/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/popl20-bad-ring-nondet.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:49:56,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:49:57,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:49:57,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:49:57,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:49:57,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:49:57,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:49:57,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:49:57,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:49:57,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:49:57,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:49:57,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:49:57,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:49:57,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:49:57,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:49:57,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:49:57,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:49:57,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:49:57,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:49:57,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:49:57,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:49:57,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:49:57,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:49:57,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:49:57,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 03:49:57,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 03:49:57,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 03:49:57,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 03:49:57,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 03:49:57,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 03:49:57,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:49:57,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:49:57,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:49:57,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:49:57,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:49:57,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:49:57,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:49:57,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:49:57,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:49:57,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:49:57,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:49:57,088 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 03:49:57,113 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:49:57,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:49:57,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:49:57,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:49:57,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:49:57,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:49:57,116 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:49:57,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:49:57,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:49:57,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:49:57,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:49:57,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:49:57,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:49:57,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:49:57,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:49:57,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:49:57,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:49:57,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:49:57,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:49:57,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:49:57,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:49:57,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:49:57,119 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:49:57,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:49:57,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:49:57,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:49:57,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:49:57,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:49:57,343 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:49:57,343 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:49:57,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-01-28 03:49:58,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:49:58,583 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:49:58,583 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-01-28 03:49:58,591 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f06a8644/33615cbc034546e3b3017515ebd2b994/FLAGbb14389b0 [2023-01-28 03:49:58,607 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f06a8644/33615cbc034546e3b3017515ebd2b994 [2023-01-28 03:49:58,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:49:58,611 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:49:58,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:49:58,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:49:58,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:49:58,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c24865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58, skipping insertion in model container [2023-01-28 03:49:58,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:49:58,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:49:58,772 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/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-01-28 03:49:58,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:49:58,787 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:49:58,834 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/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-01-28 03:49:58,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:49:58,843 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:49:58,844 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:49:58,849 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:49:58,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58 WrapperNode [2023-01-28 03:49:58,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:49:58,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:49:58,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:49:58,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:49:58,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,898 INFO L138 Inliner]: procedures = 25, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 327 [2023-01-28 03:49:58,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:49:58,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:49:58,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:49:58,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:49:58,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,933 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:49:58,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:49:58,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:49:58,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:49:58,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (1/1) ... [2023-01-28 03:49:58,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:49:58,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:49:58,988 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 03:49:58,992 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 03:49:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:49:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:49:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:49:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:49:59,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:49:59,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 03:49:59,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:49:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:49:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:49:59,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:49:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:49:59,020 