2022-09-20 23:34:36,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 74.93333333333334) internal successors, (4496), 60 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:34:36,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:34:36,242 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:34:36,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-20 23:34:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-20 23:34:36,448 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:34:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:34:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1745370175, now seen corresponding path program 11 times [2022-09-20 23:34:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:34:36,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304582660] [2022-09-20 23:34:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:34:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:34:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:34:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:34:37,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:34:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304582660] [2022-09-20 23:34:37,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304582660] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:34:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002995442] [2022-09-20 23:34:37,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:34:37,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:34:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:34:37,505 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) [2022-09-20 23:34:37,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-20 23:34:37,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-09-20 23:34:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:34:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 89 conjunts are in the unsatisfiable core [2022-09-20 23:34:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:34:37,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:34:37,678 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-09-20 23:34:37,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-09-20 23:34:37,983 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 23:34:37,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-09-20 23:34:38,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:34:38,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:34:38,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:34:40,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:34:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:34:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:34:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:34:40,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:34:40,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:34:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:34:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:34:40,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 23:34:40,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:34:40,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 30 [2022-09-20 23:34:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:34:40,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:34:43,477 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:34:43,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2022-09-20 23:34:43,541 INFO L356 Elim1Store]: treesize reduction 175, result has 31.6 percent of original size [2022-09-20 23:34:43,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 793 treesize of output 771 [2022-09-20 23:34:43,605 INFO L356 Elim1Store]: treesize reduction 175, result has 31.6 percent of original size [2022-09-20 23:34:43,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 691 treesize of output 615 [2022-09-20 23:34:43,672 INFO L356 Elim1Store]: treesize reduction 175, result has 31.6 percent of original size [2022-09-20 23:34:43,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 535 treesize of output 537 [2022-09-20 23:34:45,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:34:45,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2022-09-20 23:34:45,633 INFO L356 Elim1Store]: treesize reduction 243, result has 5.1 percent of original size [2022-09-20 23:34:45,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 793 treesize of output 703 [2022-09-20 23:34:45,672 INFO L356 Elim1Store]: treesize reduction 243, result has 5.1 percent of original size [2022-09-20 23:34:45,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 691 treesize of output 625 [2022-09-20 23:34:45,715 INFO L356 Elim1Store]: treesize reduction 243, result has 5.1 percent of original size [2022-09-20 23:34:45,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 613 treesize of output 469 [2022-09-20 23:35:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:35:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002995442] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:35:24,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:35:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 34] total 89 [2022-09-20 23:35:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115412772] [2022-09-20 23:35:24,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:35:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-09-20 23:35:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:35:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-09-20 23:35:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=6834, Unknown=54, NotChecked=0, Total=7832 [2022-09-20 23:35:24,777 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2022-09-20 23:35:24,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 558 transitions, 7107 flow. Second operand has 89 states, 89 states have (on average 57.449438202247194) internal successors, (5113), 89 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:35:24,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:35:24,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2022-09-20 23:35:24,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:35:37,957 INFO L130 PetriNetUnfolder]: 6229/23969 cut-off events. [2022-09-20 23:35:37,958 INFO L131 PetriNetUnfolder]: For 1109795/1110540 co-relation queries the response was YES. [2022-09-20 23:35:38,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179828 conditions, 23969 events. 