/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-counter-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:45:04,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:45:04,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:45:05,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:45:05,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:45:05,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:45:05,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:45:05,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:45:05,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:45:05,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:45:05,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:45:05,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:45:05,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:45:05,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:45:05,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:45:05,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:45:05,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:45:05,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:45:05,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:45:05,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:45:05,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:45:05,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:45:05,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:45:05,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:45:05,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 03:45:05,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 03:45:05,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 03:45:05,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 03:45:05,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 03:45:05,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 03:45:05,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:45:05,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:45:05,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:45:05,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:45:05,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:45:05,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:45:05,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:45:05,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:45:05,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:45:05,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:45:05,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:45:05,056 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 03:45:05,081 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:45:05,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:45:05,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:45:05,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:45:05,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:45:05,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:45:05,084 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:45:05,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:45:05,084 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:45:05,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:45:05,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:45:05,086 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:45:05,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:45:05,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:45:05,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:45:05,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:45:05,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:45:05,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:45:05,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:45:05,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:45:05,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:45:05,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:45:05,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:45:05,087 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:45:05,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:45:05,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:45:05,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:45:05,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:45:05,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:45:05,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:45:05,344 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:45:05,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-01-28 03:45:06,354 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:45:06,594 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:45:06,594 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-01-28 03:45:06,599 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa817b42/aa99de80bdd949f0ac783fa6a000c525/FLAG568135286 [2023-01-28 03:45:06,614 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa817b42/aa99de80bdd949f0ac783fa6a000c525 [2023-01-28 03:45:06,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:45:06,618 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:45:06,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:45:06,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:45:06,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:45:06,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8227c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06, skipping insertion in model container [2023-01-28 03:45:06,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:45:06,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:45:06,798 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-counter-queue.wvr.c[2428,2441] [2023-01-28 03:45:06,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:45:06,821 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:45:06,836 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-counter-queue.wvr.c[2428,2441] [2023-01-28 03:45:06,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:45:06,849 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:45:06,849 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:45:06,855 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:45:06,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06 WrapperNode [2023-01-28 03:45:06,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:45:06,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:45:06,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:45:06,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:45:06,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,888 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 146 [2023-01-28 03:45:06,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:45:06,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:45:06,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:45:06,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:45:06,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:45:06,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:45:06,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:45:06,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:45:06,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (1/1) ... [2023-01-28 03:45:06,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:45:06,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:06,953 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 03:45:06,958 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 03:45:06,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:45:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:45:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:45:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:45:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:45:07,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:45:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:45:07,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:45:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:45:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:45:07,003 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 03:45:07,156 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:45:07,157 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:45:07,448 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:45:07,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:45:07,562 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 03:45:07,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:45:07 BoogieIcfgContainer [2023-01-28 