/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:15:22,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:15:22,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:15:22,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:15:22,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:15:22,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:15:22,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:15:22,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:15:22,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:15:22,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:15:22,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:15:22,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:15:22,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:15:22,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:15:22,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:15:22,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:15:22,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:15:22,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:15:22,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:15:22,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:15:22,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:15:22,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:15:22,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:15:22,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:15:22,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:15:22,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:15:22,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:15:22,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:15:22,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:15:22,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:15:22,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:15:22,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:15:22,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:15:22,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:15:22,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:15:22,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:15:22,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:15:22,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:15:22,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:15:22,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:15:22,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:15:22,657 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-SemanticLbe.epf [2022-12-05 21:15:22,700 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:15:22,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:15:22,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:15:22,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:15:22,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:15:22,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:15:22,702 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:15:22,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:15:22,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:15:22,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:15:22,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:15:22,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:15:22,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:15:22,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:15:22,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:15:22,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:15:22,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:15:22,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:15:22,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:15:22,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:15:22,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:15:22,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:15:22,705 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:15:22,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:15:22,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:15:22,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:15:22,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:15:22,967 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:15:22,968 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:15:22,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-12-05 21:15:23,972 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:15:24,080 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:15:24,081 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-12-05 21:15:24,084 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf94f1e4/e41a125b65fd46a8b20d44df7668dd5c/FLAG2653a882a [2022-12-05 21:15:24,096 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf94f1e4/e41a125b65fd46a8b20d44df7668dd5c [2022-12-05 21:15:24,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:15:24,099 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:15:24,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:15:24,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:15:24,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:15:24,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a8cc7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24, skipping insertion in model container [2022-12-05 21:15:24,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:15:24,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:15:24,234 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/mult-comm.wvr.c[1910,1923] [2022-12-05 21:15:24,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:15:24,242 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:15:24,263 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/mult-comm.wvr.c[1910,1923] [2022-12-05 21:15:24,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:15:24,277 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:15:24,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24 WrapperNode [2022-12-05 21:15:24,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:15:24,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:15:24,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:15:24,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:15:24,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,304 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-12-05 21:15:24,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:15:24,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:15:24,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:15:24,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:15:24,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,317 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:15:24,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:15:24,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:15:24,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:15:24,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (1/1) ... [2022-12-05 21:15:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:15:24,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:24,367 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) [2022-12-05 21:15:24,411 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 [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:15:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:15:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:15:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:15:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:15:24,418 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:15:24,497 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:15:24,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:15:24,669 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:15:24,674 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:15:24,674 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 21:15:24,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:15:24 BoogieIcfgContainer [2022-12-05 21:15:24,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:15:24,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:15:24,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:15:24,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:15:24,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:15:24" (1/3) ... [2022-12-05 21:15:24,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1b6d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:15:24, skipping insertion in model container [2022-12-05 21:15:24,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:24" (2/3) ... [2022-12-05 21:15:24,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1b6d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:15:24, skipping insertion in model container [2022-12-05 21:15:24,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:15:24" (3/3) ... [2022-12-05 21:15:24,681 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-12-05 21:15:24,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:15:24,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:15:24,700 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:15:24,737 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 21:15:24,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 75 transitions, 166 flow [2022-12-05 21:15:24,814 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2022-12-05 21:15:24,814 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:15:24,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-05 