/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/test-easy1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 20:11:53,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 20:11:53,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 20:11:53,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 20:11:53,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 20:11:53,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 20:11:53,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 20:11:53,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 20:11:53,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 20:11:53,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 20:11:53,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 20:11:53,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 20:11:53,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 20:11:53,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 20:11:53,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 20:11:53,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 20:11:53,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 20:11:53,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 20:11:53,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 20:11:53,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 20:11:53,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 20:11:53,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 20:11:53,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 20:11:53,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 20:11:53,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 20:11:53,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 20:11:53,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 20:11:53,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 20:11:53,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 20:11:53,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 20:11:53,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 20:11:53,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 20:11:53,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 20:11:53,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 20:11:53,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 20:11:53,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 20:11:53,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 20:11:53,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 20:11:53,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 20:11:53,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 20:11:53,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 20:11:53,924 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 [2022-12-11 20:11:53,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 20:11:53,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 20:11:53,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 20:11:53,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 20:11:53,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 20:11:53,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 20:11:53,980 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 20:11:53,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 20:11:53,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 20:11:53,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 20:11:53,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 20:11:53,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 20:11:53,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 20:11:53,982 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 20:11:53,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 20:11:53,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 20:11:53,983 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 20:11:53,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-11 20:11:54,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 20:11:54,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 20:11:54,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 20:11:54,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 20:11:54,288 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 20:11:54,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2022-12-11 20:11:55,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 20:11:55,376 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 20:11:55,377 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2022-12-11 20:11:55,381 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb470651/25d7d5a07de64affb3bbce77a4aab420/FLAGc3aff0276 [2022-12-11 20:11:55,390 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb470651/25d7d5a07de64affb3bbce77a4aab420 [2022-12-11 20:11:55,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 20:11:55,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 20:11:55,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 20:11:55,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 20:11:55,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 20:11:55,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9f0324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55, skipping insertion in model container [2022-12-11 20:11:55,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 20:11:55,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 20:11:55,517 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1876,1889] [2022-12-11 20:11:55,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 20:11:55,530 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 20:11:55,547 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1876,1889] [2022-12-11 20:11:55,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 20:11:55,565 INFO L208 MainTranslator]: Completed translation [2022-12-11 20:11:55,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55 WrapperNode [2022-12-11 20:11:55,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 20:11:55,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 20:11:55,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 20:11:55,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 20:11:55,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,596 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-12-11 20:11:55,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 20:11:55,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 20:11:55,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 20:11:55,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 20:11:55,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 20:11:55,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 20:11:55,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 20:11:55,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 20:11:55,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (1/1) ... [2022-12-11 20:11:55,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 20:11:55,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:11:55,650 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) [2022-12-11 20:11:55,659 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 [2022-12-11 20:11:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-11 20:11:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-11 20:11:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 20:11:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-11 20:11:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 20:11:55,682 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 20:11:55,760 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 20:11:55,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 20:11:55,925 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 20:11:55,930 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 20:11:55,930 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-11 20:11:55,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 08:11:55 BoogieIcfgContainer [2022-12-11 20:11:55,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 20:11:55,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 20:11:55,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 20:11:55,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 20:11:55,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 08:11:55" (1/3) ... [2022-12-11 20:11:55,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c60c793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 08:11:55, skipping insertion in model container [2022-12-11 20:11:55,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:11:55" (2/3) ... [2022-12-11 20:11:55,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c60c793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 08:11:55, skipping insertion in model container [2022-12-11 20:11:55,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 08:11:55" (3/3) ... [2022-12-11 20:11:55,937 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-12-11 20:11:55,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 20:11:55,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 20:11:55,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 20:11:55,994 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-11 20:11:56,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2022-12-11 20:11:56,049 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-12-11 20:11:56,049 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 20:11:56,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2022-12-11 20:11:56,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2022-12-11 20:11:56,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2022-12-11 20:11:56,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 20:11:56,067 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;@639b47e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 20:11:56,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 20:11:56,089 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2022-12-11 20:11:56,089 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 20:11:56,089 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:11:56,090 INFO L214 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] [2022-12-11 20:11:56,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:11:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:11:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash 923988368, now seen corresponding path program 1 times [2022-12-11 20:11:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:11:56,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138020709] [2022-12-11 20:11:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:56,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:11:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:56,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:11:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138020709] [2022-12-11 20:11:56,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138020709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:11:56,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:11:56,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-11 20:11:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415893828] [2022-12-11 20:11:56,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:11:56,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-11 20:11:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:11:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-11 20:11:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-11 20:11:56,638 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 77 [2022-12-11 20:11:56,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:56,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:11:56,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 77 [2022-12-11 20:11:56,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:11:56,782 INFO L130 PetriNetUnfolder]: 56/199 cut-off events. [2022-12-11 20:11:56,783 INFO L131 PetriNetUnfolder]: For 55/68 co-relation queries the response was YES. [2022-12-11 20:11:56,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 199 events. 56/199 cut-off events. For 55/68 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 684 event pairs, 15 based on Foata normal form. 4/171 useless extension candidates. Maximal degree in co-relation 228. Up to 75 conditions per place. [2022-12-11 20:11:56,785 INFO L137 encePairwiseOnDemand]: 63/77 looper letters, 29 selfloop transitions, 5 changer transitions 7/78 dead transitions. [2022-12-11 20:11:56,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 259 flow [2022-12-11 20:11:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 20:11:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 20:11:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 463 transitions. [2022-12-11 20:11:56,796 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6681096681096681 [2022-12-11 20:11:56,797 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 9 states and 463 transitions. [2022-12-11 20:11:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 259 flow [2022-12-11 20:11:56,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 78 transitions, 245 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-11 20:11:56,802 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 153 flow [2022-12-11 20:11:56,803 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=153, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2022-12-11 20:11:56,805 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 7 predicate places. [2022-12-11 20:11:56,805 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 153 flow [2022-12-11 20:11:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:56,806 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:11:56,806 INFO L214 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] [2022-12-11 20:11:56,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 20:11:56,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:11:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:11:56,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1948096777, now seen corresponding path program 1 times [2022-12-11 20:11:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:11:56,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959345888] [2022-12-11 20:11:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:56,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:11:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:56,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:11:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959345888] [2022-12-11 20:11:56,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959345888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:11:56,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:11:56,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-11 20:11:56,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105813783] [2022-12-11 20:11:56,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:11:56,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-11 20:11:56,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:11:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-11 20:11:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-11 20:11:56,988 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 77 [2022-12-11 20:11:56,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 153 flow. Second operand has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:56,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:11:56,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 77 [2022-12-11 20:11:56,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:11:57,133 INFO L130 PetriNetUnfolder]: 54/224 cut-off events. [2022-12-11 20:11:57,133 INFO L131 PetriNetUnfolder]: For 23/30 co-relation queries the response was YES. [2022-12-11 20:11:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 224 events. 