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 03:49:59,162 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:49:59,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:49:59,549 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:49:59,656 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:49:59,656 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 03:49:59,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:49:59 BoogieIcfgContainer [2023-01-28 03:49:59,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:49:59,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:49:59,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:49:59,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:49:59,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:49:58" (1/3) ... [2023-01-28 03:49:59,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1150d8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:49:59, skipping insertion in model container [2023-01-28 03:49:59,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:49:58" (2/3) ... [2023-01-28 03:49:59,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1150d8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:49:59, skipping insertion in model container [2023-01-28 03:49:59,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:49:59" (3/3) ... [2023-01-28 03:49:59,666 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-01-28 03:49:59,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:49:59,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:49:59,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:49:59,783 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 03:49:59,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 266 transitions, 556 flow [2023-01-28 03:49:59,909 INFO L130 PetriNetUnfolder]: 25/263 cut-off events. [2023-01-28 03:49:59,909 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 03:49:59,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 263 events. 25/263 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 225. Up to 4 conditions per place. [2023-01-28 03:49:59,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 266 transitions, 556 flow [2023-01-28 03:49:59,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 253 transitions, 524 flow [2023-01-28 03:49:59,932 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:49:59,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 253 transitions, 524 flow [2023-01-28 03:49:59,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 253 transitions, 524 flow [2023-01-28 03:49:59,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 253 transitions, 524 flow [2023-01-28 03:50:00,008 INFO L130 PetriNetUnfolder]: 25/253 cut-off events. [2023-01-28 03:50:00,009 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 03:50:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 25/253 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 225. Up to 4 conditions per place. [2023-01-28 03:50:00,013 INFO L119 LiptonReduction]: Number of co-enabled transitions 2820 [2023-01-28 03:50:07,743 INFO L134 LiptonReduction]: Checked pairs total: 5537 [2023-01-28 03:50:07,744 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-01-28 03:50:07,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:50:07,761 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;@1a7fae38, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:50:07,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 03:50:07,785 INFO L130 PetriNetUnfolder]: 10/36 cut-off events. [2023-01-28 03:50:07,786 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 03:50:07,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:07,786 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 03:50:07,787 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 03:50:07,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1470675208, now seen corresponding path program 1 times [2023-01-28 03:50:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150102701] [2023-01-28 03:50:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:08,056 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 03:50:08,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150102701] [2023-01-28 03:50:08,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150102701] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:08,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:08,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 03:50:08,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724727105] [2023-01-28 03:50:08,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 03:50:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 03:50:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 03:50:08,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 533 [2023-01-28 03:50:08,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 246.0) internal successors, (492), 2 states have internal predecessors, (492), 0 states have call successors, (0), 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 03:50:08,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:08,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 533 [2023-01-28 03:50:08,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:08,234 INFO L130 PetriNetUnfolder]: 748/1046 cut-off events. [2023-01-28 03:50:08,234 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-28 03:50:08,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 1046 events. 748/1046 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3214 event pairs, 493 based on Foata normal form. 0/791 useless extension candidates. Maximal degree in co-relation 1908. Up to 1047 conditions per place. [2023-01-28 03:50:08,241 INFO L137 encePairwiseOnDemand]: 531/533 looper letters, 35 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-01-28 03:50:08,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 158 flow [2023-01-28 03:50:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 03:50:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 03:50:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 507 transitions. [2023-01-28 03:50:08,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2023-01-28 03:50:08,257 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 507 transitions. [2023-01-28 03:50:08,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 507 transitions. [2023-01-28 03:50:08,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:08,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 507 transitions. [2023-01-28 03:50:08,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 0 states have call successors, (0), 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 03:50:08,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 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 03:50:08,272 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 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 03:50:08,274 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 92 flow. Second operand 2 states and 507 transitions. [2023-01-28 03:50:08,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 158 flow [2023-01-28 03:50:08,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 03:50:08,280 INFO L231 Difference]: Finished difference. Result has 32 places, 35 transitions, 76 flow [2023-01-28 03:50:08,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=35} [2023-01-28 03:50:08,286 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-01-28 03:50:08,286 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 35 transitions, 76 flow [2023-01-28 03:50:08,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.0) internal successors, (492), 2 states have internal predecessors, (492), 0 states have call successors, (0), 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 03:50:08,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:08,287 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] [2023-01-28 03:50:08,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:50:08,288 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 03:50:08,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash -875827311, now seen corresponding path program 1 times [2023-01-28 03:50:08,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111585467] [2023-01-28 