21:15:24,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 75 transitions, 166 flow [2022-12-05 21:15:24,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 142 flow [2022-12-05 21:15:24,824 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:15:24,846 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 142 flow [2022-12-05 21:15:24,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2022-12-05 21:15:24,880 INFO L130 PetriNetUnfolder]: 5/65 cut-off events. [2022-12-05 21:15:24,880 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:15:24,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 5/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-05 21:15:24,882 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 142 flow [2022-12-05 21:15:24,882 INFO L188 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-05 21:15:26,474 INFO L203 LiptonReduction]: Total number of compositions: 50 [2022-12-05 21:15:26,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:15:26,518 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;@4f4a21d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:15:26,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 21:15:26,524 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-05 21:15:26,524 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:15:26,524 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:26,524 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:26,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash 948435928, now seen corresponding path program 1 times [2022-12-05 21:15:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:26,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347295352] [2022-12-05 21:15:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:26,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347295352] [2022-12-05 21:15:26,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347295352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:26,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:26,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 21:15:26,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914820802] [2022-12-05 21:15:26,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:26,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:15:26,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:15:26,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:15:26,895 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:15:26,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:26,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:26,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:15:26,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:26,948 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2022-12-05 21:15:26,948 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-05 21:15:26,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 323 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2022-12-05 21:15:26,951 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2022-12-05 21:15:26,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2022-12-05 21:15:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:15:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:15:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-05 21:15:26,958 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2022-12-05 21:15:26,959 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 30 transitions. [2022-12-05 21:15:26,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2022-12-05 21:15:26,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:15:26,963 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2022-12-05 21:15:26,964 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2022-12-05 21:15:26,967 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-12-05 21:15:26,967 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2022-12-05 21:15:26,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:26,967 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:26,967 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:26,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:15:26,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash -285936356, now seen corresponding path program 1 times [2022-12-05 21:15:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:26,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975075106] [2022-12-05 21:15:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:27,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:27,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975075106] [2022-12-05 21:15:27,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975075106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:27,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851850274] [2022-12-05 21:15:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:27,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:27,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:27,260 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) [2022-12-05 21:15:27,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:15:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-05 21:15:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851850274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:27,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:27,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-12-05 21:15:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439748340] [2022-12-05 21:15:27,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:27,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:15:27,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:15:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:15:27,572 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 21:15:27,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:27,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:27,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 21:15:27,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:27,803 INFO L130 PetriNetUnfolder]: 75/137 cut-off events. [2022-12-05 21:15:27,803 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-05 21:15:27,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 137 events. 75/137 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 430 event pairs, 1 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 84. Up to 79 conditions per place. [2022-12-05 21:15:27,805 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 21 selfloop transitions, 5 changer transitions 15/42 dead transitions. [2022-12-05 21:15:27,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 200 flow [2022-12-05 21:15:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:15:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:15:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 48 transitions. [2022-12-05 21:15:27,807 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-05 21:15:27,807 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 48 transitions. [2022-12-05 21:15:27,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 200 flow [2022-12-05 21:15:27,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:27,808 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2022-12-05 21:15:27,808 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2022-12-05 21:15:27,809 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2022-12-05 21:15:27,809 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2022-12-05 21:15:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:27,810 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:27,810 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:27,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 21:15:28,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:28,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1624430121, now seen corresponding path program 1 times [2022-12-05 21:15:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832423890] [2022-12-05 21:15:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:28,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832423890] [2022-12-05 21:15:28,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832423890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221385028] [2022-12-05 21:15:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:28,170 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) [2022-12-05 21:15:28,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:15:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:28,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:28,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221385028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:28,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:28,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-12-05 21:15:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221589856] [2022-12-05 21:15:28,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:28,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:15:28,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:15:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:15:28,471 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:15:28,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:28,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:28,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:15:28,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:28,626 INFO L130 PetriNetUnfolder]: 60/114 cut-off events. [2022-12-05 21:15:28,626 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-05 21:15:28,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 114 events. 