03:45:07,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:45:07,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:45:07,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:45:07,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:45:07,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:45:06" (1/3) ... [2023-01-28 03:45:07,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7109ff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:45:07, skipping insertion in model container [2023-01-28 03:45:07,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:06" (2/3) ... [2023-01-28 03:45:07,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7109ff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:45:07, skipping insertion in model container [2023-01-28 03:45:07,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:45:07" (3/3) ... [2023-01-28 03:45:07,570 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-01-28 03:45:07,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:45:07,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:45:07,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:45:07,647 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 03:45:07,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 238 flow [2023-01-28 03:45:07,711 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-01-28 03:45:07,712 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:45:07,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2023-01-28 03:45:07,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 111 transitions, 238 flow [2023-01-28 03:45:07,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 101 transitions, 214 flow [2023-01-28 03:45:07,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:45:07,744 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 101 transitions, 214 flow [2023-01-28 03:45:07,746 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 101 transitions, 214 flow [2023-01-28 03:45:07,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 101 transitions, 214 flow [2023-01-28 03:45:07,775 INFO L130 PetriNetUnfolder]: 9/101 cut-off events. [2023-01-28 03:45:07,775 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:45:07,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 9/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2023-01-28 03:45:07,777 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-01-28 03:45:11,146 INFO L134 LiptonReduction]: Checked pairs total: 830 [2023-01-28 03:45:11,146 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 03:45:11,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:45:11,162 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;@3d45fc9e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:45:11,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 03:45:11,169 INFO L130 PetriNetUnfolder]: 3/18 cut-off events. [2023-01-28 03:45:11,169 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:45:11,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:11,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:11,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:11,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash 41387086, now seen corresponding path program 1 times [2023-01-28 03:45:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554455001] [2023-01-28 03:45:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:11,566 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 03:45:11,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:11,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554455001] [2023-01-28 03:45:11,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554455001] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:45:11,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:45:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 03:45:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671235871] [2023-01-28 03:45:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:45:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:45:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:45:11,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 208 [2023-01-28 03:45:11,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 03:45:11,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:11,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 208 [2023-01-28 03:45:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:11,686 INFO L130 PetriNetUnfolder]: 114/197 cut-off events. [2023-01-28 03:45:11,686 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-01-28 03:45:11,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 197 events. 114/197 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 703 event pairs, 24 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 328. Up to 136 conditions per place. [2023-01-28 03:45:11,689 INFO L137 encePairwiseOnDemand]: 204/208 looper letters, 25 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-01-28 03:45:11,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 141 flow [2023-01-28 03:45:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:45:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:45:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-01-28 03:45:11,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-28 03:45:11,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-01-28 03:45:11,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-01-28 03:45:11,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:11,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-01-28 03:45:11,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 03:45:11,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 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 03:45:11,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 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 03:45:11,742 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 312 transitions. [2023-01-28 03:45:11,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 141 flow [2023-01-28 03:45:11,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 03:45:11,746 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 61 flow [2023-01-28 03:45:11,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-01-28 03:45:11,751 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-01-28 03:45:11,751 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 61 flow [2023-01-28 03:45:11,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 03:45:11,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:11,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:11,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:45:11,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:11,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash -370799563, now seen corresponding path program 1 times [2023-01-28 03:45:11,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:11,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542788943] [2023-01-28 03:45:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:11,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:11,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542788943] [2023-01-28 03:45:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542788943] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:45:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:45:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:45:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570512259] [2023-01-28 03:45:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:45:11,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 208 [2023-01-28 03:45:11,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 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 03:45:11,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:11,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 208 [2023-01-28 03:45:11,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:12,028 INFO L130 PetriNetUnfolder]: 178/329 cut-off events. [2023-01-28 03:45:12,028 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-01-28 03:45:12,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 329 events. 