6229/23969 cut-off events. For 1109795/1110540 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 300196 event pairs, 1827 based on Foata normal form. 120/22782 useless extension candidates. Maximal degree in co-relation 179700. Up to 5914 conditions per place. [2022-09-20 23:35:38,595 INFO L137 encePairwiseOnDemand]: 101/133 looper letters, 595 selfloop transitions, 408 changer transitions 193/1247 dead transitions. [2022-09-20 23:35:38,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1247 transitions, 22099 flow [2022-09-20 23:35:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-09-20 23:35:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-09-20 23:35:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3720 transitions. [2022-09-20 23:35:38,599 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.45852335757426355 [2022-09-20 23:35:38,599 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3720 transitions. [2022-09-20 23:35:38,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3720 transitions. [2022-09-20 23:35:38,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:35:38,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3720 transitions. [2022-09-20 23:35:38,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 60.98360655737705) internal successors, (3720), 61 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:35:38,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 133.0) internal successors, (8246), 62 states have internal predecessors, (8246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:35:38,610 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 133.0) internal successors, (8246), 62 states have internal predecessors, (8246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:35:38,610 INFO L175 Difference]: Start difference. First operand has 392 places, 558 transitions, 7107 flow. Second operand 61 states and 3720 transitions. [2022-09-20 23:35:38,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1247 transitions, 22099 flow [2022-09-20 23:35:44,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1247 transitions, 20170 flow, removed 932 selfloop flow, removed 35 redundant places. [2022-09-20 23:35:44,305 INFO L231 Difference]: Finished difference. Result has 435 places, 817 transitions, 11902 flow [2022-09-20 23:35:44,306 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=6322, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=11902, PETRI_PLACES=435, PETRI_TRANSITIONS=817} [2022-09-20 23:35:44,306 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 317 predicate places. [2022-09-20 23:35:44,306 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 817 transitions, 11902 flow [2022-09-20 23:35:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 57.449438202247194) internal successors, (5113), 89 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:35:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:35:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:35:44,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-09-20 23:35:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:35:44,511 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:35:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:35:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1694845669, now seen corresponding path program 12 times [2022-09-20 23:35:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:35:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173436561] [2022-09-20 23:35:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:35:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:35:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:35:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:35:45,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:35:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173436561] [2022-09-20 23:35:45,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173436561] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:35:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793709780] [2022-09-20 23:35:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:35:45,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:35:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:35:45,547 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:35:45,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-20 23:35:45,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 23:35:45,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:35:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 52 conjunts are in the unsatisfiable core [2022-09-20 23:35:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:35:46,290 INFO L356 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-09-20 23:35:46,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 22 [2022-09-20 23:35:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:35:46,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:35:46,786 INFO L356 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2022-09-20 23:35:46,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 150 [2022-09-20 23:35:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 23:35:47,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793709780] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:35:47,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:35:47,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17, 12] total 50 [2022-09-20 23:35:47,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644573563] [2022-09-20 23:35:47,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:35:47,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-09-20 23:35:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:35:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-09-20 23:35:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2172, Unknown=0, NotChecked=0, Total=2450 [2022-09-20 23:35:47,218 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2022-09-20 23:35:47,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 817 transitions, 11902 flow. Second operand has 50 states, 50 states have (on average 68.9) internal successors, (3445), 50 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:35:47,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:35:47,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2022-09-20 23:35:47,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:36:15,772 INFO L130 PetriNetUnfolder]: 10015/37349 cut-off events. [2022-09-20 23:36:15,772 INFO L131 PetriNetUnfolder]: For 2452328/2453369 co-relation queries the response was YES. [2022-09-20 23:36:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333034 conditions, 37349 events. 10015/37349 cut-off events. For 2452328/2453369 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 491297 event pairs, 1315 based on Foata normal form. 378/35861 useless extension candidates. Maximal degree in co-relation 332884. Up to 8215 conditions per place. [2022-09-20 23:36:17,108 INFO L137 encePairwiseOnDemand]: 108/133 looper letters, 713 selfloop transitions, 1078 changer transitions 280/2128 dead transitions. [2022-09-20 23:36:17,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2128 transitions, 46288 flow [2022-09-20 23:36:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-09-20 23:36:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2022-09-20 23:36:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 11478 transitions. [2022-09-20 23:36:17,117 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5327206906154275 [2022-09-20 23:36:17,118 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 11478 transitions. [2022-09-20 23:36:17,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 11478 transitions. [2022-09-20 