60/114 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 268 event pairs, 11 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 323. Up to 73 conditions per place. [2022-12-05 21:15:28,627 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 20 selfloop transitions, 6 changer transitions 12/38 dead transitions. [2022-12-05 21:15:28,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 222 flow [2022-12-05 21:15:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:15:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:15:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 38 transitions. [2022-12-05 21:15:28,629 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2022-12-05 21:15:28,629 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 7 states and 38 transitions. [2022-12-05 21:15:28,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 222 flow [2022-12-05 21:15:28,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 196 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-05 21:15:28,630 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 96 flow [2022-12-05 21:15:28,630 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2022-12-05 21:15:28,631 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2022-12-05 21:15:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 96 flow [2022-12-05 21:15:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:28,631 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:28,631 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:28,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:28,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-05 21:15:28,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash 703303361, now seen corresponding path program 2 times [2022-12-05 21:15:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841139328] [2022-12-05 21:15:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:28,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:28,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841139328] [2022-12-05 21:15:28,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841139328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:28,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340093998] [2022-12-05 21:15:28,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:15:28,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:28,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:28,996 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) [2022-12-05 21:15:28,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:15:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:15:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:15:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:29,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340093998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:29,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:29,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-12-05 21:15:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268259857] [2022-12-05 21:15:29,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:29,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:15:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:15:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:15:29,188 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 21:15:29,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 96 flow. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:29,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:29,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 21:15:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:29,342 INFO L130 PetriNetUnfolder]: 105/198 cut-off events. [2022-12-05 21:15:29,342 INFO L131 PetriNetUnfolder]: For 67/71 co-relation queries the response was YES. [2022-12-05 21:15:29,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 198 events. 105/198 cut-off events. For 67/71 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 629 event pairs, 9 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 556. Up to 88 conditions per place. [2022-12-05 21:15:29,344 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 36 selfloop transitions, 18 changer transitions 12/68 dead transitions. [2022-12-05 21:15:29,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 68 transitions, 374 flow [2022-12-05 21:15:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:15:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:15:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2022-12-05 21:15:29,346 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2022-12-05 21:15:29,346 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 96 flow. Second operand 10 states and 77 transitions. [2022-12-05 21:15:29,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 68 transitions, 374 flow [2022-12-05 21:15:29,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 68 transitions, 359 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-05 21:15:29,348 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 196 flow [2022-12-05 21:15:29,348 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-12-05 21:15:29,349 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2022-12-05 21:15:29,349 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 196 flow [2022-12-05 21:15:29,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:29,349 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:29,349 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:29,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:29,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:29,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash 282202291, now seen corresponding path program 3 times [2022-12-05 21:15:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:29,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723101197] [2022-12-05 21:15:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:29,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:29,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723101197] [2022-12-05 21:15:29,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723101197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934294739] [2022-12-05 21:15:29,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:15:29,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:29,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:29,680 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) [2022-12-05 21:15:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:15:29,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:15:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:15:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:29,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:29,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934294739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:29,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:29,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-05 21:15:29,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138856969] [2022-12-05 21:15:29,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:29,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:15:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:15:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:15:29,887 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 21:15:29,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 196 flow. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:29,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:29,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 21:15:29,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:30,047 INFO L130 PetriNetUnfolder]: 125/245 cut-off events. [2022-12-05 21:15:30,047 INFO L131 PetriNetUnfolder]: For 329/333 co-relation queries the response was YES. [2022-12-05 21:15:30,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 245 events. 