03:50:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:08,645 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 03:50:08,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111585467] [2023-01-28 03:50:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111585467] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:08,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:08,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:50:08,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272205611] [2023-01-28 03:50:08,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:08,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:50:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:50:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:50:08,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 533 [2023-01-28 03:50:08,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 35 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 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 03:50:08,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:08,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 533 [2023-01-28 03:50:08,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:08,852 INFO L130 PetriNetUnfolder]: 869/1262 cut-off events. [2023-01-28 03:50:08,852 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-28 03:50:08,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 1262 events. 869/1262 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4221 event pairs, 595 based on Foata normal form. 84/1070 useless extension candidates. Maximal degree in co-relation 2569. Up to 1047 conditions per place. [2023-01-28 03:50:08,858 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 34 selfloop transitions, 2 changer transitions 33/69 dead transitions. [2023-01-28 03:50:08,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 69 transitions, 288 flow [2023-01-28 03:50:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:50:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:50:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-01-28 03:50:08,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399624765478424 [2023-01-28 03:50:08,864 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-01-28 03:50:08,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-01-28 03:50:08,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:08,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-01-28 03:50:08,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 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 03:50:08,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 03:50:08,872 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 03:50:08,873 INFO L175 Difference]: Start difference. First operand has 32 places, 35 transitions, 76 flow. Second operand 5 states and 1065 transitions. [2023-01-28 03:50:08,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 69 transitions, 288 flow [2023-01-28 03:50:08,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 03:50:08,875 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 106 flow [2023-01-28 03:50:08,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-01-28 03:50:08,878 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-01-28 03:50:08,878 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 106 flow [2023-01-28 03:50:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 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 03:50:08,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:08,879 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 03:50:08,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:50:08,880 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 03:50:08,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1983495064, now seen corresponding path program 1 times [2023-01-28 03:50:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:08,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081069766] [2023-01-28 03:50:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:50:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081069766] [2023-01-28 03:50:09,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081069766] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:09,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:09,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:50:09,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826559114] [2023-01-28 03:50:09,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:50:09,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:50:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:50:09,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 533 [2023-01-28 03:50:09,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 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 03:50:09,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:09,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 533 [2023-01-28 03:50:09,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:09,311 INFO L130 PetriNetUnfolder]: 996/1430 cut-off events. [2023-01-28 03:50:09,311 INFO L131 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2023-01-28 03:50:09,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3398 conditions, 1430 events. 996/1430 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4889 event pairs, 680 based on Foata normal form. 82/1199 useless extension candidates. Maximal degree in co-relation 3391. Up to 1048 conditions per place. [2023-01-28 03:50:09,317 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 35 selfloop transitions, 2 changer transitions 22/59 dead transitions. [2023-01-28 03:50:09,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 292 flow [2023-01-28 03:50:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:50:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:50:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-01-28 03:50:09,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40196998123827393 [2023-01-28 03:50:09,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-01-28 03:50:09,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-01-28 03:50:09,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:09,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-01-28 03:50:09,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 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 03:50:09,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 03:50:09,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 03:50:09,329 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 106 flow. Second operand 4 states and 857 transitions. [2023-01-28 03:50:09,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 292 flow [2023-01-28 03:50:09,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 276 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:09,332 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 114 flow [2023-01-28 03:50:09,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-28 03:50:09,333 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-01-28 03:50:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 114 flow [2023-01-28 03:50:09,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 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 03:50:09,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:09,337 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] [2023-01-28 03:50:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:50:09,337 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 03:50:09,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash -11726098, now seen corresponding path program 1 times [2023-01-28 03:50:09,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:09,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79153801] [2023-01-28 03:50:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79153801] [2023-01-28 03:50:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79153801] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:09,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:50:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860758386] [2023-01-28 03:50:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:50:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:50:09,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:50:09,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 533 [2023-01-28 03:50:09,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 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 03:50:09,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:09,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 533 [2023-01-28 03:50:09,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:09,708 INFO L130 PetriNetUnfolder]: 1247/1783 cut-off events. [2023-01-28 03:50:09,709 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2023-01-28 03:50:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4553 conditions, 1783 events. 1247/1783 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6452 event pairs, 870 based on Foata normal form. 92/1464 useless extension candidates. Maximal degree in co-relation 4544. Up to 1049 conditions per place. [2023-01-28 03:50:09,717 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 36 selfloop transitions, 2 changer transitions 24/62 dead transitions. [2023-01-28 03:50:09,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 311 flow [2023-01-28 03:50:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:50:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:50:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2023-01-28 03:50:09,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40290806754221387 [2023-01-28 03:50:09,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2023-01-28 03:50:09,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2023-01-28 03:50:09,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:09,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2023-01-28 03:50:09,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 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 03:50:09,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 03:50:09,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 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 03:50:09,732 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 114 flow. Second operand 4 states and 859 transitions. [2023-01-28 03:50:09,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 311 flow [2023-01-28 03:50:09,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 295 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:09,737 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 122 flow [2023-01-28 03:50:09,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-01-28 03:50:09,739 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-01-28 03:50:09,739 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 122 flow [2023-01-28 03:50:09,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 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 03:50:09,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:09,740 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 03:50:09,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 03:50:09,741 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 03:50:09,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash -451165947, now seen corresponding path program 1 times [2023-01-28 03:50:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:09,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243473613] [2023-01-28 03:50:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:09,962 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 03:50:09,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:09,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243473613] [2023-01-28 03:50:09,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243473613] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:09,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:09,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 03:50:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840631001] [2023-01-28 03:50:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:50:09,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 533 [2023-01-28 03:50:09,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 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 03:50:09,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:09,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 533 [2023-01-28 03:50:09,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:10,192 INFO L130 PetriNetUnfolder]: 1394/1946 cut-off events. [2023-01-28 03:50:10,193 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2023-01-28 03:50:10,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 1946 events. 1394/1946 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6914 event pairs, 493 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 4913. Up to 1006 conditions per place. [2023-01-28 03:50:10,204 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 55 selfloop transitions, 2 changer transitions 6/63 dead transitions. [2023-01-28 03:50:10,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 321 flow [2023-01-28 03:50:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-01-28 03:50:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734208880550344 [2023-01-28 03:50:10,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-01-28 03:50:10,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-01-28 03:50:10,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:10,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-01-28 03:50:10,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 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 03:50:10,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:10,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:10,213 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 122 flow. Second operand 3 states and 757 transitions. [2023-01-28 03:50:10,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 321 flow [2023-01-28 03:50:10,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:10,216 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 132 flow [2023-01-28 03:50:10,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-01-28 03:50:10,218 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-01-28 03:50:10,218 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 132 flow [2023-01-28 03:50:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 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 03:50:10,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:10,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:10,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 03:50:10,219 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 03:50:10,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash -4226639, now seen corresponding path program 1 times [2023-01-28 03:50:10,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:10,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508611238] [2023-01-28 03:50:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:10,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508611238] [2023-01-28 03:50:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508611238] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:10,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:10,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:50:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25034091] [2023-01-28 03:50:10,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:10,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:10,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:10,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:50:10,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 533 [2023-01-28 03:50:10,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 03:50:10,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:10,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 533 [2023-01-28 03:50:10,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:10,518 INFO L130 PetriNetUnfolder]: 1590/2226 cut-off events. [2023-01-28 03:50:10,518 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2023-01-28 03:50:10,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2226 events. 1590/2226 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8480 event pairs, 467 based on Foata normal form. 0/1703 useless extension candidates. Maximal degree in co-relation 5801. Up to 1288 conditions per place. [2023-01-28 03:50:10,533 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 51 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-01-28 03:50:10,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 282 flow [2023-01-28 03:50:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2023-01-28 03:50:10,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46091307066916826 [2023-01-28 03:50:10,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2023-01-28 03:50:10,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2023-01-28 03:50:10,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:10,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2023-01-28 03:50:10,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 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 03:50:10,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:10,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:10,542 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 132 flow. Second operand 3 states and 737 transitions. [2023-01-28 03:50:10,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 282 flow [2023-01-28 03:50:10,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:10,546 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 146 flow [2023-01-28 03:50:10,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-01-28 03:50:10,549 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-01-28 03:50:10,549 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 146 flow [2023-01-28 03:50:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 03:50:10,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:10,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:10,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 03:50:10,550 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 03:50:10,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:10,550 INFO L85 PathProgramCache]: Analyzing trace with hash 950240521, now seen corresponding path program 1 times [2023-01-28 03:50:10,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:10,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729806650] [2023-01-28 03:50:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:10,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:10,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:10,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729806650] [2023-01-28 03:50:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729806650] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:50:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241189517] [2023-01-28 03:50:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:10,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:50:10,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 533 [2023-01-28 03:50:10,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 03:50:10,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:10,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 533 [2023-01-28 03:50:10,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:10,970 INFO L130 PetriNetUnfolder]: 2252/3132 cut-off events. [2023-01-28 03:50:10,971 INFO L131 PetriNetUnfolder]: For 1970/1970 co-relation queries the response was YES. [2023-01-28 03:50:10,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8762 conditions, 3132 events. 2252/3132 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12337 event pairs, 887 based on Foata normal form. 0/2503 useless extension candidates. Maximal degree in co-relation 8750. Up to 2073 conditions per place. [2023-01-28 03:50:10,984 INFO L137 encePairwiseOnDemand]: 528/533 looper letters, 48 selfloop transitions, 4 changer transitions 6/58 dead transitions. [2023-01-28 03:50:10,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 324 flow [2023-01-28 03:50:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-01-28 03:50:10,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442151344590369 [2023-01-28 03:50:10,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-01-28 03:50:10,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-01-28 03:50:10,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:10,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-01-28 03:50:10,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 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 03:50:10,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:10,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:10,991 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 146 flow. Second operand 3 states and 707 transitions. [2023-01-28 03:50:10,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 324 flow [2023-01-28 03:50:10,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:10,995 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 176 flow [2023-01-28 03:50:10,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-01-28 03:50:10,996 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-01-28 03:50:10,996 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 176 flow [2023-01-28 03:50:10,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 03:50:10,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:10,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:10,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 03:50:10,997 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 03:50:10,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 898013115, now seen corresponding path program 2 times [2023-01-28 03:50:10,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:10,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994309993] [2023-01-28 03:50:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:10,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:11,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:11,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994309993] [2023-01-28 03:50:11,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994309993] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:11,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:11,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:50:11,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440424335] [2023-01-28 03:50:11,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:11,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:50:11,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:50:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:50:11,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 533 [2023-01-28 03:50:11,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 03:50:11,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:11,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 533 [2023-01-28 03:50:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:11,651 INFO L130 PetriNetUnfolder]: 2852/3948 cut-off events. [2023-01-28 03:50:11,652 INFO L131 PetriNetUnfolder]: For 2542/2542 co-relation queries the response was YES. [2023-01-28 03:50:11,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 3948 events. 2852/3948 cut-off events. For 2542/2542 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16060 event pairs, 1079 based on Foata normal form. 72/3217 useless extension candidates. Maximal degree in co-relation 11822. Up to 2045 conditions per place. [2023-01-28 03:50:11,670 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 40 selfloop transitions, 5 changer transitions 15/60 dead transitions. [2023-01-28 03:50:11,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 362 flow [2023-01-28 03:50:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:50:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:50:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-01-28 03:50:11,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045028142589118 [2023-01-28 03:50:11,674 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-01-28 03:50:11,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-01-28 03:50:11,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:11,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-01-28 03:50:11,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 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 03:50:11,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 03:50:11,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 03:50:11,681 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 176 flow. Second operand 5 states and 1078 transitions. [2023-01-28 03:50:11,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 362 flow [2023-01-28 03:50:11,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:11,687 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 175 flow [2023-01-28 03:50:11,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-01-28 03:50:11,689 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2023-01-28 03:50:11,689 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 175 flow [2023-01-28 03:50:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 03:50:11,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:11,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 03:50:11,690 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 03:50:11,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1169813069, now seen corresponding path program 3 times [2023-01-28 03:50:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:11,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654059128] [2023-01-28 03:50:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:12,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:12,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654059128] [2023-01-28 03:50:12,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654059128] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966111988] [2023-01-28 03:50:12,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:50:12,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:12,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:12,020 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 03:50:12,031 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 03:50:12,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:50:12,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:12,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:50:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:12,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 03:50:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966111988] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:12,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 03:50:12,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-28 03:50:12,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019881351] [2023-01-28 03:50:12,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:12,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 03:50:12,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 533 [2023-01-28 03:50:12,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 03:50:12,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:12,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 533 [2023-01-28 03:50:12,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:12,725 INFO L130 PetriNetUnfolder]: 2797/3939 cut-off events. [2023-01-28 03:50:12,725 INFO L131 PetriNetUnfolder]: For 2929/2929 co-relation queries the response was YES. [2023-01-28 03:50:12,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11868 conditions, 3939 events. 2797/3939 cut-off events. For 2929/2929 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16608 event pairs, 911 based on Foata normal form. 140/3324 useless extension candidates. Maximal degree in co-relation 11854. Up to 2998 conditions per place. [2023-01-28 03:50:12,739 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 60 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-01-28 03:50:12,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 398 flow [2023-01-28 03:50:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-01-28 03:50:12,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627892432770482 [2023-01-28 03:50:12,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-01-28 03:50:12,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-01-28 03:50:12,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:12,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-01-28 03:50:12,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 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 03:50:12,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:12,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:12,748 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 175 flow. Second operand 3 states and 740 transitions. [2023-01-28 03:50:12,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 398 flow [2023-01-28 03:50:12,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 379 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-28 03:50:12,753 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 180 flow [2023-01-28 03:50:12,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-01-28 03:50:12,754 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2023-01-28 03:50:12,754 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 180 flow [2023-01-28 03:50:12,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 03:50:12,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:12,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:12,765 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 03:50:12,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:12,965 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 03:50:12,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash 279207723, now seen corresponding path program 4 times [2023-01-28 03:50:12,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:12,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326788619] [2023-01-28 03:50:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:12,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:13,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326788619] [2023-01-28 03:50:13,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326788619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597690193] [2023-01-28 03:50:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:50:13,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:13,171 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 03:50:13,196 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 03:50:13,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:50:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:50:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:13,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 03:50:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597690193] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:13,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 03:50:13,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-28 03:50:13,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988751404] [2023-01-28 03:50:13,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:13,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:13,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 03:50:13,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 533 [2023-01-28 03:50:13,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:13,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:13,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 533 [2023-01-28 03:50:13,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:13,749 INFO L130 PetriNetUnfolder]: 2840/4022 cut-off events. [2023-01-28 03:50:13,749 INFO L131 PetriNetUnfolder]: For 3815/3815 co-relation queries the response was YES. [2023-01-28 03:50:13,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 4022 events. 2840/4022 cut-off events. For 3815/3815 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16641 event pairs, 884 based on Foata normal form. 176/3507 useless extension candidates. Maximal degree in co-relation 12376. Up to 2410 conditions per place. [2023-01-28 03:50:13,764 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 56 selfloop transitions, 3 changer transitions 4/63 dead transitions. [2023-01-28 03:50:13,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 396 flow [2023-01-28 03:50:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-01-28 03:50:13,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659161976235147 [2023-01-28 03:50:13,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-01-28 03:50:13,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-01-28 03:50:13,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:13,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-01-28 03:50:13,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 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 03:50:13,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:13,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 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 03:50:13,771 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 180 flow. Second operand 3 states and 745 transitions. [2023-01-28 03:50:13,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 396 flow [2023-01-28 03:50:13,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:13,775 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 201 flow [2023-01-28 03:50:13,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-01-28 03:50:13,776 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-01-28 03:50:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 201 flow [2023-01-28 03:50:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:13,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:13,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:13,783 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 03:50:13,983 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,SelfDestructingSolverStorable9 [2023-01-28 03:50:13,983 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 03:50:13,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1250184703, now seen corresponding path program 5 times [2023-01-28 03:50:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:13,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108818175] [2023-01-28 03:50:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:14,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:14,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108818175] [2023-01-28 03:50:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108818175] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:14,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:50:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506527136] [2023-01-28 03:50:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:50:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:50:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:50:14,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 533 [2023-01-28 03:50:14,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 03:50:14,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:14,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 533 [2023-01-28 03:50:14,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:14,602 INFO L130 PetriNetUnfolder]: 2728/3862 cut-off events. [2023-01-28 03:50:14,603 INFO L131 PetriNetUnfolder]: For 3991/3991 co-relation queries the response was YES. [2023-01-28 03:50:14,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12763 conditions, 3862 events. 2728/3862 cut-off events. For 3991/3991 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16677 event pairs, 878 based on Foata normal form. 20/3203 useless extension candidates. Maximal degree in co-relation 12748. Up to 2227 conditions per place. [2023-01-28 03:50:14,618 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 49 selfloop transitions, 5 changer transitions 8/62 dead transitions. [2023-01-28 03:50:14,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 408 flow [2023-01-28 03:50:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:50:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:50:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1075 transitions. [2023-01-28 03:50:14,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337711069418386 [2023-01-28 03:50:14,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1075 transitions. [2023-01-28 03:50:14,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1075 transitions. [2023-01-28 03:50:14,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:14,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1075 transitions. [2023-01-28 03:50:14,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 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 03:50:14,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 03:50:14,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 533.0) internal successors, (3198), 6 states have internal predecessors, (3198), 0 states have call successors, (0), 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 03:50:14,628 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 201 flow. Second operand 5 states and 1075 transitions. [2023-01-28 03:50:14,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 408 flow [2023-01-28 03:50:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 383 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:14,635 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 203 flow [2023-01-28 03:50:14,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-01-28 03:50:14,635 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2023-01-28 03:50:14,635 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 203 flow [2023-01-28 03:50:14,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 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 03:50:14,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:14,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:14,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 03:50:14,636 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 03:50:14,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 928404999, now seen corresponding path program 6 times [2023-01-28 03:50:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:14,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041708306] [2023-01-28 03:50:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041708306] [2023-01-28 03:50:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041708306] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848063320] [2023-01-28 03:50:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:50:14,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:14,889 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 03:50:14,892 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 03:50:15,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:50:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:50:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:15,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-01-28 03:50:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:15,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:15,281 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 03:50:15,281 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 23 treesize of output 10 [2023-01-28 03:50:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:15,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848063320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:15,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:15,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 03:50:15,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12869498] [2023-01-28 03:50:15,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:50:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:50:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:50:15,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 533 [2023-01-28 03:50:15,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 203 flow. Second operand has 11 states, 11 states have (on average 201.9090909090909) internal successors, (2221), 11 states have internal predecessors, (2221), 0 states have call successors, (0), 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 03:50:15,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:15,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 533 [2023-01-28 03:50:15,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:15,819 INFO L130 PetriNetUnfolder]: 1956/2781 cut-off events. [2023-01-28 03:50:15,820 INFO L131 PetriNetUnfolder]: For 3631/3631 co-relation queries the response was YES. [2023-01-28 03:50:15,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8912 conditions, 2781 events. 