23:36:17,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:36:17,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 11478 transitions. [2022-09-20 23:36:17,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 70.85185185185185) internal successors, (11478), 162 states have internal predecessors, (11478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:36:17,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 133.0) internal successors, (21679), 163 states have internal predecessors, (21679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:36:17,415 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 133.0) internal successors, (21679), 163 states have internal predecessors, (21679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:36:17,416 INFO L175 Difference]: Start difference. First operand has 435 places, 817 transitions, 11902 flow. Second operand 162 states and 11478 transitions. [2022-09-20 23:36:17,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2128 transitions, 46288 flow [2022-09-20 23:36:36,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 2128 transitions, 44883 flow, removed 680 selfloop flow, removed 25 redundant places. [2022-09-20 23:36:36,561 INFO L231 Difference]: Finished difference. Result has 684 places, 1379 transitions, 24982 flow [2022-09-20 23:36:36,562 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=11353, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=24982, PETRI_PLACES=684, PETRI_TRANSITIONS=1379} [2022-09-20 23:36:36,562 INFO L287 CegarLoopForPetriNet]: 118 programPoint places, 566 predicate places. [2022-09-20 23:36:36,563 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 1379 transitions, 24982 flow [2022-09-20 23:36:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 68.9) internal successors, (3445), 50 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:36:36,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:36:36,563 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:36:36,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-20 23:36:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:36:36,764 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:36:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:36:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1089509861, now seen corresponding path program 13 times [2022-09-20 23:36:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:36:36,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047225224] [2022-09-20 23:36:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:36:36,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:36:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:36:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 23:36:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:36:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047225224] [2022-09-20 23:36:37,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047225224] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:36:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149974260] [2022-09-20 23:36:37,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:36:37,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:36:37,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:36:37,008 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:36:37,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-20 23:36:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:36:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 93 conjunts are in the unsatisfiable core [2022-09-20 23:36:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:36:37,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:36:37,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 23:36:38,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:36:38,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:36:38,930 INFO L356 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-09-20 23:36:38,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 21 [2022-09-20 23:36:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:36:38,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:36:41,805 INFO L356 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-09-20 23:36:41,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 136 [2022-09-20 23:36:41,883 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-09-20 23:36:41,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 801 treesize of output 775 [2022-09-20 23:36:41,967 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-09-20 23:36:41,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 697 treesize of output 615 [2022-09-20 23:36:42,047 INFO L356 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-09-20 23:36:42,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 537 treesize of output 535 [2022-09-20 23:36:43,554 INFO L356 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-09-20 23:36:43,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 136 [2022-09-20 23:36:43,593 INFO L356 Elim1Store]: treesize reduction 248, result has 5.0 percent of original size [2022-09-20 23:36:43,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 341 [2022-09-20 23:36:43,629 INFO L356 Elim1Store]: treesize reduction 248, result has 5.0 percent of original size [2022-09-20 23:36:43,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 329 treesize of output 261 [2022-09-20 23:36:43,668 INFO L356 Elim1Store]: treesize reduction 248, result has 5.0 percent of original size [2022-09-20 23:36:43,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 221 [2022-09-20 23:36:43,783 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-09-20 23:36:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:36:44,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149974260] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:36:44,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:36:44,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 38, 35] total 76 [2022-09-20 23:36:44,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610839848] [2022-09-20 23:36:44,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:36:44,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-09-20 23:36:44,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:36:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-09-20 23:36:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=4563, Unknown=105, NotChecked=0, Total=5700 [2022-09-20 23:36:44,913 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2022-09-20 23:36:44,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 1379 transitions, 24982 flow. Second operand has 76 states, 76 states have (on average 60.69736842105263) internal successors, (4613), 76 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:36:44,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:36:44,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2022-09-20 23:36:44,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:37:31,181 INFO L130 PetriNetUnfolder]: 12172/43818 cut-off events. [2022-09-20 23:37:31,182 INFO L131 PetriNetUnfolder]: For 4197473/4199296 co-relation queries the response was YES.