178/329 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1385 event pairs, 83 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 276. Up to 207 conditions per place. [2023-01-28 03:45:12,034 INFO L137 encePairwiseOnDemand]: 203/208 looper letters, 39 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-01-28 03:45:12,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 44 transitions, 210 flow [2023-01-28 03:45:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2023-01-28 03:45:12,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2023-01-28 03:45:12,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2023-01-28 03:45:12,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2023-01-28 03:45:12,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:12,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2023-01-28 03:45:12,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 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 03:45:12,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:12,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:12,047 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 61 flow. Second operand 5 states and 425 transitions. [2023-01-28 03:45:12,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 44 transitions, 210 flow [2023-01-28 03:45:12,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 44 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:45:12,049 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 86 flow [2023-01-28 03:45:12,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-01-28 03:45:12,050 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-01-28 03:45:12,050 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 86 flow [2023-01-28 03:45:12,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 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 03:45:12,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:12,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:12,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:45:12,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:12,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1378138269, now seen corresponding path program 1 times [2023-01-28 03:45:12,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:12,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786767563] [2023-01-28 03:45:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:12,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:12,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:12,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786767563] [2023-01-28 03:45:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786767563] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:45:12,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:45:12,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:45:12,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502674384] [2023-01-28 03:45:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:12,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:12,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:45:12,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 208 [2023-01-28 03:45:12,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 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 03:45:12,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:12,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 208 [2023-01-28 03:45:12,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:12,279 INFO L130 PetriNetUnfolder]: 132/246 cut-off events. [2023-01-28 03:45:12,280 INFO L131 PetriNetUnfolder]: For 50/57 co-relation queries the response was YES. [2023-01-28 03:45:12,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 246 events. 132/246 cut-off events. For 50/57 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 937 event pairs, 81 based on Foata normal form. 7/234 useless extension candidates. Maximal degree in co-relation 482. Up to 205 conditions per place. [2023-01-28 03:45:12,283 INFO L137 encePairwiseOnDemand]: 203/208 looper letters, 19 selfloop transitions, 2 changer transitions 16/38 dead transitions. [2023-01-28 03:45:12,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 191 flow [2023-01-28 03:45:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 420 transitions. [2023-01-28 03:45:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2023-01-28 03:45:12,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 420 transitions. [2023-01-28 03:45:12,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 420 transitions. [2023-01-28 03:45:12,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:12,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 420 transitions. [2023-01-28 03:45:12,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 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 03:45:12,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:12,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:12,289 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 86 flow. Second operand 5 states and 420 transitions. [2023-01-28 03:45:12,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 191 flow [2023-01-28 03:45:12,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 187 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 03:45:12,292 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 78 flow [2023-01-28 03:45:12,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-01-28 03:45:12,293 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-01-28 03:45:12,296 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 78 flow [2023-01-28 03:45:12,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 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 03:45:12,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:12,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:12,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:45:12,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:12,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1007847617, now seen corresponding path program 1 times [2023-01-28 03:45:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:12,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994624248] [2023-01-28 03:45:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:12,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994624248] [2023-01-28 03:45:12,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994624248] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:12,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610214826] [2023-01-28 03:45:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:12,425 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 03:45:12,431 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 03:45:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:45:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:12,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610214826] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:12,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 03:45:12,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 03:45:12,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057582122] [2023-01-28 03:45:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:45:12,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 208 [2023-01-28 03:45:12,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 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 03:45:12,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:12,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 208 [2023-01-28 03:45:12,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:12,749 INFO L130 PetriNetUnfolder]: 117/205 cut-off events. [2023-01-28 03:45:12,749 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-01-28 03:45:12,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 205 events. 117/205 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 696 event pairs, 35 based on Foata normal form. 16/220 useless extension candidates. Maximal degree in co-relation 522. Up to 112 conditions per place. [2023-01-28 03:45:12,751 INFO L137 encePairwiseOnDemand]: 202/208 looper letters, 23 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-01-28 03:45:12,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 161 flow [2023-01-28 03:45:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-01-28 03:45:12,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39615384615384613 [2023-01-28 03:45:12,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-01-28 03:45:12,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-01-28 03:45:12,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:12,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-01-28 03:45:12,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 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 03:45:12,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:12,759 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:12,759 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 78 flow. Second operand 5 states and 412 transitions. [2023-01-28 03:45:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 161 flow [2023-01-28 03:45:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 143 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-01-28 03:45:12,761 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 91 flow [2023-01-28 03:45:12,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-01-28 03:45:12,763 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-01-28 03:45:12,763 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 91 flow [2023-01-28 03:45:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 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 03:45:12,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:12,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:12,773 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 03:45:12,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:12,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:12,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 53783691, now seen corresponding path program 1 times [2023-01-28 03:45:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532305986] [2023-01-28 03:45:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:13,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:13,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532305986] [2023-01-28 03:45:13,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532305986] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:13,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489438874] [2023-01-28 03:45:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:13,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:13,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:13,042 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 03:45:13,044 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 03:45:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:45:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:13,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:13,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489438874] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:13,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 03:45:13,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 03:45:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531250317] [2023-01-28 03:45:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:13,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:13,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:45:13,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 208 [2023-01-28 03:45:13,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 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 03:45:13,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:13,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 208 [2023-01-28 03:45:13,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:13,236 INFO L130 PetriNetUnfolder]: 94/169 cut-off events. [2023-01-28 03:45:13,236 INFO L131 PetriNetUnfolder]: For 123/141 co-relation queries the response was YES. [2023-01-28 03:45:13,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 169 events. 94/169 cut-off events. For 123/141 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 514 event pairs, 30 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 459. Up to 93 conditions per place. [2023-01-28 03:45:13,237 INFO L137 encePairwiseOnDemand]: 202/208 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-01-28 03:45:13,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 192 flow [2023-01-28 03:45:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-01-28 03:45:13,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39615384615384613 [2023-01-28 03:45:13,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-01-28 03:45:13,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-01-28 03:45:13,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:13,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-01-28 03:45:13,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 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 03:45:13,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:13,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 03:45:13,243 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 91 flow. Second operand 5 states and 412 transitions. [2023-01-28 03:45:13,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 192 flow [2023-01-28 03:45:13,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 03:45:13,244 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 111 flow [2023-01-28 03:45:13,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-01-28 03:45:13,245 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2023-01-28 03:45:13,245 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 111 flow [2023-01-28 03:45:13,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 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 03:45:13,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:13,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:13,253 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 03:45:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:13,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:13,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1841708852, now seen corresponding path program 1 times [2023-01-28 03:45:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:13,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530374501] [2023-01-28 03:45:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:14,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530374501] [2023-01-28 03:45:14,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530374501] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458058415] [2023-01-28 03:45:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:14,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:14,118 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 03:45:14,120 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 03:45:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 03:45:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:14,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:45:14,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:45:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:45:14,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 03:45:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:14,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:14,698 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) .cse0)) (forall ((v_ArrVal_133 (Array Int Int))) (<= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-01-28 03:45:14,712 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~counter~0))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) .cse0)) (forall ((v_ArrVal_133 (Array Int Int))) (<= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-01-28 03:45:14,734 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-01-28 03:45:14,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:14,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-01-28 03:45:14,758 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 286 treesize of output 254 [2023-01-28 03:45:14,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-01-28 03:45:14,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-01-28 03:45:14,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:14,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-01-28 03:45:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:14,803 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 58 treesize of output 50 [2023-01-28 03:45:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 03:45:14,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458058415] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:14,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:14,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-01-28 03:45:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192146765] [2023-01-28 03:45:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:14,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 03:45:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 03:45:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=467, Unknown=9, NotChecked=138, Total=702 [2023-01-28 03:45:14,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 208 [2023-01-28 03:45:14,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 111 flow. Second operand has 27 states, 27 states have (on average 61.55555555555556) internal successors, (1662), 27 states have internal predecessors, (1662), 0 states have call successors, (0), 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 03:45:14,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:14,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 208 [2023-01-28 03:45:14,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:15,729 INFO L130 PetriNetUnfolder]: 329/582 cut-off events. [2023-01-28 03:45:15,729 INFO L131 PetriNetUnfolder]: For 526/526 co-relation queries the response was YES. [2023-01-28 03:45:15,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 582 events. 329/582 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2347 event pairs, 12 based on Foata normal form. 2/583 useless extension candidates. Maximal degree in co-relation 1898. Up to 188 conditions per place. [2023-01-28 03:45:15,733 INFO L137 encePairwiseOnDemand]: 199/208 looper letters, 113 selfloop transitions, 38 changer transitions 2/153 dead transitions. [2023-01-28 03:45:15,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 153 transitions, 950 flow [2023-01-28 03:45:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 03:45:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 03:45:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1471 transitions. [2023-01-28 03:45:15,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3214597902097902 [2023-01-28 03:45:15,738 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1471 transitions. [2023-01-28 03:45:15,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1471 transitions. [2023-01-28 03:45:15,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:15,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1471 transitions. [2023-01-28 03:45:15,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.86363636363636) internal successors, (1471), 22 states have internal predecessors, (1471), 0 states have call successors, (0), 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 03:45:15,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 208.0) internal successors, (4784), 23 states have internal predecessors, (4784), 0 states have call successors, (0), 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 03:45:15,750 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 208.0) internal successors, (4784), 23 states have internal predecessors, (4784), 0 states have call successors, (0), 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 03:45:15,750 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 111 flow. Second operand 22 states and 1471 transitions. [2023-01-28 03:45:15,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 153 transitions, 950 flow [2023-01-28 03:45:15,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 153 transitions, 922 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 03:45:15,756 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 512 flow [2023-01-28 03:45:15,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=512, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-01-28 03:45:15,759 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 37 predicate places. [2023-01-28 03:45:15,759 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 512 flow [2023-01-28 03:45:15,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 61.55555555555556) internal successors, (1662), 27 states have internal predecessors, (1662), 0 states have call successors, (0), 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 03:45:15,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:15,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:15,772 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 03:45:15,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:15,968 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:15,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 269516194, now seen corresponding path program 2 times [2023-01-28 03:45:15,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:15,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146080465] [2023-01-28 03:45:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 03:45:16,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 03:45:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 03:45:16,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 03:45:16,066 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 03:45:16,067 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 03:45:16,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 03:45:16,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 03:45:16,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 03:45:16,069 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-01-28 03:45:16,074 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 03:45:16,074 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 03:45:16,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:45:16 BasicIcfg [2023-01-28 03:45:16,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 03:45:16,118 INFO L158 Benchmark]: Toolchain (without parser) took 9499.17ms. Allocated memory was 341.8MB in the beginning and 467.7MB in the end (delta: 125.8MB). Free memory was 301.8MB in the beginning and 377.3MB in the end (delta: -75.5MB). Peak memory consumption was 53.5MB. Max. memory is 16.0GB. [2023-01-28 03:45:16,118 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory was 290.6MB in the beginning and 290.3MB in the end (delta: 237.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 03:45:16,118 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.03ms. Allocated memory is still 341.8MB. Free memory was 301.8MB in the beginning and 290.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 03:45:16,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.27ms. Allocated memory is still 341.8MB. Free memory was 290.1MB in the beginning and 288.0MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 03:45:16,118 INFO L158 Benchmark]: Boogie Preprocessor took 35.64ms. Allocated memory is still 341.8MB. Free memory was 288.0MB in the beginning and 286.7MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-28 03:45:16,119 INFO L158 Benchmark]: RCFGBuilder took 639.03ms. Allocated memory is still 341.8MB. Free memory was 286.7MB in the beginning and 260.8MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 03:45:16,119 INFO L158 Benchmark]: TraceAbstraction took 8551.79ms. Allocated memory was 341.8MB in the beginning and 467.7MB in the end (delta: 125.8MB). Free memory was 260.0MB in the beginning and 377.3MB in the end (delta: -117.3MB). Peak memory consumption was 11.5MB. Max. memory is 16.0GB. [2023-01-28 03:45:16,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory was 290.6MB in the beginning and 290.3MB in the end (delta: 237.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 234.03ms. Allocated memory is still 341.8MB. Free memory was 301.8MB in the beginning and 290.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.27ms. Allocated memory is still 341.8MB. Free memory was 290.1MB in the beginning and 288.0MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 35.64ms. Allocated memory is still 341.8MB. Free memory was 288.0MB in the beginning and 286.7MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * RCFGBuilder took 639.03ms. Allocated memory is still 341.8MB. Free memory was 286.7MB in the beginning and 260.8MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 8551.79ms. Allocated memory was 341.8MB in the beginning and 467.7MB in the end (delta: 125.8MB). Free memory was 260.0MB in the beginning and 377.3MB in the end (delta: -117.3MB). Peak memory consumption was 11.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 99 PlacesBefore, 23 PlacesAfterwards, 101 TransitionsBefore, 19 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 57 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 830 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 681, independent: 646, independent conditional: 0, independent unconditional: 646, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 299, independent: 291, independent conditional: 0, independent unconditional: 291, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 681, independent: 355, independent conditional: 0, independent unconditional: 355, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 299, unknown conditional: 0, unknown unconditional: 299] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, N=1, counter=0, pthread_create(&t1, 0, thread1, 0)=-2, t1={5:0}, t2={6:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, N=1, counter=0, pthread_create(&t2, 0, thread2, 0)=-1, t1={5:0}, t2={6:0}] [L83] 0 \read(t1) VAL [A={3:0}, N=1, \read(t1)=-2, counter=0, t1={5:0}, t2={6:0}] [L62] 2 int i=0; VAL [A={3:0}, N=1, counter=0, i=0] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L49] 1 int i=0; VAL [A={3:0}, N=1, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp [L49] 1 i++ VAL [A={3:0}, N=1, counter=-4, i=1, tmp=-4] [L49] COND FALSE 1 !(i