125/245 cut-off events. For 329/333 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 870 event pairs, 20 based on Foata normal form. 7/249 useless extension candidates. Maximal degree in co-relation 802. Up to 174 conditions per place. [2022-12-05 21:15:30,049 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 41 selfloop transitions, 15 changer transitions 12/70 dead transitions. [2022-12-05 21:15:30,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 468 flow [2022-12-05 21:15:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2022-12-05 21:15:30,050 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2022-12-05 21:15:30,050 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 196 flow. Second operand 9 states and 68 transitions. [2022-12-05 21:15:30,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 468 flow [2022-12-05 21:15:30,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 408 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-12-05 21:15:30,053 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 243 flow [2022-12-05 21:15:30,053 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=243, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2022-12-05 21:15:30,054 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2022-12-05 21:15:30,054 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 243 flow [2022-12-05 21:15:30,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:30,054 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:30,054 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:30,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:30,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 709855618, now seen corresponding path program 2 times [2022-12-05 21:15:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540236494] [2022-12-05 21:15:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:30,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540236494] [2022-12-05 21:15:30,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540236494] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153120867] [2022-12-05 21:15:30,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:15:30,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:30,417 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) [2022-12-05 21:15:30,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:15:30,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:15:30,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:30,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:30,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153120867] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:30,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2022-12-05 21:15:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004932100] [2022-12-05 21:15:30,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:15:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:15:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:15:30,691 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:15:30,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 243 flow. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:30,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:30,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:15:30,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:30,896 INFO L130 PetriNetUnfolder]: 177/347 cut-off events. [2022-12-05 21:15:30,896 INFO L131 PetriNetUnfolder]: For 662/662 co-relation queries the response was YES. [2022-12-05 21:15:30,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 347 events. 177/347 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1394 event pairs, 30 based on Foata normal form. 3/348 useless extension candidates. Maximal degree in co-relation 1152. Up to 255 conditions per place. [2022-12-05 21:15:30,899 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 59 selfloop transitions, 18 changer transitions 6/83 dead transitions. [2022-12-05 21:15:30,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 596 flow [2022-12-05 21:15:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:15:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:15:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 66 transitions. [2022-12-05 21:15:30,900 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-05 21:15:30,900 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 243 flow. Second operand 11 states and 66 transitions. [2022-12-05 21:15:30,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 596 flow [2022-12-05 21:15:30,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 548 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-12-05 21:15:30,903 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 322 flow [2022-12-05 21:15:30,903 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=322, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2022-12-05 21:15:30,904 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2022-12-05 21:15:30,904 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 322 flow [2022-12-05 21:15:30,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:30,904 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:30,904 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:30,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:31,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:31,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1258834054, now seen corresponding path program 3 times [2022-12-05 21:15:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933459442] [2022-12-05 21:15:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:31,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:31,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933459442] [2022-12-05 21:15:31,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933459442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:31,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554397421] [2022-12-05 21:15:31,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:15:31,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:31,273 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) [2022-12-05 21:15:31,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:15:31,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:15:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:31,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:15:31,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:31,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:31,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554397421] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:31,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:15:31,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-12-05 21:15:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72929766] [2022-12-05 21:15:31,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:31,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:15:31,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:15:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:15:31,448 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 21:15:31,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:31,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:31,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 21:15:31,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:31,501 INFO L130 PetriNetUnfolder]: 180/354 cut-off events. [2022-12-05 21:15:31,502 INFO L131 PetriNetUnfolder]: For 692/702 co-relation queries the response was YES. [2022-12-05 21:15:31,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 354 events. 180/354 cut-off events. For 692/702 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1496 event pairs, 45 based on Foata normal form. 7/349 useless extension candidates. Maximal degree in co-relation 1224. Up to 311 conditions per place. [2022-12-05 21:15:31,504 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 49 selfloop transitions, 10 changer transitions 2/65 dead transitions. [2022-12-05 21:15:31,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 507 flow [2022-12-05 21:15:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:15:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:15:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-05 21:15:31,505 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-05 21:15:31,505 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 322 flow. Second operand 5 states and 35 transitions. [2022-12-05 21:15:31,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 507 flow [2022-12-05 21:15:31,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 450 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-12-05 21:15:31,508 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 334 flow [2022-12-05 21:15:31,509 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2022-12-05 21:15:31,509 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2022-12-05 21:15:31,509 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 334 flow [2022-12-05 21:15:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:31,509 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:31,509 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:31,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:31,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1184645457, now seen corresponding path program 1 times [2022-12-05 21:15:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:31,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297038914] [2022-12-05 21:15:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:32,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:32,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297038914] [2022-12-05 21:15:32,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297038914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898278313] [2022-12-05 21:15:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:32,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:32,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:32,060 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) [2022-12-05 21:15:32,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:15:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:32,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:15:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:32,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:51,635 WARN L233 SmtUtils]: Spent 25.63s on a formula simplification. DAG size of input: 5213 DAG size of output: 5068 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-12-05 21:29:49,125 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:29:49,125 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 [2022-12-05 21:29:50,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 21:29:50,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown