/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 02:31:26,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 02:31:26,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 02:31:26,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 02:31:26,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 02:31:26,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 02:31:26,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 02:31:26,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 02:31:26,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 02:31:26,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 02:31:26,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 02:31:26,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 02:31:26,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 02:31:26,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 02:31:26,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 02:31:26,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 02:31:26,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 02:31:26,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 02:31:26,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 02:31:26,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 02:31:26,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 02:31:26,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 02:31:26,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 02:31:26,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 02:31:26,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 02:31:26,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 02:31:26,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 02:31:26,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 02:31:26,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 02:31:26,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 02:31:26,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 02:31:26,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 02:31:26,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 02:31:26,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 02:31:26,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 02:31:26,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 02:31:26,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 02:31:26,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 02:31:26,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 02:31:26,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 02:31:26,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 02:31:26,516 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-VariableLbe.epf [2023-01-28 02:31:26,543 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 02:31:26,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 02:31:26,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 02:31:26,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 02:31:26,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 02:31:26,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 02:31:26,545 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 02:31:26,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 02:31:26,546 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 02:31:26,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 02:31:26,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 02:31:26,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 02:31:26,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 02:31:26,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 02:31:26,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:31:26,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 02:31:26,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 02:31:26,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 02:31:26,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 02:31:26,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 02:31:26,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 02:31:26,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 02:31:26,548 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 02:31:26,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 02:31:26,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 02:31:26,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 02:31:26,773 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 02:31:26,776 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 02:31:26,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-01-28 02:31:27,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 02:31:27,913 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 02:31:27,913 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-01-28 02:31:27,917 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d95347fdd/48f9480680954c69aeb1554c80c8fece/FLAGa65e3ee0b [2023-01-28 02:31:27,928 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d95347fdd/48f9480680954c69aeb1554c80c8fece [2023-01-28 02:31:27,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 02:31:27,930 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 02:31:27,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 02:31:27,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 02:31:27,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 02:31:27,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:31:27" (1/1) ... [2023-01-28 02:31:27,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9d5234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:27, skipping insertion in model container [2023-01-28 02:31:27,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:31:27" (1/1) ... [2023-01-28 02:31:27,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 02:31:27,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 02:31:28,045 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2023-01-28 02:31:28,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:31:28,056 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 02:31:28,071 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2023-01-28 02:31:28,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:31:28,083 INFO L208 MainTranslator]: Completed translation [2023-01-28 02:31:28,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28 WrapperNode [2023-01-28 02:31:28,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 02:31:28,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 02:31:28,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 02:31:28,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 02:31:28,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,111 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 281 [2023-01-28 02:31:28,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 02:31:28,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 02:31:28,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 02:31:28,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 02:31:28,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 02:31:28,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 02:31:28,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 02:31:28,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 02:31:28,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (1/1) ... [2023-01-28 02:31:28,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:31:28,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:28,151 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) [2023-01-28 02:31:28,177 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 [2023-01-28 02:31:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 02:31:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 02:31:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 02:31:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 02:31:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 02:31:28,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 02:31:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 02:31:28,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 02:31:28,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 02:31:28,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 02:31:28,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 02:31:28,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 02:31:28,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 02:31:28,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 02:31:28,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 02:31:28,204 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 02:31:28,278 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 02:31:28,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 02:31:28,642 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 02:31:28,651 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 02:31:28,651 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 02:31:28,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:31:28 BoogieIcfgContainer [2023-01-28 02:31:28,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 02:31:28,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 02:31:28,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 02:31:28,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 02:31:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 02:31:27" (1/3) ... [2023-01-28 02:31:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9d9fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:31:28, skipping insertion in model container [2023-01-28 02:31:28,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:31:28" (2/3) ... [2023-01-28 02:31:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9d9fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:31:28, skipping insertion in model container [2023-01-28 02:31:28,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:31:28" (3/3) ... [2023-01-28 02:31:28,659 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2023-01-28 02:31:28,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 02:31:28,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 02:31:28,672 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 02:31:28,799 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 02:31:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 324 transitions, 672 flow [2023-01-28 02:31:28,926 INFO L130 PetriNetUnfolder]: 29/321 cut-off events. [2023-01-28 02:31:28,926 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:31:28,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 29/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 494 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-01-28 02:31:28,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 324 transitions, 672 flow [2023-01-28 02:31:28,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 311 transitions, 640 flow [2023-01-28 02:31:28,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 02:31:28,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 311 transitions, 640 flow [2023-01-28 02:31:28,947 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 311 transitions, 640 flow [2023-01-28 02:31:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 311 transitions, 640 flow [2023-01-28 02:31:28,985 INFO L130 PetriNetUnfolder]: 29/311 cut-off events. [2023-01-28 02:31:28,985 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:31:28,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 311 events. 29/311 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 493 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-01-28 02:31:28,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-01-28 02:31:35,418 INFO L134 LiptonReduction]: Checked pairs total: 14156 [2023-01-28 02:31:35,419 INFO L136 LiptonReduction]: Total number of compositions: 352 [2023-01-28 02:31:35,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 02:31:35,432 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;@2401c620, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 02:31:35,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 02:31:35,436 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-01-28 02:31:35,436 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:31:35,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:35,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:35,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:35,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash -266383442, now seen corresponding path program 1 times [2023-01-28 02:31:35,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:35,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140947676] [2023-01-28 02:31:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140947676] [2023-01-28 02:31:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140947676] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:35,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:31:35,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:31:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958011688] [2023-01-28 02:31:35,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:35,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:31:35,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:31:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:31:35,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 676 [2023-01-28 02:31:35,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:35,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:35,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 676 [2023-01-28 02:31:35,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:35,913 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2023-01-28 02:31:35,913 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-01-28 02:31:35,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-01-28 02:31:35,917 INFO L137 encePairwiseOnDemand]: 668/676 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-01-28 02:31:35,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-01-28 02:31:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:31:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:31:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-01-28 02:31:35,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40433925049309666 [2023-01-28 02:31:35,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-01-28 02:31:35,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-01-28 02:31:35,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:35,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-01-28 02:31:35,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:35,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:35,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:35,955 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 820 transitions. [2023-01-28 02:31:35,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-01-28 02:31:35,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 02:31:35,961 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-01-28 02:31:35,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-01-28 02:31:35,966 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-01-28 02:31:35,966 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-01-28 02:31:35,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:35,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:35,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 02:31:35,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:35,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -820998595, now seen corresponding path program 1 times [2023-01-28 02:31:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:35,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886439562] [2023-01-28 02:31:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:35,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:31:36,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:36,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886439562] [2023-01-28 02:31:36,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886439562] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:36,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:31:36,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:31:36,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386758183] [2023-01-28 02:31:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:36,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 02:31:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 02:31:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 02:31:36,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 676 [2023-01-28 02:31:36,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:36,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 676 [2023-01-28 02:31:36,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:36,319 INFO L130 PetriNetUnfolder]: 658/966 cut-off events. [2023-01-28 02:31:36,320 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 02:31:36,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 966 events. 658/966 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3451 event pairs, 253 based on Foata normal form. 1/754 useless extension candidates. Maximal degree in co-relation 1954. Up to 546 conditions per place. [2023-01-28 02:31:36,323 INFO L137 encePairwiseOnDemand]: 673/676 looper letters, 45 selfloop transitions, 2 changer transitions 6/53 dead transitions. [2023-01-28 02:31:36,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 249 flow [2023-01-28 02:31:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:31:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:31:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 894 transitions. [2023-01-28 02:31:36,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408284023668639 [2023-01-28 02:31:36,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 894 transitions. [2023-01-28 02:31:36,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 894 transitions. [2023-01-28 02:31:36,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:36,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 894 transitions. [2023-01-28 02:31:36,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,330 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 3 states and 894 transitions. [2023-01-28 02:31:36,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 249 flow [2023-01-28 02:31:36,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 02:31:36,331 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 104 flow [2023-01-28 02:31:36,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2023-01-28 02:31:36,332 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-01-28 02:31:36,332 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 104 flow [2023-01-28 02:31:36,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:36,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:36,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 02:31:36,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:36,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1628203704, now seen corresponding path program 1 times [2023-01-28 02:31:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:36,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698522493] [2023-01-28 02:31:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:31:36,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698522493] [2023-01-28 02:31:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698522493] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711583606] [2023-01-28 02:31:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:36,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:36,433 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) [2023-01-28 02:31:36,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 02:31:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 02:31:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:31:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:31:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711583606] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:31:36,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:31:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-01-28 02:31:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006513490] [2023-01-28 02:31:36,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:31:36,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 02:31:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 02:31:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:36,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 676 [2023-01-28 02:31:36,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 265.375) internal successors, (2123), 8 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:36,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 676 [2023-01-28 02:31:36,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:36,787 INFO L130 PetriNetUnfolder]: 658/975 cut-off events. [2023-01-28 02:31:36,787 INFO L131 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2023-01-28 02:31:36,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 975 events. 658/975 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3195 event pairs, 477 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 2085. Up to 964 conditions per place. [2023-01-28 02:31:36,790 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 28 selfloop transitions, 15 changer transitions 0/43 dead transitions. [2023-01-28 02:31:36,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 226 flow [2023-01-28 02:31:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:31:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:31:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2023-01-28 02:31:36,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39866863905325445 [2023-01-28 02:31:36,808 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1617 transitions. [2023-01-28 02:31:36,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1617 transitions. [2023-01-28 02:31:36,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:36,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1617 transitions. [2023-01-28 02:31:36,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.5) internal successors, (1617), 6 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,817 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 104 flow. Second operand 6 states and 1617 transitions. [2023-01-28 02:31:36,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 226 flow [2023-01-28 02:31:36,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 02:31:36,818 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 198 flow [2023-01-28 02:31:36,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-01-28 02:31:36,819 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-01-28 02:31:36,819 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 198 flow [2023-01-28 02:31:36,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 265.375) internal successors, (2123), 8 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:36,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:36,820 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:37,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:37,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:37,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1306613477, now seen corresponding path program 2 times [2023-01-28 02:31:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324219193] [2023-01-28 02:31:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 02:31:37,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324219193] [2023-01-28 02:31:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324219193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905141495] [2023-01-28 02:31:37,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:31:37,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:37,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:37,207 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) [2023-01-28 02:31:37,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 02:31:37,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:31:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:37,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 02:31:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 02:31:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 02:31:37,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905141495] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:31:37,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:31:37,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-01-28 02:31:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356328458] [2023-01-28 02:31:37,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:31:37,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 02:31:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 02:31:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:31:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 676 [2023-01-28 02:31:37,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 198 flow. Second operand has 17 states, 17 states have (on average 263.5882352941176) internal successors, (4481), 17 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:37,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:37,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 676 [2023-01-28 02:31:37,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:37,696 INFO L130 PetriNetUnfolder]: 658/978 cut-off events. [2023-01-28 02:31:37,696 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-01-28 02:31:37,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 978 events. 658/978 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3195 event pairs, 477 based on Foata normal form. 1/765 useless extension candidates. Maximal degree in co-relation 2057. Up to 964 conditions per place. [2023-01-28 02:31:37,699 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 28 selfloop transitions, 18 changer transitions 0/46 dead transitions. [2023-01-28 02:31:37,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 308 flow [2023-01-28 02:31:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:31:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:31:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1875 transitions. [2023-01-28 02:31:37,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962383770076078 [2023-01-28 02:31:37,703 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1875 transitions. [2023-01-28 02:31:37,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1875 transitions. [2023-01-28 02:31:37,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:37,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1875 transitions. [2023-01-28 02:31:37,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 267.85714285714283) internal successors, (1875), 7 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:37,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 676.0) internal successors, (5408), 8 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:37,712 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 676.0) internal successors, (5408), 8 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:37,712 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 198 flow. Second operand 7 states and 1875 transitions. [2023-01-28 02:31:37,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 308 flow [2023-01-28 02:31:37,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 284 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-28 02:31:37,714 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 242 flow [2023-01-28 02:31:37,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-01-28 02:31:37,715 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-01-28 02:31:37,715 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 242 flow [2023-01-28 02:31:37,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 263.5882352941176) internal successors, (4481), 17 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:37,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:37,717 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:37,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:37,922 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,SelfDestructingSolverStorable3 [2023-01-28 02:31:37,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:37,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:37,922 INFO L85 PathProgramCache]: Analyzing trace with hash 8528152, now seen corresponding path program 3 times [2023-01-28 02:31:37,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:37,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654712018] [2023-01-28 02:31:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:37,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:38,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:38,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654712018] [2023-01-28 02:31:38,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654712018] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370414767] [2023-01-28 02:31:38,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:31:38,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:38,227 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) [2023-01-28 02:31:38,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 02:31:38,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:31:38,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 02:31:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:38,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:38,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370414767] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:38,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:38,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717068905] [2023-01-28 02:31:38,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:38,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:31:38,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:31:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:31:38,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 676 [2023-01-28 02:31:38,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 273.5) internal successors, (1641), 6 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:38,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:38,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 676 [2023-01-28 02:31:38,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:38,816 INFO L130 PetriNetUnfolder]: 1407/2064 cut-off events. [2023-01-28 02:31:38,816 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-01-28 02:31:38,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4475 conditions, 2064 events. 1407/2064 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8510 event pairs, 477 based on Foata normal form. 1/1561 useless extension candidates. Maximal degree in co-relation 4365. Up to 1015 conditions per place. [2023-01-28 02:31:38,822 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2023-01-28 02:31:38,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 499 flow [2023-01-28 02:31:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:31:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:31:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2023-01-28 02:31:38,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219674556213018 [2023-01-28 02:31:38,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2023-01-28 02:31:38,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2023-01-28 02:31:38,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:38,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2023-01-28 02:31:38,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:38,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:38,830 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:38,830 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 242 flow. Second operand 4 states and 1141 transitions. [2023-01-28 02:31:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 499 flow [2023-01-28 02:31:38,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 463 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-01-28 02:31:38,834 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 239 flow [2023-01-28 02:31:38,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-01-28 02:31:38,836 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2023-01-28 02:31:38,836 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 239 flow [2023-01-28 02:31:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 273.5) internal successors, (1641), 6 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:38,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:38,837 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:38,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 02:31:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:39,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:39,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2105961796, now seen corresponding path program 4 times [2023-01-28 02:31:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:39,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693203909] [2023-01-28 02:31:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:39,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693203909] [2023-01-28 02:31:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693203909] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432373551] [2023-01-28 02:31:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:31:39,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:39,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:39,311 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) [2023-01-28 02:31:39,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 02:31:39,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:31:39,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 02:31:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:39,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:39,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432373551] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:39,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:39,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:39,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116788757] [2023-01-28 02:31:39,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:39,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:31:39,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:31:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:31:39,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 676 [2023-01-28 02:31:39,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 273.5) internal successors, (1641), 6 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:39,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:39,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 676 [2023-01-28 02:31:39,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:39,818 INFO L130 PetriNetUnfolder]: 2025/2955 cut-off events. [2023-01-28 02:31:39,818 INFO L131 PetriNetUnfolder]: For 1137/1137 co-relation queries the response was YES. [2023-01-28 02:31:39,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7394 conditions, 2955 events. 2025/2955 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12771 event pairs, 820 based on Foata normal form. 1/2516 useless extension candidates. Maximal degree in co-relation 7299. Up to 1739 conditions per place. [2023-01-28 02:31:39,829 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2023-01-28 02:31:39,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 509 flow [2023-01-28 02:31:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:31:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:31:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1139 transitions. [2023-01-28 02:31:39,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42122781065088755 [2023-01-28 02:31:39,832 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1139 transitions. [2023-01-28 02:31:39,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1139 transitions. [2023-01-28 02:31:39,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:39,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1139 transitions. [2023-01-28 02:31:39,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:39,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:39,837 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:39,837 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 239 flow. Second operand 4 states and 1139 transitions. [2023-01-28 02:31:39,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 509 flow [2023-01-28 02:31:39,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 84 transitions, 509 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 02:31:39,840 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 288 flow [2023-01-28 02:31:39,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-01-28 02:31:39,841 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-01-28 02:31:39,841 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 288 flow [2023-01-28 02:31:39,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 273.5) internal successors, (1641), 6 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:39,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:39,841 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:39,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:40,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:40,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:40,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:40,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1019027948, now seen corresponding path program 1 times [2023-01-28 02:31:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:40,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583553385] [2023-01-28 02:31:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:40,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:40,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:40,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583553385] [2023-01-28 02:31:40,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583553385] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:40,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695442422] [2023-01-28 02:31:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:40,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:40,342 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) [2023-01-28 02:31:40,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 02:31:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:40,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:40,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695442422] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:40,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:40,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:40,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947585918] [2023-01-28 02:31:40,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:40,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:40,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:40,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:40,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:40,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:40,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:40,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:40,818 INFO L130 PetriNetUnfolder]: 2197/3199 cut-off events. [2023-01-28 02:31:40,818 INFO L131 PetriNetUnfolder]: For 2563/2563 co-relation queries the response was YES. [2023-01-28 02:31:40,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9024 conditions, 3199 events. 2197/3199 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14135 event pairs, 382 based on Foata normal form. 0/2743 useless extension candidates. Maximal degree in co-relation 8926. Up to 1217 conditions per place. [2023-01-28 02:31:40,831 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 88 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-01-28 02:31:40,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 621 flow [2023-01-28 02:31:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1457 transitions. [2023-01-28 02:31:40,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43106508875739646 [2023-01-28 02:31:40,834 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1457 transitions. [2023-01-28 02:31:40,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1457 transitions. [2023-01-28 02:31:40,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:40,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1457 transitions. [2023-01-28 02:31:40,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.4) internal successors, (1457), 5 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:40,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:40,840 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:40,840 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 288 flow. Second operand 5 states and 1457 transitions. [2023-01-28 02:31:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 621 flow [2023-01-28 02:31:40,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 619 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 02:31:40,846 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 333 flow [2023-01-28 02:31:40,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-01-28 02:31:40,847 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-01-28 02:31:40,847 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 333 flow [2023-01-28 02:31:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:40,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:40,848 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:40,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:41,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:41,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:41,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:41,053 INFO L85 PathProgramCache]: Analyzing trace with hash -673776660, now seen corresponding path program 2 times [2023-01-28 02:31:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:41,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311420198] [2023-01-28 02:31:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:41,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311420198] [2023-01-28 02:31:41,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311420198] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10307688] [2023-01-28 02:31:41,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:31:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:41,297 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) [2023-01-28 02:31:41,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 02:31:41,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:31:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:41,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:41,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10307688] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:41,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:41,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136831590] [2023-01-28 02:31:41,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:41,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:41,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:41,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:41,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:41,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:41,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:42,011 INFO L130 PetriNetUnfolder]: 2233/3281 cut-off events. [2023-01-28 02:31:42,011 INFO L131 PetriNetUnfolder]: For 5247/5247 co-relation queries the response was YES. [2023-01-28 02:31:42,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9962 conditions, 3281 events. 2233/3281 cut-off events. For 5247/5247 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15022 event pairs, 777 based on Foata normal form. 22/3083 useless extension candidates. Maximal degree in co-relation 9860. Up to 1558 conditions per place. [2023-01-28 02:31:42,023 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 78 selfloop transitions, 8 changer transitions 15/101 dead transitions. [2023-01-28 02:31:42,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 693 flow [2023-01-28 02:31:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1458 transitions. [2023-01-28 02:31:42,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43136094674556213 [2023-01-28 02:31:42,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1458 transitions. [2023-01-28 02:31:42,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1458 transitions. [2023-01-28 02:31:42,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:42,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1458 transitions. [2023-01-28 02:31:42,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.6) internal successors, (1458), 5 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:42,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:42,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:42,034 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 333 flow. Second operand 5 states and 1458 transitions. [2023-01-28 02:31:42,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 693 flow [2023-01-28 02:31:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 676 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:42,041 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 355 flow [2023-01-28 02:31:42,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-01-28 02:31:42,042 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-01-28 02:31:42,043 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 355 flow [2023-01-28 02:31:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:42,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:42,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:42,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:42,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:42,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:42,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1334638094, now seen corresponding path program 3 times [2023-01-28 02:31:42,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:42,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396134226] [2023-01-28 02:31:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:42,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396134226] [2023-01-28 02:31:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396134226] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856958331] [2023-01-28 02:31:42,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:31:42,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:42,457 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) [2023-01-28 02:31:42,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 02:31:42,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:31:42,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:42,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:42,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856958331] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:42,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:42,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-01-28 02:31:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694795244] [2023-01-28 02:31:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-01-28 02:31:42,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:42,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:42,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:42,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:43,223 INFO L130 PetriNetUnfolder]: 2319/3404 cut-off events. [2023-01-28 02:31:43,223 INFO L131 PetriNetUnfolder]: For 6348/6348 co-relation queries the response was YES. [2023-01-28 02:31:43,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 3404 events. 2319/3404 cut-off events. For 6348/6348 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15599 event pairs, 558 based on Foata normal form. 36/3212 useless extension candidates. Maximal degree in co-relation 10862. Up to 1211 conditions per place. [2023-01-28 02:31:43,243 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 96 selfloop transitions, 13 changer transitions 1/110 dead transitions. [2023-01-28 02:31:43,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 773 flow [2023-01-28 02:31:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1465 transitions. [2023-01-28 02:31:43,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334319526627219 [2023-01-28 02:31:43,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1465 transitions. [2023-01-28 02:31:43,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1465 transitions. [2023-01-28 02:31:43,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:43,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1465 transitions. [2023-01-28 02:31:43,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:43,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:43,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:43,252 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 355 flow. Second operand 5 states and 1465 transitions. [2023-01-28 02:31:43,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 773 flow [2023-01-28 02:31:43,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 110 transitions, 760 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:43,261 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 423 flow [2023-01-28 02:31:43,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-01-28 02:31:43,262 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-01-28 02:31:43,262 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 423 flow [2023-01-28 02:31:43,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:43,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:43,263 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:43,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:43,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:43,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:43,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash -991347606, now seen corresponding path program 4 times [2023-01-28 02:31:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:43,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914388912] [2023-01-28 02:31:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:43,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:43,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914388912] [2023-01-28 02:31:43,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914388912] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:43,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65444131] [2023-01-28 02:31:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:31:43,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:43,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:43,653 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) [2023-01-28 02:31:43,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 02:31:43,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:31:43,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:43,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:43,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65444131] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:43,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:43,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:43,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546278365] [2023-01-28 02:31:43,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:43,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:43,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:43,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:43,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:43,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:43,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:43,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:44,251 INFO L130 PetriNetUnfolder]: 2239/3277 cut-off events. [2023-01-28 02:31:44,251 INFO L131 PetriNetUnfolder]: For 7915/7915 co-relation queries the response was YES. [2023-01-28 02:31:44,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 3277 events. 2239/3277 cut-off events. For 7915/7915 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14785 event pairs, 749 based on Foata normal form. 22/3079 useless extension candidates. Maximal degree in co-relation 11505. Up to 1558 conditions per place. [2023-01-28 02:31:44,268 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 11 changer transitions 13/100 dead transitions. [2023-01-28 02:31:44,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 743 flow [2023-01-28 02:31:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1458 transitions. [2023-01-28 02:31:44,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43136094674556213 [2023-01-28 02:31:44,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1458 transitions. [2023-01-28 02:31:44,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1458 transitions. [2023-01-28 02:31:44,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:44,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1458 transitions. [2023-01-28 02:31:44,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.6) internal successors, (1458), 5 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:44,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:44,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:44,277 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 423 flow. Second operand 5 states and 1458 transitions. [2023-01-28 02:31:44,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 743 flow [2023-01-28 02:31:44,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 743 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 02:31:44,294 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 452 flow [2023-01-28 02:31:44,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-01-28 02:31:44,295 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2023-01-28 02:31:44,295 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 452 flow [2023-01-28 02:31:44,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:44,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:44,295 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:44,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:44,500 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,SelfDestructingSolverStorable9 [2023-01-28 02:31:44,501 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:44,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1221850100, now seen corresponding path program 5 times [2023-01-28 02:31:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:44,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452415046] [2023-01-28 02:31:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:44,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452415046] [2023-01-28 02:31:44,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452415046] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616662076] [2023-01-28 02:31:44,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:31:44,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:44,680 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) [2023-01-28 02:31:44,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 02:31:45,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 02:31:45,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:45,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:45,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616662076] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:45,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:45,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121207657] [2023-01-28 02:31:45,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:45,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:45,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:45,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:45,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:45,454 INFO L130 PetriNetUnfolder]: 2145/3137 cut-off events. [2023-01-28 02:31:45,454 INFO L131 PetriNetUnfolder]: For 10229/10229 co-relation queries the response was YES. [2023-01-28 02:31:45,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 3137 events. 2145/3137 cut-off events. For 10229/10229 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13883 event pairs, 922 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 11531. Up to 2061 conditions per place. [2023-01-28 02:31:45,467 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 79 selfloop transitions, 9 changer transitions 13/101 dead transitions. [2023-01-28 02:31:45,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 787 flow [2023-01-28 02:31:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2023-01-28 02:31:45,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-01-28 02:31:45,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2023-01-28 02:31:45,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2023-01-28 02:31:45,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:45,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2023-01-28 02:31:45,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:45,476 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:45,477 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 452 flow. Second operand 5 states and 1456 transitions. [2023-01-28 02:31:45,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 787 flow [2023-01-28 02:31:45,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 759 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 02:31:45,492 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 449 flow [2023-01-28 02:31:45,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-01-28 02:31:45,492 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2023-01-28 02:31:45,492 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 449 flow [2023-01-28 02:31:45,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:45,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:45,493 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:45,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 02:31:45,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:45,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:45,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1105708102, now seen corresponding path program 6 times [2023-01-28 02:31:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:45,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281941640] [2023-01-28 02:31:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:45,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281941640] [2023-01-28 02:31:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281941640] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417551227] [2023-01-28 02:31:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:31:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:45,871 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) [2023-01-28 02:31:45,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 02:31:46,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:31:46,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:46,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:46,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:46,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417551227] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:46,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:46,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933311967] [2023-01-28 02:31:46,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:46,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:46,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:46,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:46,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:46,470 INFO L130 PetriNetUnfolder]: 2065/3000 cut-off events. [2023-01-28 02:31:46,470 INFO L131 PetriNetUnfolder]: For 9864/9864 co-relation queries the response was YES. [2023-01-28 02:31:46,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 3000 events. 