54/224 cut-off events. For 23/30 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 862 event pairs, 7 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 397. Up to 56 conditions per place. [2022-12-11 20:11:57,135 INFO L137 encePairwiseOnDemand]: 66/77 looper letters, 38 selfloop transitions, 11 changer transitions 1/87 dead transitions. [2022-12-11 20:11:57,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 316 flow [2022-12-11 20:11:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-11 20:11:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-11 20:11:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 375 transitions. [2022-12-11 20:11:57,145 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6957328385899815 [2022-12-11 20:11:57,145 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 153 flow. Second operand 7 states and 375 transitions. [2022-12-11 20:11:57,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 316 flow [2022-12-11 20:11:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 87 transitions, 301 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-11 20:11:57,148 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 200 flow [2022-12-11 20:11:57,148 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2022-12-11 20:11:57,149 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2022-12-11 20:11:57,149 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 200 flow [2022-12-11 20:11:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:57,152 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:11:57,152 INFO L214 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] [2022-12-11 20:11:57,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-11 20:11:57,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:11:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:11:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1241968789, now seen corresponding path program 2 times [2022-12-11 20:11:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:11:57,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368078239] [2022-12-11 20:11:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:57,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:11:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:57,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:11:57,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368078239] [2022-12-11 20:11:57,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368078239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:11:57,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:11:57,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 20:11:57,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181339828] [2022-12-11 20:11:57,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:11:57,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 20:11:57,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:11:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 20:11:57,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-11 20:11:57,297 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 77 [2022-12-11 20:11:57,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:57,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:11:57,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 77 [2022-12-11 20:11:57,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:11:57,385 INFO L130 PetriNetUnfolder]: 49/192 cut-off events. [2022-12-11 20:11:57,385 INFO L131 PetriNetUnfolder]: For 152/165 co-relation queries the response was YES. [2022-12-11 20:11:57,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 192 events. 49/192 cut-off events. For 152/165 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 651 event pairs, 7 based on Foata normal form. 5/190 useless extension candidates. Maximal degree in co-relation 260. Up to 81 conditions per place. [2022-12-11 20:11:57,390 INFO L137 encePairwiseOnDemand]: 68/77 looper letters, 29 selfloop transitions, 5 changer transitions 7/78 dead transitions. [2022-12-11 20:11:57,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 328 flow [2022-12-11 20:11:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 20:11:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 20:11:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2022-12-11 20:11:57,391 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.683982683982684 [2022-12-11 20:11:57,391 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 200 flow. Second operand 6 states and 316 transitions. [2022-12-11 20:11:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 328 flow [2022-12-11 20:11:57,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 321 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-11 20:11:57,396 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 214 flow [2022-12-11 20:11:57,396 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2022-12-11 20:11:57,397 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2022-12-11 20:11:57,397 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 214 flow [2022-12-11 20:11:57,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:57,397 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:11:57,397 INFO L214 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] [2022-12-11 20:11:57,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-11 20:11:57,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:11:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:11:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 522486659, now seen corresponding path program 1 times [2022-12-11 20:11:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:11:57,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212811652] [2022-12-11 20:11:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:11:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:57,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:11:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212811652] [2022-12-11 20:11:57,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212811652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:11:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345804175] [2022-12-11 20:11:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:57,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:11:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:11:57,573 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) [2022-12-11 20:11:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-11 20:11:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:57,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-11 20:11:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:11:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:57,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:11:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:57,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345804175] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-11 20:11:57,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-11 20:11:57,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-12-11 20:11:57,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172791209] [2022-12-11 20:11:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:11:57,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 20:11:57,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:11:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 20:11:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-12-11 20:11:57,938 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 77 [2022-12-11 20:11:57,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:57,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:11:57,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 77 [2022-12-11 20:11:57,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:11:58,011 INFO L130 PetriNetUnfolder]: 46/177 cut-off events. [2022-12-11 20:11:58,011 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-12-11 20:11:58,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 177 events. 46/177 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 496 event pairs, 13 based on Foata normal form. 4/177 useless extension candidates. Maximal degree in co-relation 219. Up to 54 conditions per place. [2022-12-11 20:11:58,013 INFO L137 encePairwiseOnDemand]: 67/77 looper letters, 33 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2022-12-11 20:11:58,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 370 flow [2022-12-11 20:11:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 20:11:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 20:11:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2022-12-11 20:11:58,016 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6861471861471862 [2022-12-11 20:11:58,016 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 214 flow. Second operand 6 states and 317 transitions. [2022-12-11 20:11:58,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 370 flow [2022-12-11 20:11:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 340 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-12-11 20:11:58,022 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 249 flow [2022-12-11 20:11:58,022 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-12-11 20:11:58,023 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2022-12-11 20:11:58,024 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 249 flow [2022-12-11 20:11:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:58,024 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:11:58,024 INFO L214 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] [2022-12-11 20:11:58,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-11 20:11:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:11:58,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:11:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:11:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1431380960, now seen corresponding path program 1 times [2022-12-11 20:11:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:11:58,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718885818] [2022-12-11 20:11:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:58,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:11:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:11:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718885818] [2022-12-11 20:11:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718885818] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:11:58,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78282890] [2022-12-11 20:11:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:11:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:11:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:11:58,382 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) [2022-12-11 20:11:58,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-11 20:11:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:11:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 20:11:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:11:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:58,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:11:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:11:58,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78282890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:11:58,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:11:58,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-12-11 20:11:58,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940095174] [2022-12-11 20:11:58,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:11:58,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-11 20:11:58,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:11:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-11 20:11:58,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-12-11 20:11:58,771 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:11:58,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 249 flow. Second operand has 24 states, 24 states have (on average 46.583333333333336) internal successors, (1118), 24 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:58,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:11:58,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:11:58,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:11:59,864 INFO L130 PetriNetUnfolder]: 141/411 cut-off events. [2022-12-11 20:11:59,864 INFO L131 PetriNetUnfolder]: For 607/607 co-relation queries the response was YES. [2022-12-11 20:11:59,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 411 events. 141/411 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1894 event pairs, 0 based on Foata normal form. 20/431 useless extension candidates. Maximal degree in co-relation 867. Up to 58 conditions per place. [2022-12-11 20:11:59,866 INFO L137 encePairwiseOnDemand]: 59/77 looper letters, 75 selfloop transitions, 69 changer transitions 36/215 dead transitions. [2022-12-11 20:11:59,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 215 transitions, 1319 flow [2022-12-11 20:11:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-11 20:11:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-11 20:11:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2202 transitions. [2022-12-11 20:11:59,871 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6216826651609261 [2022-12-11 20:11:59,871 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 249 flow. Second operand 46 states and 2202 transitions. [2022-12-11 20:11:59,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 215 transitions, 1319 flow [2022-12-11 20:11:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 215 transitions, 1315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-11 20:11:59,875 INFO L231 Difference]: Finished difference. Result has 138 places, 134 transitions, 848 flow [2022-12-11 20:11:59,875 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=848, PETRI_PLACES=138, PETRI_TRANSITIONS=134} [2022-12-11 20:11:59,875 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2022-12-11 20:11:59,876 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 134 transitions, 848 flow [2022-12-11 20:11:59,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 46.583333333333336) internal successors, (1118), 24 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:11:59,876 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:11:59,876 INFO L214 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] [2022-12-11 20:11:59,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-11 20:12:00,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:00,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash 159769620, now seen corresponding path program 2 times [2022-12-11 20:12:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178208597] [2022-12-11 20:12:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:00,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:00,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178208597] [2022-12-11 20:12:00,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178208597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147928649] [2022-12-11 20:12:00,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:12:00,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:00,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:00,260 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) [2022-12-11 20:12:00,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-11 20:12:00,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 20:12:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 20:12:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:00,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:12:00,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147928649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:00,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:00,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-12-11 20:12:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592804733] [2022-12-11 20:12:00,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:00,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-11 20:12:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-11 20:12:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-12-11 20:12:00,685 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:00,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 134 transitions, 848 flow. Second operand has 24 states, 24 states have (on average 46.583333333333336) internal successors, (1118), 24 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:00,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:00,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:00,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:01,564 INFO L130 PetriNetUnfolder]: 222/610 cut-off events. [2022-12-11 20:12:01,565 INFO L131 PetriNetUnfolder]: For 3026/3026 co-relation queries the response was YES. [2022-12-11 20:12:01,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2712 conditions, 610 events. 