1956/2781 cut-off events. For 3631/3631 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11034 event pairs, 342 based on Foata normal form. 122/2442 useless extension candidates. Maximal degree in co-relation 8897. Up to 962 conditions per place. [2023-01-28 03:50:15,828 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 0 selfloop transitions, 0 changer transitions 99/99 dead transitions. [2023-01-28 03:50:15,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 694 flow [2023-01-28 03:50:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 03:50:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 03:50:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2243 transitions. [2023-01-28 03:50:15,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825686508613338 [2023-01-28 03:50:15,835 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2243 transitions. [2023-01-28 03:50:15,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2243 transitions. [2023-01-28 03:50:15,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:15,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2243 transitions. [2023-01-28 03:50:15,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.9090909090909) internal successors, (2243), 11 states have internal predecessors, (2243), 0 states have call successors, (0), 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 03:50:15,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 533.0) internal successors, (6396), 12 states have internal predecessors, (6396), 0 states have call successors, (0), 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 03:50:15,860 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 533.0) internal successors, (6396), 12 states have internal predecessors, (6396), 0 states have call successors, (0), 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 03:50:15,860 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 203 flow. Second operand 11 states and 2243 transitions. [2023-01-28 03:50:15,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 694 flow [2023-01-28 03:50:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 619 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-01-28 03:50:15,864 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-01-28 03:50:15,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-01-28 03:50:15,864 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-01-28 03:50:15,864 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-01-28 03:50:15,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 201.9090909090909) internal successors, (2221), 11 states have internal predecessors, (2221), 0 states have call successors, (0), 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 03:50:15,868 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 03:50:15,868 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 03:50:15,868 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 03:50:15,868 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 03:50:15,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:16,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:16,075 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:16,078 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 03:50:16,078 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 03:50:16,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:50:16 BasicIcfg [2023-01-28 03:50:16,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 03:50:16,081 INFO L158 Benchmark]: Toolchain (without parser) took 17470.11ms. Allocated memory was 325.1MB in the beginning and 757.1MB in the end (delta: 432.0MB). Free memory was 270.5MB in the beginning and 600.3MB in the end (delta: -329.7MB). Peak memory consumption was 312.5MB. Max. memory is 16.0GB. [2023-01-28 03:50:16,081 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 03:50:16,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.19ms. Allocated memory is still 325.1MB. Free memory was 270.3MB in the beginning and 301.6MB in the end (delta: -31.3MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. [2023-01-28 03:50:16,082 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.06ms. Allocated memory is still 325.1MB. Free memory was 301.6MB in the beginning and 298.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 03:50:16,082 INFO L158 Benchmark]: Boogie Preprocessor took 38.51ms. Allocated memory is still 325.1MB. Free memory was 298.9MB in the beginning and 296.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 03:50:16,082 INFO L158 Benchmark]: RCFGBuilder took 720.56ms. Allocated memory is still 325.1MB. Free memory was 296.8MB in the beginning and 254.9MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.0GB. [2023-01-28 03:50:16,083 INFO L158 Benchmark]: TraceAbstraction took 16420.02ms. Allocated memory was 325.1MB in the beginning and 757.1MB in the end (delta: 432.0MB). Free memory was 254.3MB in the beginning and 600.3MB in the end (delta: -345.9MB). Peak memory consumption was 294.2MB. Max. memory is 16.0GB. [2023-01-28 03:50:16,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 236.19ms. Allocated memory is still 325.1MB. Free memory was 270.3MB in the beginning and 301.6MB in the end (delta: -31.3MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.06ms. Allocated memory is still 325.1MB. Free memory was 301.6MB in the beginning and 298.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.51ms. Allocated memory is still 325.1MB. Free memory was 298.9MB in the beginning and 296.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 720.56ms. Allocated memory is still 325.1MB. Free memory was 296.8MB in the beginning and 254.9MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.0GB. * TraceAbstraction took 16420.02ms. Allocated memory was 325.1MB in the beginning and 757.1MB in the end (delta: 432.0MB). Free memory was 254.3MB in the beginning and 600.3MB in the end (delta: -345.9MB). Peak memory consumption was 294.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.8s, 238 PlacesBefore, 37 PlacesAfterwards, 253 TransitionsBefore, 37 TransitionsAfterwards, 2820 CoEnabledTransitionPairs, 8 FixpointIterations, 159 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 35 TrivialYvCompositions, 14 ConcurrentYvCompositions, 15 ChoiceCompositions, 267 TotalNumberOfCompositions, 5537 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4134, independent: 3984, independent conditional: 0, independent unconditional: 3984, dependent: 150, dependent conditional: 0, dependent unconditional: 150, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1717, independent: 1685, independent conditional: 0, independent unconditional: 1685, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4134, independent: 2299, independent conditional: 0, independent unconditional: 2299, dependent: 118, dependent conditional: 0, dependent unconditional: 118, unknown: 1717, unknown conditional: 0, unknown unconditional: 1717] , Statistics on independence cache: Total cache size (in pairs): 157, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 156]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 287 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.3s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 304 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 304 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1242 IncrementalHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 0 mSDtfsCounter, 1242 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=11, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 451 NumberOfCodeBlocks, 444 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 468 ConstructedInterpolants, 0 QuantifiedInterpolants, 1566 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1210 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 16 InterpolantComputations, 11 PerfectInterpolantSequences, 72/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-28 03:50:16,106 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 Received shutdown request...