2065/3000 cut-off events. For 9864/9864 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12975 event pairs, 826 based on Foata normal form. 36/2832 useless extension candidates. Maximal degree in co-relation 11190. Up to 1798 conditions per place. [2023-01-28 02:31:46,482 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 97 selfloop transitions, 12 changer transitions 1/110 dead transitions. [2023-01-28 02:31:46,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 841 flow [2023-01-28 02:31:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:31:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:31:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1741 transitions. [2023-01-28 02:31:46,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292406311637081 [2023-01-28 02:31:46,486 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1741 transitions. [2023-01-28 02:31:46,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1741 transitions. [2023-01-28 02:31:46,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:46,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1741 transitions. [2023-01-28 02:31:46,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 290.1666666666667) internal successors, (1741), 6 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:46,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:46,492 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:46,492 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 449 flow. Second operand 6 states and 1741 transitions. [2023-01-28 02:31:46,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 841 flow [2023-01-28 02:31:46,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 813 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 02:31:46,510 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 475 flow [2023-01-28 02:31:46,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=475, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-01-28 02:31:46,511 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-01-28 02:31:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 475 flow [2023-01-28 02:31:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:46,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:46,511 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:46,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:46,716 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,SelfDestructingSolverStorable11 [2023-01-28 02:31:46,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:46,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:46,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1050703873, now seen corresponding path program 1 times [2023-01-28 02:31:46,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:46,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137072039] [2023-01-28 02:31:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:46,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:46,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137072039] [2023-01-28 02:31:46,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137072039] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:46,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054746878] [2023-01-28 02:31:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:46,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:46,909 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) [2023-01-28 02:31:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 02:31:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:47,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054746878] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:47,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2023-01-28 02:31:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688770412] [2023-01-28 02:31:47,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-01-28 02:31:47,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:47,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 475 flow. Second operand has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:47,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:47,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:47,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:47,521 INFO L130 PetriNetUnfolder]: 2188/3163 cut-off events. [2023-01-28 02:31:47,521 INFO L131 PetriNetUnfolder]: For 9105/9105 co-relation queries the response was YES. [2023-01-28 02:31:47,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12221 conditions, 3163 events. 2188/3163 cut-off events. For 9105/9105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14004 event pairs, 180 based on Foata normal form. 76/3027 useless extension candidates. Maximal degree in co-relation 12109. Up to 2033 conditions per place. [2023-01-28 02:31:47,535 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 93 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2023-01-28 02:31:47,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 857 flow [2023-01-28 02:31:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1454 transitions. [2023-01-28 02:31:47,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301775147928994 [2023-01-28 02:31:47,538 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1454 transitions. [2023-01-28 02:31:47,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1454 transitions. [2023-01-28 02:31:47,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:47,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1454 transitions. [2023-01-28 02:31:47,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:47,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:47,543 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:47,543 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 475 flow. Second operand 5 states and 1454 transitions. [2023-01-28 02:31:47,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 857 flow [2023-01-28 02:31:47,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 790 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-01-28 02:31:47,561 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 499 flow [2023-01-28 02:31:47,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-01-28 02:31:47,561 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2023-01-28 02:31:47,562 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 499 flow [2023-01-28 02:31:47,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:47,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:47,562 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:47,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:47,767 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,SelfDestructingSolverStorable12 [2023-01-28 02:31:47,768 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:47,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 80380509, now seen corresponding path program 2 times [2023-01-28 02:31:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787347358] [2023-01-28 02:31:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787347358] [2023-01-28 02:31:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787347358] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462141949] [2023-01-28 02:31:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:31:47,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:47,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:47,939 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) [2023-01-28 02:31:47,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 02:31:48,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:31:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:48,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462141949] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:48,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:48,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:48,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134599545] [2023-01-28 02:31:48,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:48,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:48,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:48,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:48,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:48,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:48,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:48,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:48,603 INFO L130 PetriNetUnfolder]: 2170/3145 cut-off events. [2023-01-28 02:31:48,603 INFO L131 PetriNetUnfolder]: For 9206/9206 co-relation queries the response was YES. [2023-01-28 02:31:48,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12062 conditions, 3145 events. 2170/3145 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13915 event pairs, 752 based on Foata normal form. 18/2951 useless extension candidates. Maximal degree in co-relation 11951. Up to 1803 conditions per place. [2023-01-28 02:31:48,615 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 82 selfloop transitions, 15 changer transitions 0/97 dead transitions. [2023-01-28 02:31:48,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 787 flow [2023-01-28 02:31:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1449 transitions. [2023-01-28 02:31:48,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428698224852071 [2023-01-28 02:31:48,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1449 transitions. [2023-01-28 02:31:48,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1449 transitions. [2023-01-28 02:31:48,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:48,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1449 transitions. [2023-01-28 02:31:48,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:48,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:48,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:48,623 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 499 flow. Second operand 5 states and 1449 transitions. [2023-01-28 02:31:48,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 787 flow [2023-01-28 02:31:48,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 768 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:48,639 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 535 flow [2023-01-28 02:31:48,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-01-28 02:31:48,639 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 43 predicate places. [2023-01-28 02:31:48,639 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 535 flow [2023-01-28 02:31:48,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:48,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:48,640 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:48,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:48,845 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,SelfDestructingSolverStorable13 [2023-01-28 02:31:48,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:48,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash 370126421, now seen corresponding path program 3 times [2023-01-28 02:31:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144337783] [2023-01-28 02:31:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144337783] [2023-01-28 02:31:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144337783] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:49,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599755608] [2023-01-28 02:31:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:31:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:49,038 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) [2023-01-28 02:31:49,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 02:31:49,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:31:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:49,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599755608] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:49,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:49,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265656660] [2023-01-28 02:31:49,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:49,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:49,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:49,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:49,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:49,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:49,670 INFO L130 PetriNetUnfolder]: 2260/3275 cut-off events. [2023-01-28 02:31:49,671 INFO L131 PetriNetUnfolder]: For 10263/10263 co-relation queries the response was YES. [2023-01-28 02:31:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13182 conditions, 3275 events. 2260/3275 cut-off events. For 10263/10263 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14490 event pairs, 770 based on Foata normal form. 76/3131 useless extension candidates. Maximal degree in co-relation 13070. Up to 1825 conditions per place. [2023-01-28 02:31:49,684 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 94 selfloop transitions, 16 changer transitions 1/111 dead transitions. [2023-01-28 02:31:49,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 894 flow [2023-01-28 02:31:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:31:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:31:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1741 transitions. [2023-01-28 02:31:49,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292406311637081 [2023-01-28 02:31:49,687 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1741 transitions. [2023-01-28 02:31:49,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1741 transitions. [2023-01-28 02:31:49,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:49,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1741 transitions. [2023-01-28 02:31:49,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 290.1666666666667) internal successors, (1741), 6 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:49,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:49,694 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:49,694 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 535 flow. Second operand 6 states and 1741 transitions. [2023-01-28 02:31:49,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 894 flow [2023-01-28 02:31:49,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 862 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 02:31:49,712 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 544 flow [2023-01-28 02:31:49,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-01-28 02:31:49,713 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-01-28 02:31:49,713 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 544 flow [2023-01-28 02:31:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:49,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:49,713 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:49,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 02:31:49,918 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,SelfDestructingSolverStorable14 [2023-01-28 02:31:49,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:49,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1112195801, now seen corresponding path program 4 times [2023-01-28 02:31:49,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:49,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505333265] [2023-01-28 02:31:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:50,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:50,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505333265] [2023-01-28 02:31:50,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505333265] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:50,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244745305] [2023-01-28 02:31:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:31:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:50,094 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) [2023-01-28 02:31:50,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 02:31:50,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:31:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:50,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:50,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:50,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244745305] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:50,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:50,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310159295] [2023-01-28 02:31:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:50,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:50,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:50,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:50,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:50,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:50,748 INFO L130 PetriNetUnfolder]: 2242/3257 cut-off events. [2023-01-28 02:31:50,748 INFO L131 PetriNetUnfolder]: For 12776/12776 co-relation queries the response was YES. [2023-01-28 02:31:50,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13563 conditions, 3257 events. 2242/3257 cut-off events. For 12776/12776 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14440 event pairs, 847 based on Foata normal form. 18/3055 useless extension candidates. Maximal degree in co-relation 13450. Up to 2087 conditions per place. [2023-01-28 02:31:50,761 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 87 selfloop transitions, 13 changer transitions 9/109 dead transitions. [2023-01-28 02:31:50,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 924 flow [2023-01-28 02:31:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1453 transitions. [2023-01-28 02:31:50,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298816568047337 [2023-01-28 02:31:50,764 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1453 transitions. [2023-01-28 02:31:50,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1453 transitions. [2023-01-28 02:31:50,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:50,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1453 transitions. [2023-01-28 02:31:50,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:50,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:50,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:50,775 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 544 flow. Second operand 5 states and 1453 transitions. [2023-01-28 02:31:50,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 924 flow [2023-01-28 02:31:50,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 877 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-01-28 02:31:50,798 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 555 flow [2023-01-28 02:31:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2023-01-28 02:31:50,798 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 47 predicate places. [2023-01-28 02:31:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 555 flow [2023-01-28 02:31:50,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:50,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:50,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:50,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:51,004 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:51,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash -293042749, now seen corresponding path program 5 times [2023-01-28 02:31:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:51,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620975283] [2023-01-28 02:31:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620975283] [2023-01-28 02:31:51,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620975283] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817397467] [2023-01-28 02:31:51,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:31:51,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:51,194 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) [2023-01-28 02:31:51,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 02:31:51,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 02:31:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:51,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817397467] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:51,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-01-28 02:31:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656827226] [2023-01-28 02:31:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:51,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-01-28 02:31:51,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:51,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 555 flow. Second operand has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:51,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:51,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:51,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:51,963 INFO L130 PetriNetUnfolder]: 2141/3138 cut-off events. [2023-01-28 02:31:51,963 INFO L131 PetriNetUnfolder]: For 13140/13140 co-relation queries the response was YES. [2023-01-28 02:31:51,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13278 conditions, 3138 events. 2141/3138 cut-off events. For 13140/13140 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13910 event pairs, 847 based on Foata normal form. 76/2998 useless extension candidates. Maximal degree in co-relation 13164. Up to 2087 conditions per place. [2023-01-28 02:31:51,974 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 92 selfloop transitions, 15 changer transitions 1/108 dead transitions. [2023-01-28 02:31:51,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 913 flow [2023-01-28 02:31:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2023-01-28 02:31:51,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-01-28 02:31:51,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2023-01-28 02:31:51,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2023-01-28 02:31:51,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:51,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2023-01-28 02:31:51,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:51,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:51,981 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:51,981 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 555 flow. Second operand 5 states and 1456 transitions. [2023-01-28 02:31:51,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 913 flow [2023-01-28 02:31:52,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 108 transitions, 884 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:52,002 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 577 flow [2023-01-28 02:31:52,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2023-01-28 02:31:52,002 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-01-28 02:31:52,002 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 577 flow [2023-01-28 02:31:52,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:52,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:52,003 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:52,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:52,208 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,SelfDestructingSolverStorable16 [2023-01-28 02:31:52,208 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:52,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2055287147, now seen corresponding path program 6 times [2023-01-28 02:31:52,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:52,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058929238] [2023-01-28 02:31:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:52,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:52,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:52,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058929238] [2023-01-28 02:31:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058929238] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:52,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883230981] [2023-01-28 02:31:52,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:31:52,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:52,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:52,365 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) [2023-01-28 02:31:52,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 02:31:52,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:31:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 02:31:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:31:52,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883230981] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:52,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:52,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-01-28 02:31:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687485728] [2023-01-28 02:31:52,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:31:52,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 676 [2023-01-28 02:31:52,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:52,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:52,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 676 [2023-01-28 02:31:52,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:52,962 INFO L130 PetriNetUnfolder]: 2023/2941 cut-off events. [2023-01-28 02:31:52,962 INFO L131 PetriNetUnfolder]: For 10935/10935 co-relation queries the response was YES. [2023-01-28 02:31:52,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 2941 events. 2023/2941 cut-off events. For 10935/10935 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12653 event pairs, 847 based on Foata normal form. 18/2759 useless extension candidates. Maximal degree in co-relation 12053. Up to 2087 conditions per place. [2023-01-28 02:31:52,975 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 76 selfloop transitions, 15 changer transitions 10/101 dead transitions. [2023-01-28 02:31:52,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 101 transitions, 881 flow [2023-01-28 02:31:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:31:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:31:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1449 transitions. [2023-01-28 02:31:52,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428698224852071 [2023-01-28 02:31:52,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1449 transitions. [2023-01-28 02:31:52,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1449 transitions. [2023-01-28 02:31:52,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:52,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1449 transitions. [2023-01-28 02:31:52,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:52,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:52,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:52,982 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 577 flow. Second operand 5 states and 1449 transitions. [2023-01-28 02:31:52,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 101 transitions, 881 flow [2023-01-28 02:31:53,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 859 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:53,002 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 573 flow [2023-01-28 02:31:53,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-01-28 02:31:53,003 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-01-28 02:31:53,003 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 573 flow [2023-01-28 02:31:53,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.8) internal successors, (1414), 5 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:53,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:53,003 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:53,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 02:31:53,209 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:53,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1707227891, now seen corresponding path program 1 times [2023-01-28 02:31:53,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:53,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920089619] [2023-01-28 02:31:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:53,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-01-28 02:31:53,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920089619] [2023-01-28 02:31:53,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920089619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610348808] [2023-01-28 02:31:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:53,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:53,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:53,405 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) [2023-01-28 02:31:53,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 02:31:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:53,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 82 conjunts are in the unsatisfiable core [2023-01-28 02:31:53,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:31:53,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:31:54,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:54,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-01-28 02:31:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:55,803 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (.cse3 (< |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (and (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse1 (select (select .cse0 ~o_4~0.base) c_~o_4~0.offset)) (.cse2 (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))) (or (<= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) .cse1) (< .cse2 .cse1) (< .cse1 .cse2))))) .cse3) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse6 (select (select .cse7 ~o_4~0.base) c_~o_4~0.offset)) (.cse8 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse4 (select .cse7 ~o_2~0.base))) (or (not (= (select .cse4 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (<= (select .cse4 c_~o_2~0.offset) .cse6)))) (< .cse8 .cse6) (< .cse6 .cse8))))) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse10 (select (select .cse11 ~o_4~0.base) c_~o_4~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse9 (select .cse11 ~o_2~0.base))) (or (not (= (select .cse9 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (< .cse10 (select .cse9 c_~o_2~0.offset))))) (<= (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset) .cse10))))) (or .cse3 (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse13 (select (select .cse12 ~o_4~0.base) c_~o_4~0.offset))) (or (<= (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset) .cse13) (< .cse13 (select (select .cse12 ~o_2~0.base) c_~o_2~0.offset))))))) (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse14 (select (select .cse15 ~o_4~0.base) c_~o_4~0.offset))) (or (<= .cse14 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (< (select (select .cse15 ~o_2~0.base) c_~o_2~0.offset) .cse14))))) .cse3) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse16 (select (select .cse17 ~o_4~0.base) c_~o_4~0.offset))) (or (<= .cse16 (select (select .cse17 c_~o_0~0.base) c_~o_0~0.offset)) (forall ((~o_2~0.base Int)) (let ((.cse18 (select .cse17 ~o_2~0.base))) (or (not (= (select .cse18 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (< (select .cse18 c_~o_2~0.offset) .cse16)))))))) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse20 (select (select .cse21 ~o_4~0.base) c_~o_4~0.offset)) (.cse22 (select (select .cse21 c_~o_0~0.base) c_~o_0~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse19 (select .cse21 ~o_2~0.base))) (or (not (= (select .cse19 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (<= .cse20 (select .cse19 c_~o_2~0.offset))))) (< .cse22 .cse20) (< .cse20 .cse22))))) (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse23 (select (select .cse24 ~o_4~0.base) c_~o_4~0.offset)) (.cse25 (select (select .cse24 c_~o_0~0.base) c_~o_0~0.offset))) (or (<= .cse23 (select (select .cse24 ~o_2~0.base) c_~o_2~0.offset)) (< .cse25 .cse23) (< .cse23 .cse25))))) .cse3))) is different from false [2023-01-28 02:31:55,916 INFO L321 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-01-28 02:31:55,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 273 [2023-01-28 02:31:55,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:55,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 198 [2023-01-28 02:31:59,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:31:59,196 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-01-28 02:31:59,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 1 [2023-01-28 02:31:59,199 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:31:59,202 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-01-28 02:31:59,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 1 [2023-01-28 02:31:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:31:59,206 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-01-28 02:31:59,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 1 [2023-01-28 02:31:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:31:59,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610348808] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:31:59,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:31:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 16, 14] total 34 [2023-01-28 02:31:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862083804] [2023-01-28 02:31:59,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:31:59,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 02:31:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 02:31:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1005, Unknown=1, NotChecked=64, Total=1190 [2023-01-28 02:31:59,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 676 [2023-01-28 02:31:59,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 573 flow. Second operand has 35 states, 35 states have (on average 223.57142857142858) internal successors, (7825), 35 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:31:59,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:59,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 676 [2023-01-28 02:31:59,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:02,598 INFO L130 PetriNetUnfolder]: 3918/5639 cut-off events. [2023-01-28 02:32:02,598 INFO L131 PetriNetUnfolder]: For 25606/25606 co-relation queries the response was YES. [2023-01-28 02:32:02,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23438 conditions, 5639 events. 3918/5639 cut-off events. For 25606/25606 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27801 event pairs, 749 based on Foata normal form. 2/5273 useless extension candidates. Maximal degree in co-relation 23323. Up to 1655 conditions per place. [2023-01-28 02:32:02,626 INFO L137 encePairwiseOnDemand]: 660/676 looper letters, 219 selfloop transitions, 55 changer transitions 114/388 dead transitions. [2023-01-28 02:32:02,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 388 transitions, 4182 flow [2023-01-28 02:32:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:32:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:32:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5063 transitions. [2023-01-28 02:32:02,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34043840774610007 [2023-01-28 02:32:02,634 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5063 transitions. [2023-01-28 02:32:02,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5063 transitions. [2023-01-28 02:32:02,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:02,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5063 transitions. [2023-01-28 02:32:02,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 230.13636363636363) internal successors, (5063), 22 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:02,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 676.0) internal successors, (15548), 23 states have internal predecessors, (15548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:02,652 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 676.0) internal successors, (15548), 23 states have internal predecessors, (15548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:02,652 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 573 flow. Second operand 22 states and 5063 transitions. [2023-01-28 02:32:02,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 388 transitions, 4182 flow [2023-01-28 02:32:02,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 388 transitions, 3752 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-01-28 02:32:02,682 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 1297 flow [2023-01-28 02:32:02,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1297, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2023-01-28 02:32:02,682 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 81 predicate places. [2023-01-28 02:32:02,682 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 1297 flow [2023-01-28 02:32:02,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 223.57142857142858) internal successors, (7825), 35 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:02,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:02,684 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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] [2023-01-28 02:32:02,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 02:32:02,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:02,890 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:02,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash 361103584, now seen corresponding path program 2 times [2023-01-28 02:32:02,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:02,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091259409] [2023-01-28 02:32:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:02,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-01-28 02:32:03,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:03,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091259409] [2023-01-28 02:32:03,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091259409] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:32:03,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48711008] [2023-01-28 02:32:03,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:32:03,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:03,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:32:03,082 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) [2023-01-28 02:32:03,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 02:32:03,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:32:03,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:32:03,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 02:32:03,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:32:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:32:03,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:32:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-01-28 02:32:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48711008] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:32:04,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:32:04,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 10] total 24 [2023-01-28 02:32:04,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966084418] [2023-01-28 02:32:04,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:32:04,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 02:32:04,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:04,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 02:32:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-01-28 02:32:04,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 676 [2023-01-28 02:32:04,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 1297 flow. Second operand has 25 states, 25 states have (on average 256.08) internal successors, (6402), 25 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:04,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:04,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 676 [2023-01-28 02:32:04,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:07,880 INFO L130 PetriNetUnfolder]: 9070/13068 cut-off events. [2023-01-28 02:32:07,880 INFO L131 PetriNetUnfolder]: For 124535/124535 co-relation queries the response was YES. [2023-01-28 02:32:07,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75424 conditions, 13068 events. 9070/13068 cut-off events. For 124535/124535 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70112 event pairs, 731 based on Foata normal form. 9/13077 useless extension candidates. Maximal degree in co-relation 75374. Up to 3195 conditions per place. [2023-01-28 02:32:07,968 INFO L137 encePairwiseOnDemand]: 661/676 looper letters, 325 selfloop transitions, 267 changer transitions 369/961 dead transitions. [2023-01-28 02:32:07,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 961 transitions, 12493 flow [2023-01-28 02:32:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 02:32:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 02:32:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 13413 transitions. [2023-01-28 02:32:07,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890532544378698 [2023-01-28 02:32:07,977 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 13413 transitions. [2023-01-28 02:32:07,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 13413 transitions. [2023-01-28 02:32:07,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:07,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 13413 transitions. [2023-01-28 02:32:07,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 263.0) internal successors, (13413), 51 states have internal predecessors, (13413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:08,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 676.0) internal successors, (35152), 52 states have internal predecessors, (35152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:08,029 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 676.0) internal successors, (35152), 52 states have internal predecessors, (35152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:08,030 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 1297 flow. Second operand 51 states and 13413 transitions. [2023-01-28 02:32:08,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 961 transitions, 12493 flow [2023-01-28 02:32:08,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 961 transitions, 11350 flow, removed 559 selfloop flow, removed 8 redundant places. [2023-01-28 02:32:08,417 INFO L231 Difference]: Finished difference. Result has 192 places, 388 transitions, 5981 flow [2023-01-28 02:32:08,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5981, PETRI_PLACES=192, PETRI_TRANSITIONS=388} [2023-01-28 02:32:08,417 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 158 predicate places. [2023-01-28 02:32:08,417 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 388 transitions, 5981 flow [2023-01-28 02:32:08,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 256.08) internal successors, (6402), 25 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:08,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:08,419 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:08,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 02:32:08,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:08,625 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:08,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -489564831, now seen corresponding path program 3 times [2023-01-28 02:32:08,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:08,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972051255] [2023-01-28 02:32:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:08,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-01-28 02:32:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972051255] [2023-01-28 02:32:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972051255] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:32:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125093289] [2023-01-28 02:32:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:32:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:32:10,617 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) [2023-01-28 02:32:10,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 02:32:11,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-28 02:32:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:32:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 85 conjunts are in the unsatisfiable core [2023-01-28 02:32:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:32:11,932 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 02:32:11,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2023-01-28 02:32:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-01-28 02:32:12,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:32:13,634 INFO L321 Elim1Store]: treesize reduction 19, result has 90.7 percent of original size [2023-01-28 02:32:13,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 199 [2023-01-28 02:32:16,728 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-01-28 02:32:16,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 1 [2023-01-28 02:32:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-01-28 02:32:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125093289] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:32:16,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:32:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 39 [2023-01-28 02:32:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285523326] [2023-01-28 02:32:16,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:32:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 02:32:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 02:32:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2023-01-28 02:32:16,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 676 [2023-01-28 02:32:16,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 388 transitions, 5981 flow. Second operand has 40 states, 40 states have (on average 225.075) internal successors, (9003), 40 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:16,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:16,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 676 [2023-01-28 02:32:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:42,423 INFO L130 PetriNetUnfolder]: 15096/21763 cut-off events. [2023-01-28 02:32:42,424 INFO L131 PetriNetUnfolder]: For 437570/437570 co-relation queries the response was YES. [2023-01-28 02:32:42,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169243 conditions, 21763 events. 15096/21763 cut-off events. For 437570/437570 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 124707 event pairs, 1042 based on Foata normal form. 45/21808 useless extension candidates. Maximal degree in co-relation 169103. Up to 6203 conditions per place. [2023-01-28 02:32:42,658 INFO L137 encePairwiseOnDemand]: 658/676 looper letters, 648 selfloop transitions, 844 changer transitions 253/1745 dead transitions. [2023-01-28 02:32:42,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1745 transitions, 27640 flow [2023-01-28 02:32:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-01-28 02:32:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-01-28 02:32:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 21489 transitions. [2023-01-28 02:32:42,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34181141439205953 [2023-01-28 02:32:42,681 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 21489 transitions. [2023-01-28 02:32:42,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 21489 transitions. [2023-01-28 02:32:42,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:42,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 21489 transitions. [2023-01-28 02:32:42,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 231.06451612903226) internal successors, (21489), 93 states have internal predecessors, (21489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:42,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 676.0) internal successors, (63544), 94 states have internal predecessors, (63544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:42,759 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 676.0) internal successors, (63544), 94 states have internal predecessors, (63544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:42,760 INFO L175 Difference]: Start difference. First operand has 192 places, 388 transitions, 5981 flow. Second operand 93 states and 21489 transitions. [2023-01-28 02:32:42,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1745 transitions, 27640 flow [2023-01-28 02:32:46,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1745 transitions, 24299 flow, removed 1665 selfloop flow, removed 24 redundant places. [2023-01-28 02:32:46,522 INFO L231 Difference]: Finished difference. Result has 285 places, 1104 transitions, 17571 flow [2023-01-28 02:32:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=17571, PETRI_PLACES=285, PETRI_TRANSITIONS=1104} [2023-01-28 02:32:46,523 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2023-01-28 02:32:46,523 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1104 transitions, 17571 flow [2023-01-28 02:32:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 225.075) internal successors, (9003), 40 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:46,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:46,524 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:46,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-28 02:32:46,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:46,730 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:46,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash -541040723, now seen corresponding path program 4 times [2023-01-28 02:32:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:46,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479422683] [2023-01-28 02:32:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:46,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-01-28 02:32:49,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:49,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479422683] [2023-01-28 02:32:49,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479422683] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:32:49,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167069551] [2023-01-28 02:32:49,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:32:49,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:32:49,320 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) [2023-01-28 02:32:49,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 02:32:49,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:32:49,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:32:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 84 conjunts are in the unsatisfiable core [2023-01-28 02:32:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:32:49,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:32:49,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 02:32:50,092 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 02:32:50,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-01-28 02:32:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-01-28 02:32:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:32:51,225 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_2156 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2156))) (let ((.cse4 (select .cse3 ~o_2~0.base))) (or (forall ((~o_4~0.base Int)) (let ((.cse0 (select .cse4 c_~o_2~0.offset)) (.cse1 (select (select .cse3 ~o_4~0.base) c_~o_4~0.offset)) (.cse2 (select (select .cse3 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse0 .cse1) (= .cse2 .cse1) (< .cse0 .cse1) (< .cse1 .cse2)))) (not (= (select .cse4 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)))))) (forall ((v_ArrVal_2156 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2156))) (let ((.cse6 (select .cse9 ~o_2~0.base))) (or (not (= (select .cse6 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (forall ((~o_4~0.base Int)) (let ((.cse7 (select .cse6 c_~o_2~0.offset)) (.cse8 (select (select .cse9 ~o_4~0.base) c_~o_4~0.offset))) (or (= .cse7 .cse8) (< .cse8 .cse7) (<= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) .cse8)))))))))) is different from false [2023-01-28 02:32:51,335 INFO L321 Elim1Store]: treesize reduction 23, result has 81.0 percent of original size [2023-01-28 02:32:51,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 269 [2023-01-28 02:32:51,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:32:51,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 198 [2023-01-28 02:32:55,574 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 02:32:55,577 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-01-28 02:32:55,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 1 [2023-01-28 02:32:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-01-28 02:32:55,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167069551] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:32:55,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:32:55,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 14] total 48 [2023-01-28 02:32:55,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22842137] [2023-01-28 02:32:55,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:32:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-01-28 02:32:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:55,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-01-28 02:32:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2173, Unknown=1, NotChecked=94, Total=2450 [2023-01-28 02:32:55,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 676 [2023-01-28 02:32:55,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1104 transitions, 17571 flow. Second operand has 50 states, 50 states have (on average 200.02) internal successors, (10001), 50 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:55,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:55,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 676 [2023-01-28 02:32:55,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:33:13,584 INFO L130 PetriNetUnfolder]: 23286/33325 cut-off events. [2023-01-28 02:33:13,584 INFO L131 PetriNetUnfolder]: For 1557338/1557338 co-relation queries the response was YES. [2023-01-28 02:33:13,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342277 conditions, 33325 events. 23286/33325 cut-off events. For 1557338/1557338 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 200788 event pairs, 1080 based on Foata normal form. 24/33349 useless extension candidates. Maximal degree in co-relation 342080. Up to 9262 conditions per place. [2023-01-28 02:33:14,122 INFO L137 encePairwiseOnDemand]: 655/676 looper letters, 1351 selfloop transitions, 1097 changer transitions 141/2589 dead transitions. [2023-01-28 02:33:14,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2589 transitions, 48666 flow [2023-01-28 02:33:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-01-28 02:33:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-01-28 02:33:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 11553 transitions. [2023-01-28 02:33:14,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051827979712595 [2023-01-28 02:33:14,130 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 11553 transitions. [2023-01-28 02:33:14,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 11553 transitions. [2023-01-28 02:33:14,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:33:14,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 11553 transitions. [2023-01-28 02:33:14,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 206.30357142857142) internal successors, (11553), 56 states have internal predecessors, (11553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:33:14,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 676.0) internal successors, (38532), 57 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:33:14,161 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 676.0) internal successors, (38532), 57 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:33:14,161 INFO L175 Difference]: Start difference. First operand has 285 places, 1104 transitions, 17571 flow. Second operand 56 states and 11553 transitions. [2023-01-28 02:33:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2589 transitions, 48666 flow [2023-01-28 02:33:29,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 2589 transitions, 45133 flow, removed 1696 selfloop flow, removed 10 redundant places. [2023-01-28 02:33:29,484 INFO L231 Difference]: Finished difference. Result has 353 places, 1657 transitions, 29562 flow [2023-01-28 02:33:29,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=15470, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=29562, PETRI_PLACES=353, PETRI_TRANSITIONS=1657} [2023-01-28 02:33:29,485 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 319 predicate places. [2023-01-28 02:33:29,485 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1657 transitions, 29562 flow [2023-01-28 02:33:29,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 200.02) internal successors, (10001), 50 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:33:29,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:33:29,486 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:33:29,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-28 02:33:29,691 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,SelfDestructingSolverStorable21 [2023-01-28 02:33:29,691 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:33:29,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:33:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1981758789, now seen corresponding path program 5 times [2023-01-28 02:33:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:33:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118599344] [2023-01-28 02:33:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:33:29,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:33:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:33:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-01-28 02:33:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:33:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118599344] [2023-01-28 02:33:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118599344] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:33:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691574128] [2023-01-28 02:33:32,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:33:32,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:33:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:33:32,490 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) [2023-01-28 02:33:32,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 02:33:32,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-01-28 02:33:32,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:33:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 02:33:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:33:33,362 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 02:33:33,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-01-28 02:33:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-01-28 02:33:33,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:33:34,730 INFO L321 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-01-28 02:33:34,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 98 [2023-01-28 02:33:34,826 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-01-28 02:33:34,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 1 [2023-01-28 02:33:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-01-28 02:33:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691574128] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:33:34,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:33:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 12] total 51 [2023-01-28 02:33:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374484655] [2023-01-28 02:33:34,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:33:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 02:33:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:33:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 02:33:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 02:33:34,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 676 [2023-01-28 02:33:34,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1657 transitions, 29562 flow. Second operand has 52 states, 52 states have (on average 190.90384615384616) internal successors, (9927), 52 states have internal predecessors, (9927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:33:34,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:33:34,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 676 [2023-01-28 02:33:34,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:35:26,235 INFO L130 PetriNetUnfolder]: 155389/221984 cut-off events. [2023-01-28 02:35:26,235 INFO L131 PetriNetUnfolder]: For 12561849/12561849 co-relation queries the response was YES. [2023-01-28 02:35:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448562 conditions, 221984 events. 155389/221984 cut-off events. For 12561849/12561849 co-relation queries the response was YES. Maximal size of possible extension queue 5366. Compared 1680300 event pairs, 11732 based on Foata normal form. 88/222072 useless extension candidates. Maximal degree in co-relation 2448327. Up to 60896 conditions per place. [2023-01-28 02:35:32,162 INFO L137 encePairwiseOnDemand]: 656/676 looper letters, 6731 selfloop transitions, 8345 changer transitions 236/15312 dead transitions. [2023-01-28 02:35:32,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 15312 transitions, 320909 flow [2023-01-28 02:35:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2023-01-28 02:35:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2023-01-28 02:35:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 41028 transitions. [2023-01-28 02:35:32,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29178994082840237 [2023-01-28 02:35:32,245 INFO L72 ComplementDD]: Start complementDD. Operand 208 states and 41028 transitions. [2023-01-28 02:35:32,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 41028 transitions. [2023-01-28 02:35:32,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:35:32,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 208 states and 41028 transitions. [2023-01-28 02:35:32,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 209 states, 208 states have (on average 197.25) internal successors, (41028), 208 states have internal predecessors, (41028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:35:32,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 209 states, 209 states have (on average 676.0) internal successors, (141284), 209 states have internal predecessors, (141284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:35:32,398 INFO L81 ComplementDD]: Finished complementDD. Result has 209 states, 209 states have (on average 676.0) internal successors, (141284), 209 states have internal predecessors, (141284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:35:32,398 INFO L175 Difference]: Start difference. First operand has 353 places, 1657 transitions, 29562 flow. Second operand 208 states and 41028 transitions. [2023-01-28 02:35:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 15312 transitions, 320909 flow Received shutdown request... [2023-01-28 02:45:06,683 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 [2023-01-28 02:45:06,721 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 02:45:07,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 02:45:07,801 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