222/610 cut-off events. For 3026/3026 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3123 event pairs, 21 based on Foata normal form. 11/615 useless extension candidates. Maximal degree in co-relation 2675. Up to 172 conditions per place. [2022-12-11 20:12:01,570 INFO L137 encePairwiseOnDemand]: 58/77 looper letters, 120 selfloop transitions, 153 changer transitions 21/329 dead transitions. [2022-12-11 20:12:01,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 329 transitions, 3003 flow [2022-12-11 20:12:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-11 20:12:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-11 20:12:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1869 transitions. [2022-12-11 20:12:01,574 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6223776223776224 [2022-12-11 20:12:01,574 INFO L175 Difference]: Start difference. First operand has 138 places, 134 transitions, 848 flow. Second operand 39 states and 1869 transitions. [2022-12-11 20:12:01,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 329 transitions, 3003 flow [2022-12-11 20:12:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 329 transitions, 2714 flow, removed 132 selfloop flow, removed 10 redundant places. [2022-12-11 20:12:01,587 INFO L231 Difference]: Finished difference. Result has 180 places, 269 transitions, 2433 flow [2022-12-11 20:12:01,588 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2433, PETRI_PLACES=180, PETRI_TRANSITIONS=269} [2022-12-11 20:12:01,588 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 112 predicate places. [2022-12-11 20:12:01,588 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 269 transitions, 2433 flow [2022-12-11 20:12:01,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 46.583333333333336) internal successors, (1118), 24 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:01,589 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:01,589 INFO L214 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] [2022-12-11 20:12:01,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:01,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:01,793 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1311794644, now seen corresponding path program 3 times [2022-12-11 20:12:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:01,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106351203] [2022-12-11 20:12:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:01,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106351203] [2022-12-11 20:12:01,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106351203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628423159] [2022-12-11 20:12:01,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 20:12:01,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:01,929 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) [2022-12-11 20:12:01,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-11 20:12:01,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-11 20:12:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 20:12:01,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:02,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:02,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628423159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:02,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:02,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-12-11 20:12:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259828104] [2022-12-11 20:12:02,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-11 20:12:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-11 20:12:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-12-11 20:12:02,345 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:02,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 269 transitions, 2433 flow. Second operand has 24 states, 24 states have (on average 46.583333333333336) internal successors, (1118), 24 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:02,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:02,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:02,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:03,785 INFO L130 PetriNetUnfolder]: 412/1114 cut-off events. [2022-12-11 20:12:03,786 INFO L131 PetriNetUnfolder]: For 8502/8508 co-relation queries the response was YES. [2022-12-11 20:12:03,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5995 conditions, 1114 events. 412/1114 cut-off events. For 8502/8508 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6949 event pairs, 9 based on Foata normal form. 20/1129 useless extension candidates. Maximal degree in co-relation 5941. Up to 182 conditions per place. [2022-12-11 20:12:03,796 INFO L137 encePairwiseOnDemand]: 59/77 looper letters, 189 selfloop transitions, 416 changer transitions 25/665 dead transitions. [2022-12-11 20:12:03,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 665 transitions, 7856 flow [2022-12-11 20:12:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-11 20:12:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-11 20:12:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3003 transitions. [2022-12-11 20:12:03,799 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2022-12-11 20:12:03,799 INFO L175 Difference]: Start difference. First operand has 180 places, 269 transitions, 2433 flow. Second operand 63 states and 3003 transitions. [2022-12-11 20:12:03,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 665 transitions, 7856 flow [2022-12-11 20:12:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 665 transitions, 7419 flow, removed 144 selfloop flow, removed 8 redundant places. [2022-12-11 20:12:03,871 INFO L231 Difference]: Finished difference. Result has 261 places, 580 transitions, 7039 flow [2022-12-11 20:12:03,871 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=7039, PETRI_PLACES=261, PETRI_TRANSITIONS=580} [2022-12-11 20:12:03,872 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 193 predicate places. [2022-12-11 20:12:03,872 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 580 transitions, 7039 flow [2022-12-11 20:12:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 46.583333333333336) internal successors, (1118), 24 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:03,872 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:03,873 INFO L214 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] [2022-12-11 20:12:03,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-11 20:12:04,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:04,079 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 518382940, now seen corresponding path program 4 times [2022-12-11 20:12:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770402656] [2022-12-11 20:12:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:04,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770402656] [2022-12-11 20:12:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770402656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175092203] [2022-12-11 20:12:04,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 20:12:04,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:04,222 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) [2022-12-11 20:12:04,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-11 20:12:04,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 20:12:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:04,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 20:12:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:04,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:12:04,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175092203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:04,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:04,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-12-11 20:12:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355796767] [2022-12-11 20:12:04,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-11 20:12:04,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-11 20:12:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-12-11 20:12:04,582 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:04,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 580 transitions, 7039 flow. Second operand has 24 states, 24 states have (on average 46.541666666666664) internal successors, (1117), 24 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:04,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:04,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:04,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:05,694 INFO L130 PetriNetUnfolder]: 565/1483 cut-off events. [2022-12-11 20:12:05,694 INFO L131 PetriNetUnfolder]: For 17707/17707 co-relation queries the response was YES. [2022-12-11 20:12:05,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9867 conditions, 1483 events. 565/1483 cut-off events. For 17707/17707 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10003 event pairs, 17 based on Foata normal form. 15/1492 useless extension candidates. Maximal degree in co-relation 9779. Up to 552 conditions per place. [2022-12-11 20:12:05,710 INFO L137 encePairwiseOnDemand]: 58/77 looper letters, 393 selfloop transitions, 457 changer transitions 11/896 dead transitions. [2022-12-11 20:12:05,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 896 transitions, 13078 flow [2022-12-11 20:12:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-11 20:12:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-11 20:12:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2089 transitions. [2022-12-11 20:12:05,715 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6165879574970484 [2022-12-11 20:12:05,715 INFO L175 Difference]: Start difference. First operand has 261 places, 580 transitions, 7039 flow. Second operand 44 states and 2089 transitions. [2022-12-11 20:12:05,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 896 transitions, 13078 flow [2022-12-11 20:12:05,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 896 transitions, 11867 flow, removed 455 selfloop flow, removed 12 redundant places. [2022-12-11 20:12:05,854 INFO L231 Difference]: Finished difference. Result has 310 places, 845 transitions, 11498 flow [2022-12-11 20:12:05,855 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11498, PETRI_PLACES=310, PETRI_TRANSITIONS=845} [2022-12-11 20:12:05,857 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 242 predicate places. [2022-12-11 20:12:05,857 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 845 transitions, 11498 flow [2022-12-11 20:12:05,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 46.541666666666664) internal successors, (1117), 24 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:05,858 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:05,858 INFO L214 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] [2022-12-11 20:12:05,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:06,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:06,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash -527417614, now seen corresponding path program 5 times [2022-12-11 20:12:06,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008674539] [2022-12-11 20:12:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:06,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:06,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008674539] [2022-12-11 20:12:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008674539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353130121] [2022-12-11 20:12:06,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 20:12:06,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:06,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:06,186 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) [2022-12-11 20:12:06,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-11 20:12:06,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-11 20:12:06,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-11 20:12:06,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:06,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353130121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:06,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:06,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-12-11 20:12:06,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90825955] [2022-12-11 20:12:06,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:06,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-11 20:12:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-11 20:12:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-12-11 20:12:06,564 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:06,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 845 transitions, 11498 flow. Second operand has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:06,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:06,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:06,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:07,494 INFO L130 PetriNetUnfolder]: 791/2062 cut-off events. [2022-12-11 20:12:07,494 INFO L131 PetriNetUnfolder]: For 29863/29863 co-relation queries the response was YES. [2022-12-11 20:12:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14911 conditions, 2062 events. 791/2062 cut-off events. For 29863/29863 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15205 event pairs, 23 based on Foata normal form. 1/2052 useless extension candidates. Maximal degree in co-relation 14806. Up to 646 conditions per place. [2022-12-11 20:12:07,521 INFO L137 encePairwiseOnDemand]: 60/77 looper letters, 421 selfloop transitions, 796 changer transitions 28/1280 dead transitions. [2022-12-11 20:12:07,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1280 transitions, 20470 flow [2022-12-11 20:12:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-11 20:12:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-11 20:12:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1327 transitions. [2022-12-11 20:12:07,523 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.615491651205937 [2022-12-11 20:12:07,523 INFO L175 Difference]: Start difference. First operand has 310 places, 845 transitions, 11498 flow. Second operand 28 states and 1327 transitions. [2022-12-11 20:12:07,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1280 transitions, 20470 flow [2022-12-11 20:12:07,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1280 transitions, 19708 flow, removed 360 selfloop flow, removed 8 redundant places. [2022-12-11 20:12:07,764 INFO L231 Difference]: Finished difference. Result has 346 places, 1181 transitions, 18630 flow [2022-12-11 20:12:07,764 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=11049, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18630, PETRI_PLACES=346, PETRI_TRANSITIONS=1181} [2022-12-11 20:12:07,765 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 278 predicate places. [2022-12-11 20:12:07,765 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1181 transitions, 18630 flow [2022-12-11 20:12:07,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:07,766 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:07,766 INFO L214 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] [2022-12-11 20:12:07,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-11 20:12:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:07,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -706809478, now seen corresponding path program 6 times [2022-12-11 20:12:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771860363] [2022-12-11 20:12:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:08,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:08,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771860363] [2022-12-11 20:12:08,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771860363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:08,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025753679] [2022-12-11 20:12:08,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 20:12:08,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:08,125 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) [2022-12-11 20:12:08,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-11 20:12:08,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-11 20:12:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 20:12:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:08,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-11 20:12:08,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025753679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:12:08,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-11 20:12:08,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-12-11 20:12:08,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504464340] [2022-12-11 20:12:08,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:12:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-11 20:12:08,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:08,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-11 20:12:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-12-11 20:12:08,369 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:08,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1181 transitions, 18630 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:08,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:08,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:09,540 INFO L130 PetriNetUnfolder]: 889/2284 cut-off events. [2022-12-11 20:12:09,540 INFO L131 PetriNetUnfolder]: For 38734/38734 co-relation queries the response was YES. [2022-12-11 20:12:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18209 conditions, 2284 events. 889/2284 cut-off events. For 38734/38734 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17192 event pairs, 42 based on Foata normal form. 2/2271 useless extension candidates. Maximal degree in co-relation 18086. Up to 1689 conditions per place. [2022-12-11 20:12:09,574 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1151 selfloop transitions, 157 changer transitions 9/1352 dead transitions. [2022-12-11 20:12:09,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1352 transitions, 24262 flow [2022-12-11 20:12:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-11 20:12:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-11 20:12:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1016 transitions. [2022-12-11 20:12:09,576 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6283240568954854 [2022-12-11 20:12:09,576 INFO L175 Difference]: Start difference. First operand has 346 places, 1181 transitions, 18630 flow. Second operand 21 states and 1016 transitions. [2022-12-11 20:12:09,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1352 transitions, 24262 flow [2022-12-11 20:12:09,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1352 transitions, 23916 flow, removed 171 selfloop flow, removed 7 redundant places. [2022-12-11 20:12:09,980 INFO L231 Difference]: Finished difference. Result has 364 places, 1289 transitions, 20844 flow [2022-12-11 20:12:09,981 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=18390, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20844, PETRI_PLACES=364, PETRI_TRANSITIONS=1289} [2022-12-11 20:12:09,982 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 296 predicate places. [2022-12-11 20:12:09,982 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1289 transitions, 20844 flow [2022-12-11 20:12:09,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:09,982 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:09,982 INFO L214 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] [2022-12-11 20:12:09,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:10,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1883757880, now seen corresponding path program 7 times [2022-12-11 20:12:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:10,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352647613] [2022-12-11 20:12:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:10,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352647613] [2022-12-11 20:12:10,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352647613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351629081] [2022-12-11 20:12:10,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 20:12:10,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:10,306 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) [2022-12-11 20:12:10,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-11 20:12:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-11 20:12:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:10,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:10,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351629081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:10,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:10,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-12-11 20:12:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488177703] [2022-12-11 20:12:10,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:10,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-11 20:12:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-11 20:12:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-11 20:12:10,652 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:10,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1289 transitions, 20844 flow. Second operand has 21 states, 21 states have (on average 46.04761904761905) internal successors, (967), 21 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:10,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:10,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:10,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:12,060 INFO L130 PetriNetUnfolder]: 1165/3112 cut-off events. [2022-12-11 20:12:12,061 INFO L131 PetriNetUnfolder]: For 52159/52159 co-relation queries the response was YES. [2022-12-11 20:12:12,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24433 conditions, 3112 events. 1165/3112 cut-off events. For 52159/52159 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26053 event pairs, 32 based on Foata normal form. 1/3101 useless extension candidates. Maximal degree in co-relation 24293. Up to 621 conditions per place. [2022-12-11 20:12:12,103 INFO L137 encePairwiseOnDemand]: 60/77 looper letters, 418 selfloop transitions, 1284 changer transitions 24/1761 dead transitions. [2022-12-11 20:12:12,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1761 transitions, 32239 flow [2022-12-11 20:12:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-11 20:12:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-11 20:12:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1106 transitions. [2022-12-11 20:12:12,105 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6245059288537549 [2022-12-11 20:12:12,105 INFO L175 Difference]: Start difference. First operand has 364 places, 1289 transitions, 20844 flow. Second operand 23 states and 1106 transitions. [2022-12-11 20:12:12,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1761 transitions, 32239 flow [2022-12-11 20:12:12,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1761 transitions, 31960 flow, removed 118 selfloop flow, removed 7 redundant places. [2022-12-11 20:12:12,653 INFO L231 Difference]: Finished difference. Result has 389 places, 1657 transitions, 31317 flow [2022-12-11 20:12:12,654 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=20662, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=31317, PETRI_PLACES=389, PETRI_TRANSITIONS=1657} [2022-12-11 20:12:12,655 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 321 predicate places. [2022-12-11 20:12:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1657 transitions, 31317 flow [2022-12-11 20:12:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.04761904761905) internal successors, (967), 21 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:12,655 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:12,655 INFO L214 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] [2022-12-11 20:12:12,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:12,855 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,SelfDestructingSolverStorable10 [2022-12-11 20:12:12,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2068763040, now seen corresponding path program 8 times [2022-12-11 20:12:12,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348470446] [2022-12-11 20:12:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:13,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348470446] [2022-12-11 20:12:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348470446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067163717] [2022-12-11 20:12:13,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:12:13,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:13,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:13,055 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) [2022-12-11 20:12:13,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-11 20:12:13,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 20:12:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 20:12:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:13,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-11 20:12:13,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067163717] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:12:13,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-11 20:12:13,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-12-11 20:12:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419846635] [2022-12-11 20:12:13,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:12:13,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-11 20:12:13,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-11 20:12:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-12-11 20:12:13,272 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:13,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1657 transitions, 31317 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:13,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:13,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:13,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:15,059 INFO L130 PetriNetUnfolder]: 1394/3611 cut-off events. [2022-12-11 20:12:15,060 INFO L131 PetriNetUnfolder]: For 80914/80914 co-relation queries the response was YES. [2022-12-11 20:12:15,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33045 conditions, 3611 events. 1394/3611 cut-off events. For 80914/80914 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 30531 event pairs, 44 based on Foata normal form. 4/3600 useless extension candidates. Maximal degree in co-relation 32889. Up to 2494 conditions per place. [2022-12-11 20:12:15,110 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1704 selfloop transitions, 293 changer transitions 9/2041 dead transitions. [2022-12-11 20:12:15,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 2041 transitions, 43788 flow [2022-12-11 20:12:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-11 20:12:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-11 20:12:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 798 transitions. [2022-12-11 20:12:15,112 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-12-11 20:12:15,112 INFO L175 Difference]: Start difference. First operand has 389 places, 1657 transitions, 31317 flow. Second operand 16 states and 798 transitions. [2022-12-11 20:12:15,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 2041 transitions, 43788 flow [2022-12-11 20:12:16,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 2041 transitions, 43220 flow, removed 280 selfloop flow, removed 6 redundant places. [2022-12-11 20:12:16,157 INFO L231 Difference]: Finished difference. Result has 405 places, 1891 transitions, 37643 flow [2022-12-11 20:12:16,159 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=31023, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=37643, PETRI_PLACES=405, PETRI_TRANSITIONS=1891} [2022-12-11 20:12:16,159 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 337 predicate places. [2022-12-11 20:12:16,159 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1891 transitions, 37643 flow [2022-12-11 20:12:16,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:16,160 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:16,160 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:12:16,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-11 20:12:16,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:16,360 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1164597879, now seen corresponding path program 9 times [2022-12-11 20:12:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:16,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792751814] [2022-12-11 20:12:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:16,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:12:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792751814] [2022-12-11 20:12:16,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792751814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479839184] [2022-12-11 20:12:16,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 20:12:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:16,485 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) [2022-12-11 20:12:16,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-11 20:12:16,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-11 20:12:16,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:16,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:12:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:16,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:16,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479839184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:16,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:16,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-12-11 20:12:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601566612] [2022-12-11 20:12:16,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-11 20:12:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-11 20:12:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-12-11 20:12:16,898 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:16,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1891 transitions, 37643 flow. Second operand has 26 states, 26 states have (on average 46.76923076923077) internal successors, (1216), 26 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:16,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:16,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:16,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:20,360 INFO L130 PetriNetUnfolder]: 1581/4158 cut-off events. [2022-12-11 20:12:20,360 INFO L131 PetriNetUnfolder]: For 83386/83386 co-relation queries the response was YES. [2022-12-11 20:12:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37624 conditions, 4158 events. 1581/4158 cut-off events. For 83386/83386 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36578 event pairs, 1 based on Foata normal form. 19/4177 useless extension candidates. Maximal degree in co-relation 37451. Up to 831 conditions per place. [2022-12-11 20:12:20,419 INFO L137 encePairwiseOnDemand]: 57/77 looper letters, 71 selfloop transitions, 2180 changer transitions 53/2339 dead transitions. [2022-12-11 20:12:20,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 2339 transitions, 51384 flow [2022-12-11 20:12:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-11 20:12:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-11 20:12:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2636 transitions. [2022-12-11 20:12:20,423 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6113172541743971 [2022-12-11 20:12:20,423 INFO L175 Difference]: Start difference. First operand has 405 places, 1891 transitions, 37643 flow. Second operand 56 states and 2636 transitions. [2022-12-11 20:12:20,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 2339 transitions, 51384 flow [2022-12-11 20:12:21,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 2339 transitions, 50993 flow, removed 177 selfloop flow, removed 6 redundant places. [2022-12-11 20:12:21,603 INFO L231 Difference]: Finished difference. Result has 465 places, 2257 transitions, 50943 flow [2022-12-11 20:12:21,605 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=37276, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=50943, PETRI_PLACES=465, PETRI_TRANSITIONS=2257} [2022-12-11 20:12:21,605 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 397 predicate places. [2022-12-11 20:12:21,606 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 2257 transitions, 50943 flow [2022-12-11 20:12:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 46.76923076923077) internal successors, (1216), 26 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:21,606 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:21,606 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:12:21,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-11 20:12:21,811 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,SelfDestructingSolverStorable12 [2022-12-11 20:12:21,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash -389518391, now seen corresponding path program 10 times [2022-12-11 20:12:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932913002] [2022-12-11 20:12:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:21,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:21,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932913002] [2022-12-11 20:12:21,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932913002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443918345] [2022-12-11 20:12:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 20:12:21,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:21,960 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) [2022-12-11 20:12:21,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-11 20:12:22,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 20:12:22,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:12:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:22,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:22,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443918345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:22,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:22,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-12-11 20:12:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838258930] [2022-12-11 20:12:22,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:22,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-11 20:12:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-11 20:12:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-11 20:12:22,302 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:22,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 2257 transitions, 50943 flow. Second operand has 25 states, 25 states have (on average 46.76) internal successors, (1169), 25 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:22,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:22,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:22,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:29,590 INFO L130 PetriNetUnfolder]: 2602/6503 cut-off events. [2022-12-11 20:12:29,590 INFO L131 PetriNetUnfolder]: For 162305/162305 co-relation queries the response was YES. [2022-12-11 20:12:29,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68951 conditions, 6503 events. 2602/6503 cut-off events. For 162305/162305 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 59841 event pairs, 5 based on Foata normal form. 17/6520 useless extension candidates. Maximal degree in co-relation 68736. Up to 1468 conditions per place. [2022-12-11 20:12:29,678 INFO L137 encePairwiseOnDemand]: 58/77 looper letters, 856 selfloop transitions, 3124 changer transitions 27/4042 dead transitions. [2022-12-11 20:12:29,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 4042 transitions, 100456 flow [2022-12-11 20:12:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-12-11 20:12:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-12-11 20:12:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 5755 transitions. [2022-12-11 20:12:29,684 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6126250798381946 [2022-12-11 20:12:29,684 INFO L175 Difference]: Start difference. First operand has 465 places, 2257 transitions, 50943 flow. Second operand 122 states and 5755 transitions. [2022-12-11 20:12:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 4042 transitions, 100456 flow [2022-12-11 20:12:32,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 4042 transitions, 92720 flow, removed 1471 selfloop flow, removed 21 redundant places. [2022-12-11 20:12:32,379 INFO L231 Difference]: Finished difference. Result has 589 places, 3785 transitions, 90011 flow [2022-12-11 20:12:32,381 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=46996, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1678, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=90011, PETRI_PLACES=589, PETRI_TRANSITIONS=3785} [2022-12-11 20:12:32,381 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 521 predicate places. [2022-12-11 20:12:32,381 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 3785 transitions, 90011 flow [2022-12-11 20:12:32,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 46.76) internal successors, (1169), 25 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:32,382 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:32,382 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:12:32,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:32,586 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,SelfDestructingSolverStorable13 [2022-12-11 20:12:32,587 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1155391161, now seen corresponding path program 11 times [2022-12-11 20:12:32,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:32,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468661889] [2022-12-11 20:12:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:32,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468661889] [2022-12-11 20:12:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468661889] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377619236] [2022-12-11 20:12:32,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 20:12:32,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:32,674 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) [2022-12-11 20:12:32,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-11 20:12:32,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-11 20:12:32,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-11 20:12:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:32,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:32,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377619236] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:32,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:32,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-11 20:12:32,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307020988] [2022-12-11 20:12:32,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-11 20:12:32,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-11 20:12:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-12-11 20:12:32,956 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:32,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 3785 transitions, 90011 flow. Second operand has 22 states, 22 states have (on average 46.54545454545455) internal successors, (1024), 22 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:32,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:32,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:32,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:39,971 INFO L130 PetriNetUnfolder]: 2834/6898 cut-off events. [2022-12-11 20:12:39,971 INFO L131 PetriNetUnfolder]: For 158202/158202 co-relation queries the response was YES. [2022-12-11 20:12:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76530 conditions, 6898 events. 2834/6898 cut-off events. For 158202/158202 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 62896 event pairs, 77 based on Foata normal form. 8/6861 useless extension candidates. Maximal degree in co-relation 76272. Up to 3516 conditions per place. [2022-12-11 20:12:40,076 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 2836 selfloop transitions, 1436 changer transitions 15/4322 dead transitions. [2022-12-11 20:12:40,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 4322 transitions, 111389 flow [2022-12-11 20:12:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-11 20:12:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-11 20:12:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1639 transitions. [2022-12-11 20:12:40,078 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6260504201680672 [2022-12-11 20:12:40,078 INFO L175 Difference]: Start difference. First operand has 589 places, 3785 transitions, 90011 flow. Second operand 34 states and 1639 transitions. [2022-12-11 20:12:40,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 4322 transitions, 111389 flow [2022-12-11 20:12:43,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 4322 transitions, 108278 flow, removed 1460 selfloop flow, removed 16 redundant places. [2022-12-11 20:12:43,682 INFO L231 Difference]: Finished difference. Result has 614 places, 4149 transitions, 102188 flow [2022-12-11 20:12:43,685 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=87183, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=102188, PETRI_PLACES=614, PETRI_TRANSITIONS=4149} [2022-12-11 20:12:43,686 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 546 predicate places. [2022-12-11 20:12:43,686 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 4149 transitions, 102188 flow [2022-12-11 20:12:43,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.54545454545455) internal successors, (1024), 22 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:43,686 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:43,686 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:12:43,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:43,887 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,SelfDestructingSolverStorable14 [2022-12-11 20:12:43,889 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash -418362695, now seen corresponding path program 12 times [2022-12-11 20:12:43,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:43,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318319485] [2022-12-11 20:12:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:43,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318319485] [2022-12-11 20:12:43,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318319485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912818315] [2022-12-11 20:12:43,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 20:12:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:43,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:43,980 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) [2022-12-11 20:12:43,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-11 20:12:44,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-11 20:12:44,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:12:44,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:12:44,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:44,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:44,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912818315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:44,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-12-11 20:12:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056455750] [2022-12-11 20:12:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:44,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:12:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:12:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:12:44,292 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:44,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 4149 transitions, 102188 flow. Second operand has 23 states, 23 states have (on average 46.47826086956522) internal successors, (1069), 23 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:44,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:44,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:44,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:12:52,350 INFO L130 PetriNetUnfolder]: 2823/6803 cut-off events. [2022-12-11 20:12:52,351 INFO L131 PetriNetUnfolder]: For 169000/169000 co-relation queries the response was YES. [2022-12-11 20:12:52,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77926 conditions, 6803 events. 2823/6803 cut-off events. For 169000/169000 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 61137 event pairs, 54 based on Foata normal form. 8/6769 useless extension candidates. Maximal degree in co-relation 77377. Up to 2902 conditions per place. [2022-12-11 20:12:52,466 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 2589 selfloop transitions, 1627 changer transitions 4/4255 dead transitions. [2022-12-11 20:12:52,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 4255 transitions, 112815 flow [2022-12-11 20:12:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-11 20:12:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-11 20:12:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1257 transitions. [2022-12-11 20:12:52,468 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6278721278721279 [2022-12-11 20:12:52,468 INFO L175 Difference]: Start difference. First operand has 614 places, 4149 transitions, 102188 flow. Second operand 26 states and 1257 transitions. [2022-12-11 20:12:52,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 4255 transitions, 112815 flow [2022-12-11 20:12:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 4255 transitions, 111490 flow, removed 637 selfloop flow, removed 8 redundant places. [2022-12-11 20:12:56,393 INFO L231 Difference]: Finished difference. Result has 631 places, 4154 transitions, 104825 flow [2022-12-11 20:12:56,396 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=100576, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=104825, PETRI_PLACES=631, PETRI_TRANSITIONS=4154} [2022-12-11 20:12:56,396 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 563 predicate places. [2022-12-11 20:12:56,396 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 4154 transitions, 104825 flow [2022-12-11 20:12:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.47826086956522) internal successors, (1069), 23 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:56,397 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:12:56,397 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:12:56,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-11 20:12:56,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-11 20:12:56,602 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:12:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:12:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash -118349789, now seen corresponding path program 13 times [2022-12-11 20:12:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:12:56,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261273299] [2022-12-11 20:12:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:12:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:12:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:12:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261273299] [2022-12-11 20:12:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261273299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:12:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560829017] [2022-12-11 20:12:56,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 20:12:56,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:12:56,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:12:56,711 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) [2022-12-11 20:12:56,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-11 20:12:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:12:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-11 20:12:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:12:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:56,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:12:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:12:57,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560829017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:12:57,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:12:57,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-12-11 20:12:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651175256] [2022-12-11 20:12:57,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:12:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:12:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:12:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:12:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:12:57,014 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:12:57,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 4154 transitions, 104825 flow. Second operand has 23 states, 23 states have (on average 46.47826086956522) internal successors, (1069), 23 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:12:57,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:12:57,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:12:57,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:13:08,884 INFO L130 PetriNetUnfolder]: 3496/8242 cut-off events. [2022-12-11 20:13:08,885 INFO L131 PetriNetUnfolder]: For 212293/212293 co-relation queries the response was YES. [2022-12-11 20:13:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97706 conditions, 8242 events. 3496/8242 cut-off events. For 212293/212293 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 75068 event pairs, 93 based on Foata normal form. 4/8189 useless extension candidates. Maximal degree in co-relation 97218. Up to 3839 conditions per place. [2022-12-11 20:13:09,027 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 3040 selfloop transitions, 2225 changer transitions 15/5315 dead transitions. [2022-12-11 20:13:09,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 5315 transitions, 145204 flow [2022-12-11 20:13:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-11 20:13:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-11 20:13:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2243 transitions. [2022-12-11 20:13:09,029 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6197844708483007 [2022-12-11 20:13:09,029 INFO L175 Difference]: Start difference. First operand has 631 places, 4154 transitions, 104825 flow. Second operand 47 states and 2243 transitions. [2022-12-11 20:13:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 5315 transitions, 145204 flow [2022-12-11 20:13:14,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 5315 transitions, 142903 flow, removed 84 selfloop flow, removed 17 redundant places. [2022-12-11 20:13:14,553 INFO L231 Difference]: Finished difference. Result has 684 places, 4977 transitions, 133121 flow [2022-12-11 20:13:14,556 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=102861, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=133121, PETRI_PLACES=684, PETRI_TRANSITIONS=4977} [2022-12-11 20:13:14,556 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 616 predicate places. [2022-12-11 20:13:14,557 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 4977 transitions, 133121 flow [2022-12-11 20:13:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.47826086956522) internal successors, (1069), 23 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:13:14,557 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:13:14,557 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:13:14,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-11 20:13:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:13:14,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:13:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:13:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -801628323, now seen corresponding path program 14 times [2022-12-11 20:13:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:13:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100537374] [2022-12-11 20:13:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:13:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:13:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:13:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:13:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:13:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100537374] [2022-12-11 20:13:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100537374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:13:14,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660745941] [2022-12-11 20:13:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:13:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:13:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:13:14,864 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) [2022-12-11 20:13:14,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-11 20:13:14,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 20:13:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:13:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:13:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:13:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:13:15,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:13:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:13:15,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660745941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:13:15,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:13:15,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-12-11 20:13:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502422832] [2022-12-11 20:13:15,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:13:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-11 20:13:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:13:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-11 20:13:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-12-11 20:13:15,164 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:13:15,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 4977 transitions, 133121 flow. Second operand has 21 states, 21 states have (on average 46.523809523809526) internal successors, (977), 21 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:13:15,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:13:15,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:13:15,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:13:30,450 INFO L130 PetriNetUnfolder]: 3846/8947 cut-off events. [2022-12-11 20:13:30,450 INFO L131 PetriNetUnfolder]: For 274648/274648 co-relation queries the response was YES. [2022-12-11 20:13:30,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112803 conditions, 8947 events. 3846/8947 cut-off events. For 274648/274648 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 80898 event pairs, 16 based on Foata normal form. 24/8969 useless extension candidates. Maximal degree in co-relation 112321. Up to 3616 conditions per place. [2022-12-11 20:13:30,741 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 3328 selfloop transitions, 2322 changer transitions 5/5690 dead transitions. [2022-12-11 20:13:30,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 5690 transitions, 164075 flow [2022-12-11 20:13:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-11 20:13:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-11 20:13:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2253 transitions. [2022-12-11 20:13:30,743 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6225476651008566 [2022-12-11 20:13:30,743 INFO L175 Difference]: Start difference. First operand has 684 places, 4977 transitions, 133121 flow. Second operand 47 states and 2253 transitions. [2022-12-11 20:13:30,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 5690 transitions, 164075 flow [2022-12-11 20:13:38,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 5690 transitions, 160723 flow, removed 1580 selfloop flow, removed 12 redundant places. [2022-12-11 20:13:38,218 INFO L231 Difference]: Finished difference. Result has 738 places, 5433 transitions, 152366 flow [2022-12-11 20:13:38,221 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130778, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1866, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=152366, PETRI_PLACES=738, PETRI_TRANSITIONS=5433} [2022-12-11 20:13:38,222 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 670 predicate places. [2022-12-11 20:13:38,222 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 5433 transitions, 152366 flow [2022-12-11 20:13:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.523809523809526) internal successors, (977), 21 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:13:38,222 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:13:38,222 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:13:38,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-11 20:13:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-11 20:13:38,424 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:13:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:13:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1302922871, now seen corresponding path program 15 times [2022-12-11 20:13:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:13:38,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580035187] [2022-12-11 20:13:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:13:38,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:13:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:13:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:13:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:13:38,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580035187] [2022-12-11 20:13:38,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580035187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:13:38,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268357807] [2022-12-11 20:13:38,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 20:13:38,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:13:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:13:38,545 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:13:38,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-11 20:13:38,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-11 20:13:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:13:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:13:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:13:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:13:38,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:13:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:13:38,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268357807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:13:38,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:13:38,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-12-11 20:13:38,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189017227] [2022-12-11 20:13:38,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:13:38,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-11 20:13:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:13:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-11 20:13:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-12-11 20:13:38,858 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:13:38,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 5433 transitions, 152366 flow. Second operand has 25 states, 25 states have (on average 46.76) internal successors, (1169), 25 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:13:38,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:13:38,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:13:38,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:14:02,350 INFO L130 PetriNetUnfolder]: 5429/13050 cut-off events. [2022-12-11 20:14:02,351 INFO L131 PetriNetUnfolder]: For 437965/437965 co-relation queries the response was YES. [2022-12-11 20:14:02,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167187 conditions, 13050 events. 5429/13050 cut-off events. For 437965/437965 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 129172 event pairs, 92 based on Foata normal form. 47/13020 useless extension candidates. Maximal degree in co-relation 166629. Up to 3233 conditions per place. [2022-12-11 20:14:02,632 INFO L137 encePairwiseOnDemand]: 58/77 looper letters, 2009 selfloop transitions, 5968 changer transitions 44/8056 dead transitions. [2022-12-11 20:14:02,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 8056 transitions, 241184 flow [2022-12-11 20:14:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-11 20:14:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-12-11 20:14:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 4386 transitions. [2022-12-11 20:14:02,636 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6124842899036448 [2022-12-11 20:14:02,636 INFO L175 Difference]: Start difference. First operand has 738 places, 5433 transitions, 152366 flow. Second operand 93 states and 4386 transitions. [2022-12-11 20:14:02,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 8056 transitions, 241184 flow [2022-12-11 20:14:14,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 8056 transitions, 240553 flow, removed 216 selfloop flow, removed 15 redundant places. [2022-12-11 20:14:14,457 INFO L231 Difference]: Finished difference. Result has 841 places, 7659 transitions, 236993 flow [2022-12-11 20:14:14,461 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=151905, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=236993, PETRI_PLACES=841, PETRI_TRANSITIONS=7659} [2022-12-11 20:14:14,461 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 773 predicate places. [2022-12-11 20:14:14,461 INFO L495 AbstractCegarLoop]: Abstraction has has 841 places, 7659 transitions, 236993 flow [2022-12-11 20:14:14,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 46.76) internal successors, (1169), 25 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:14:14,462 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:14:14,462 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:14:14,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-11 20:14:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:14:14,666 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:14:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:14:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1955324033, now seen corresponding path program 16 times [2022-12-11 20:14:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:14:14,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774437014] [2022-12-11 20:14:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:14:14,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:14:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:14:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:14:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:14:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774437014] [2022-12-11 20:14:14,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774437014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:14:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527647473] [2022-12-11 20:14:14,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 20:14:14,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:14:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:14:14,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:14:14,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-11 20:14:14,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 20:14:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:14:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:14:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:14:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:14:14,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:14:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:14:15,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527647473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:14:15,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:14:15,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-12-11 20:14:15,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028935695] [2022-12-11 20:14:15,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:14:15,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:14:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:14:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:14:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:14:15,064 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:14:15,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 7659 transitions, 236993 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:14:15,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:14:15,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:14:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:14:52,163 INFO L130 PetriNetUnfolder]: 5610/13459 cut-off events. [2022-12-11 20:14:52,164 INFO L131 PetriNetUnfolder]: For 533846/533846 co-relation queries the response was YES. [2022-12-11 20:14:52,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186842 conditions, 13459 events. 5610/13459 cut-off events. For 533846/533846 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 133562 event pairs, 1 based on Foata normal form. 12/13468 useless extension candidates. Maximal degree in co-relation 186407. Up to 5416 conditions per place. [2022-12-11 20:14:52,585 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 5093 selfloop transitions, 2960 changer transitions 2/8090 dead transitions. [2022-12-11 20:14:52,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 8090 transitions, 265537 flow [2022-12-11 20:14:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-11 20:14:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-11 20:14:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1963 transitions. [2022-12-11 20:14:52,587 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6217928413050364 [2022-12-11 20:14:52,587 INFO L175 Difference]: Start difference. First operand has 841 places, 7659 transitions, 236993 flow. Second operand 41 states and 1963 transitions. [2022-12-11 20:14:52,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 8090 transitions, 265537 flow [2022-12-11 20:15:09,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 861 places, 8090 transitions, 261572 flow, removed 1725 selfloop flow, removed 17 redundant places. [2022-12-11 20:15:09,511 INFO L231 Difference]: Finished difference. Result has 882 places, 7992 transitions, 254896 flow [2022-12-11 20:15:09,516 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=233244, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4875, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=254896, PETRI_PLACES=882, PETRI_TRANSITIONS=7992} [2022-12-11 20:15:09,517 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 814 predicate places. [2022-12-11 20:15:09,517 INFO L495 AbstractCegarLoop]: Abstraction has has 882 places, 7992 transitions, 254896 flow [2022-12-11 20:15:09,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:15:09,517 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:15:09,517 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:15:09,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-11 20:15:09,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:15:09,718 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:15:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:15:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2057767399, now seen corresponding path program 17 times [2022-12-11 20:15:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:15:09,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835437276] [2022-12-11 20:15:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:15:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:15:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:15:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:15:09,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:15:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835437276] [2022-12-11 20:15:09,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835437276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:15:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101872875] [2022-12-11 20:15:09,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 20:15:09,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:15:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:15:09,817 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:15:09,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-11 20:15:09,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-11 20:15:09,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:15:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-11 20:15:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:15:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:15:10,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:15:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:15:10,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101872875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:15:10,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:15:10,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-12-11 20:15:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330550869] [2022-12-11 20:15:10,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:15:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-11 20:15:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:15:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-11 20:15:10,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-12-11 20:15:10,171 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:15:10,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 7992 transitions, 254896 flow. Second operand has 24 states, 24 states have (on average 46.375) internal successors, (1113), 24 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:15:10,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:15:10,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:15:10,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:15:57,460 INFO L130 PetriNetUnfolder]: 6076/14593 cut-off events. [2022-12-11 20:15:57,461 INFO L131 PetriNetUnfolder]: For 631427/631427 co-relation queries the response was YES. [2022-12-11 20:15:57,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208201 conditions, 14593 events. 6076/14593 cut-off events. For 631427/631427 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 147144 event pairs, 1 based on Foata normal form. 24/14617 useless extension candidates. Maximal degree in co-relation 207732. Up to 5342 conditions per place. [2022-12-11 20:15:57,811 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 4758 selfloop transitions, 4090 changer transitions 4/8887 dead transitions. [2022-12-11 20:15:57,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 921 places, 8887 transitions, 301250 flow [2022-12-11 20:15:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-11 20:15:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-11 20:15:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1915 transitions. [2022-12-11 20:15:57,813 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6217532467532467 [2022-12-11 20:15:57,813 INFO L175 Difference]: Start difference. First operand has 882 places, 7992 transitions, 254896 flow. Second operand 40 states and 1915 transitions. [2022-12-11 20:15:57,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 921 places, 8887 transitions, 301250 flow [2022-12-11 20:16:18,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 8887 transitions, 299675 flow, removed 738 selfloop flow, removed 10 redundant places. [2022-12-11 20:16:18,410 INFO L231 Difference]: Finished difference. Result has 937 places, 8795 transitions, 296477 flow [2022-12-11 20:16:18,416 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=253327, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=296477, PETRI_PLACES=937, PETRI_TRANSITIONS=8795} [2022-12-11 20:16:18,416 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 869 predicate places. [2022-12-11 20:16:18,416 INFO L495 AbstractCegarLoop]: Abstraction has has 937 places, 8795 transitions, 296477 flow [2022-12-11 20:16:18,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 46.375) internal successors, (1113), 24 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:16:18,417 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:16:18,417 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:16:18,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-11 20:16:18,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:16:18,620 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:16:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:16:18,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1162714723, now seen corresponding path program 18 times [2022-12-11 20:16:18,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:16:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398374885] [2022-12-11 20:16:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:16:18,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:16:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:16:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:16:18,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:16:18,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398374885] [2022-12-11 20:16:18,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398374885] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:16:18,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49126813] [2022-12-11 20:16:18,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 20:16:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:16:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:16:18,716 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:16:18,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-11 20:16:18,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-11 20:16:18,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:16:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:16:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:16:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:16:18,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:16:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:16:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49126813] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:16:19,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:16:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-12-11 20:16:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902716581] [2022-12-11 20:16:19,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:16:19,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:16:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:16:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:16:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:16:19,006 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:16:19,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 8795 transitions, 296477 flow. Second operand has 23 states, 23 states have (on average 46.43478260869565) internal successors, (1068), 23 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:16:19,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:16:19,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:16:19,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:17:14,133 INFO L130 PetriNetUnfolder]: 6161/14596 cut-off events. [2022-12-11 20:17:14,133 INFO L131 PetriNetUnfolder]: For 730803/730803 co-relation queries the response was YES. [2022-12-11 20:17:14,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221410 conditions, 14596 events. 6161/14596 cut-off events. For 730803/730803 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 145847 event pairs, 120 based on Foata normal form. 8/14519 useless extension candidates. Maximal degree in co-relation 221081. Up to 8259 conditions per place. [2022-12-11 20:17:14,501 INFO L137 encePairwiseOnDemand]: 62/77 looper letters, 6447 selfloop transitions, 2667 changer transitions 5/9154 dead transitions. [2022-12-11 20:17:14,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 9154 transitions, 326155 flow [2022-12-11 20:17:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-11 20:17:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-11 20:17:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1393 transitions. [2022-12-11 20:17:14,502 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6238244514106583 [2022-12-11 20:17:14,503 INFO L175 Difference]: Start difference. First operand has 937 places, 8795 transitions, 296477 flow. Second operand 29 states and 1393 transitions. [2022-12-11 20:17:14,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 9154 transitions, 326155 flow [2022-12-11 20:17:37,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 9154 transitions, 323834 flow, removed 1127 selfloop flow, removed 12 redundant places. [2022-12-11 20:17:37,958 INFO L231 Difference]: Finished difference. Result has 955 places, 8865 transitions, 307052 flow [2022-12-11 20:17:37,963 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=293796, PETRI_DIFFERENCE_MINUEND_PLACES=922, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=307052, PETRI_PLACES=955, PETRI_TRANSITIONS=8865} [2022-12-11 20:17:37,964 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 887 predicate places. [2022-12-11 20:17:37,964 INFO L495 AbstractCegarLoop]: Abstraction has has 955 places, 8865 transitions, 307052 flow [2022-12-11 20:17:37,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.43478260869565) internal successors, (1068), 23 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:17:37,964 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:17:37,964 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:17:37,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-11 20:17:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:17:38,171 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:17:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:17:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash 969277859, now seen corresponding path program 19 times [2022-12-11 20:17:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:17:38,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141833014] [2022-12-11 20:17:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:17:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:17:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:17:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:17:38,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:17:38,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141833014] [2022-12-11 20:17:38,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141833014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:17:38,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407124572] [2022-12-11 20:17:38,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 20:17:38,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:17:38,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:17:38,271 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:17:38,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-11 20:17:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:17:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:17:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:17:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:17:38,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:17:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:17:38,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407124572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:17:38,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:17:38,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-12-11 20:17:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412577815] [2022-12-11 20:17:38,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:17:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-11 20:17:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:17:38,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-11 20:17:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-12-11 20:17:38,580 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:17:38,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 955 places, 8865 transitions, 307052 flow. Second operand has 21 states, 21 states have (on average 46.476190476190474) internal successors, (976), 21 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:17:38,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:17:38,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:17:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:18:39,887 INFO L130 PetriNetUnfolder]: 6791/15973 cut-off events. [2022-12-11 20:18:39,887 INFO L131 PetriNetUnfolder]: For 894263/894263 co-relation queries the response was YES. [2022-12-11 20:18:40,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249530 conditions, 15973 events. 6791/15973 cut-off events. For 894263/894263 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 161426 event pairs, 115 based on Foata normal form. 43/15927 useless extension candidates. Maximal degree in co-relation 249027. Up to 7520 conditions per place. [2022-12-11 20:18:40,348 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 6723 selfloop transitions, 3159 changer transitions 1/9918 dead transitions. [2022-12-11 20:18:40,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 999 places, 9918 transitions, 366321 flow [2022-12-11 20:18:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-11 20:18:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-11 20:18:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2169 transitions. [2022-12-11 20:18:40,350 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.625974025974026 [2022-12-11 20:18:40,351 INFO L175 Difference]: Start difference. First operand has 955 places, 8865 transitions, 307052 flow. Second operand 45 states and 2169 transitions. [2022-12-11 20:18:40,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 999 places, 9918 transitions, 366321 flow [2022-12-11 20:19:07,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 979 places, 9918 transitions, 365119 flow, removed 181 selfloop flow, removed 20 redundant places. [2022-12-11 20:19:07,870 INFO L231 Difference]: Finished difference. Result has 1004 places, 9595 transitions, 344790 flow [2022-12-11 20:19:07,880 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=305982, PETRI_DIFFERENCE_MINUEND_PLACES=935, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6072, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=344790, PETRI_PLACES=1004, PETRI_TRANSITIONS=9595} [2022-12-11 20:19:07,881 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 936 predicate places. [2022-12-11 20:19:07,881 INFO L495 AbstractCegarLoop]: Abstraction has has 1004 places, 9595 transitions, 344790 flow [2022-12-11 20:19:07,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.476190476190474) internal successors, (976), 21 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:19:07,881 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:19:07,881 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:19:07,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-11 20:19:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-11 20:19:08,086 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:19:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:19:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash -895971295, now seen corresponding path program 20 times [2022-12-11 20:19:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:19:08,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175411297] [2022-12-11 20:19:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:19:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:19:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:19:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:19:08,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:19:08,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175411297] [2022-12-11 20:19:08,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175411297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:19:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822514070] [2022-12-11 20:19:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:19:08,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:19:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:19:08,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:19:08,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-11 20:19:08,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 20:19:08,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:19:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:19:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:19:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:19:08,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:19:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:19:08,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822514070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:19:08,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:19:08,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-12-11 20:19:08,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123920232] [2022-12-11 20:19:08,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:19:08,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:19:08,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:19:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:19:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:19:08,531 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:19:08,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1004 places, 9595 transitions, 344790 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:19:08,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:19:08,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:19:08,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:20:28,578 INFO L130 PetriNetUnfolder]: 7612/18203 cut-off events. [2022-12-11 20:20:28,578 INFO L131 PetriNetUnfolder]: For 1130002/1130002 co-relation queries the response was YES. [2022-12-11 20:20:29,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293293 conditions, 18203 events. 7612/18203 cut-off events. For 1130002/1130002 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 189079 event pairs, 4 based on Foata normal form. 46/18248 useless extension candidates. Maximal degree in co-relation 292927. Up to 5629 conditions per place. [2022-12-11 20:20:29,194 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 5588 selfloop transitions, 5494 changer transitions 5/11122 dead transitions. [2022-12-11 20:20:29,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1033 places, 11122 transitions, 425898 flow [2022-12-11 20:20:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-11 20:20:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-11 20:20:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1653 transitions. [2022-12-11 20:20:29,196 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.631398013750955 [2022-12-11 20:20:29,196 INFO L175 Difference]: Start difference. First operand has 1004 places, 9595 transitions, 344790 flow. Second operand 34 states and 1653 transitions. [2022-12-11 20:20:29,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1033 places, 11122 transitions, 425898 flow [2022-12-11 20:21:06,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1021 places, 11122 transitions, 423625 flow, removed 1068 selfloop flow, removed 12 redundant places. [2022-12-11 20:21:06,574 INFO L231 Difference]: Finished difference. Result has 1040 places, 10699 transitions, 410709 flow [2022-12-11 20:21:06,578 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=341459, PETRI_DIFFERENCE_MINUEND_PLACES=988, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=410709, PETRI_PLACES=1040, PETRI_TRANSITIONS=10699} [2022-12-11 20:21:06,578 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 972 predicate places. [2022-12-11 20:21:06,578 INFO L495 AbstractCegarLoop]: Abstraction has has 1040 places, 10699 transitions, 410709 flow [2022-12-11 20:21:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:21:06,579 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:21:06,579 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:21:06,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-11 20:21:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-11 20:21:06,783 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:21:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:21:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1102381661, now seen corresponding path program 21 times [2022-12-11 20:21:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:21:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027518380] [2022-12-11 20:21:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:21:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:21:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:21:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 20:21:07,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:21:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027518380] [2022-12-11 20:21:07,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027518380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:21:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875212067] [2022-12-11 20:21:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 20:21:07,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:21:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:21:07,057 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:21:07,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-11 20:21:07,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-11 20:21:07,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:21:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:21:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:21:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:21:07,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:21:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:21:07,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875212067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:21:07,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:21:07,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-12-11 20:21:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357406049] [2022-12-11 20:21:07,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:21:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:21:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:21:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:21:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:21:07,470 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:21:07,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1040 places, 10699 transitions, 410709 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:21:07,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:21:07,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:21:07,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:22:47,895 INFO L130 PetriNetUnfolder]: 8246/19745 cut-off events. [2022-12-11 20:22:47,895 INFO L131 PetriNetUnfolder]: For 1438380/1438380 co-relation queries the response was YES. [2022-12-11 20:22:48,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340115 conditions, 19745 events. 8246/19745 cut-off events. For 1438380/1438380 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 206892 event pairs, 110 based on Foata normal form. 90/19750 useless extension candidates. Maximal degree in co-relation 339468. Up to 8689 conditions per place. [2022-12-11 20:22:48,488 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 7635 selfloop transitions, 4487 changer transitions 13/12170 dead transitions. [2022-12-11 20:22:48,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1101 places, 12170 transitions, 499528 flow [2022-12-11 20:22:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-11 20:22:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-11 20:22:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 2975 transitions. [2022-12-11 20:22:48,494 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6231671554252199 [2022-12-11 20:22:48,494 INFO L175 Difference]: Start difference. First operand has 1040 places, 10699 transitions, 410709 flow. Second operand 62 states and 2975 transitions. [2022-12-11 20:22:48,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1101 places, 12170 transitions, 499528 flow [2022-12-11 20:23:35,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1093 places, 12170 transitions, 496433 flow, removed 1520 selfloop flow, removed 8 redundant places. [2022-12-11 20:23:35,400 INFO L231 Difference]: Finished difference. Result has 1131 places, 11866 transitions, 479207 flow [2022-12-11 20:23:35,406 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=407537, PETRI_DIFFERENCE_MINUEND_PLACES=1032, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=479207, PETRI_PLACES=1131, PETRI_TRANSITIONS=11866} [2022-12-11 20:23:35,406 INFO L295 CegarLoopForPetriNet]: 68 programPoint places, 1063 predicate places. [2022-12-11 20:23:35,406 INFO L495 AbstractCegarLoop]: Abstraction has has 1131 places, 11866 transitions, 479207 flow [2022-12-11 20:23:35,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:23:35,407 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:23:35,407 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:23:35,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-11 20:23:35,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:23:35,610 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 20:23:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:23:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1173977299, now seen corresponding path program 22 times [2022-12-11 20:23:35,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:23:35,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969998959] [2022-12-11 20:23:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:23:35,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:23:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:23:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:23:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:23:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969998959] [2022-12-11 20:23:35,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969998959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:23:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764240002] [2022-12-11 20:23:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 20:23:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:23:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:23:35,696 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 20:23:35,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-11 20:23:35,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 20:23:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:23:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 20:23:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:23:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:23:35,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:23:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:23:36,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764240002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:23:36,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:23:36,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-12-11 20:23:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105484625] [2022-12-11 20:23:36,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:23:36,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 20:23:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:23:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 20:23:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-12-11 20:23:36,031 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-11 20:23:36,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1131 places, 11866 transitions, 479207 flow. Second operand has 23 states, 23 states have (on average 46.43478260869565) internal successors, (1068), 23 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:23:36,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:23:36,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-11 20:23:36,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-11 20:24:55,347 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 20:24:55,347 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 20:24:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-11 20:24:55,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-11 20:24:55,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-11 20:24:55,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:24:55,781 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 44/77 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 282368 conditions, 14732 events (6401/14731 cut-off events. For 1290798/1290798 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 157865 event pairs, 64 based on Foata normal form. 14/15481 useless extension candidates. Maximal degree in co-relation 281874. Up to 5639 conditions per place.). [2022-12-11 20:24:55,783 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-11 20:24:55,783 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-11 20:24:55,783 INFO L445 BasicCegarLoop]: Path program histogram: [22, 2, 1, 1] [2022-12-11 20:24:55,785 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-11 20:24:55,785 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-11 20:24:55,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.12 08:24:55 BasicIcfg [2022-12-11 20:24:55,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-11 20:24:55,788 INFO L158 Benchmark]: Toolchain (without parser) took 780395.01ms. Allocated memory was 194.0MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 170.6MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2022-12-11 20:24:55,788 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 127.9MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-11 20:24:55,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.28ms. Allocated memory is still 194.0MB. Free memory was 170.6MB in the beginning and 160.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-12-11 20:24:55,788 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.70ms. Allocated memory is still 194.0MB. Free memory was 159.6MB in the beginning and 158.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-11 20:24:55,788 INFO L158 Benchmark]: Boogie Preprocessor took 26.97ms. Allocated memory is still 194.0MB. Free memory was 158.0MB in the beginning and 157.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-11 20:24:55,789 INFO L158 Benchmark]: RCFGBuilder took 307.11ms. Allocated memory is still 194.0MB. Free memory was 157.0MB in the beginning and 145.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-11 20:24:55,789 INFO L158 Benchmark]: TraceAbstraction took 779854.47ms. Allocated memory was 194.0MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 143.9MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2022-12-11 20:24:55,789 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 127.9MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 173.28ms. Allocated memory is still 194.0MB. Free memory was 170.6MB in the beginning and 160.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.70ms. Allocated memory is still 194.0MB. Free memory was 159.6MB in the beginning and 158.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.97ms. Allocated memory is still 194.0MB. Free memory was 158.0MB in the beginning and 157.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 307.11ms. Allocated memory is still 194.0MB. Free memory was 157.0MB in the beginning and 145.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 779854.47ms. Allocated memory was 194.0MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 143.9MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 44/77 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 282368 conditions, 14732 events (6401/14731 cut-off events. For 1290798/1290798 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 157865 event pairs, 64 based on Foata normal form. 14/15481 useless extension candidates. Maximal degree in co-relation 281874. Up to 5639 conditions per place.). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 44/77 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 282368 conditions, 14732 events (6401/14731 cut-off events. For 1290798/1290798 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 157865 event pairs, 64 based on Foata normal form. 14/15481 useless extension candidates. Maximal degree in co-relation 281874. Up to 5639 conditions per place.). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 44/77 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 282368 conditions, 14732 events (6401/14731 cut-off events. For 1290798/1290798 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 157865 event pairs, 64 based on Foata normal form. 14/15481 useless extension candidates. Maximal degree in co-relation 281874. Up to 5639 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 779.8s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 763.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4526 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4526 mSDsluCounter, 4919 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4264 mSDsCounter, 809 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15186 IncrementalHoareTripleChecker+Invalid, 15995 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 809 mSolverCounterUnsat, 655 mSDtfsCounter, 15186 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3910 GetRequests, 2590 SyntacticMatches, 32 SemanticMatches, 1288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24472 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=479207occurred in iteration=25, InterpolantAutomatonStates: 984, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 3077 NumberOfCodeBlocks, 3067 NumberOfCodeBlocksAsserted, 76 NumberOfCheckSat, 4340 ConstructedInterpolants, 0 QuantifiedInterpolants, 16590 SizeOfPredicates, 203 NumberOfNonLiveVariables, 3389 ConjunctsInSsa, 311 ConjunctsInUnsatCore, 70 InterpolantComputations, 6 PerfectInterpolantSequences, 186/343 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown