/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 AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:28:55,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:28:55,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:28:55,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:28:55,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:28:55,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:28:55,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:28:55,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:28:55,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:28:55,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:28:55,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:28:55,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:28:55,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:28:55,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:28:55,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:28:55,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:28:55,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:28:55,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:28:55,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:28:55,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:28:55,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:28:55,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:28:55,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:28:55,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:28:55,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:28:55,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:28:55,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:28:55,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:28:55,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:28:55,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:28:55,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:28:55,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:28:55,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:28:55,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:28:55,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:28:55,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:28:55,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:28:55,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:28:55,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:28:55,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:28:55,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:28:55,384 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 10:28:55,397 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:28:55,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:28:55,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:28:55,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:28:55,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:28:55,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:28:55,398 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:28:55,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:28:55,398 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:28:55,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:28:55,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:28:55,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:28:55,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:28:55,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:28:55,401 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:28:55,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:28:55,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:28:55,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:28:55,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:28:55,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:28:55,559 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:28:55,560 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:28:55,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-01-28 10:28:56,699 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:28:56,934 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:28:56,934 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-01-28 10:28:56,940 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132a30a8b/271f353773c14c34a5f09910df5d97cc/FLAG74d4da85b [2023-01-28 10:28:56,952 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132a30a8b/271f353773c14c34a5f09910df5d97cc [2023-01-28 10:28:56,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:28:56,954 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:28:56,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:28:56,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:28:56,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:28:56,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:28:56" (1/1) ... [2023-01-28 10:28:56,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d09708c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:56, skipping insertion in model container [2023-01-28 10:28:56,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:28:56" (1/1) ... [2023-01-28 10:28:56,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:28:56,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:28:57,106 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-figure1-alt.wvr.c[2087,2100] [2023-01-28 10:28:57,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:28:57,115 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:28:57,129 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-figure1-alt.wvr.c[2087,2100] [2023-01-28 10:28:57,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:28:57,134 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:28:57,136 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:28:57,140 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:28:57,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57 WrapperNode [2023-01-28 10:28:57,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:28:57,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:28:57,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:28:57,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:28:57,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,167 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-01-28 10:28:57,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:28:57,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:28:57,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:28:57,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:28:57,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:28:57,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:28:57,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:28:57,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:28:57,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (1/1) ... [2023-01-28 10:28:57,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:28:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:28:57,206 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 10:28:57,210 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 10:28:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:28:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:28:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:28:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:28:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:28:57,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:28:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:28:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:28:57,235 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 10:28:57,346 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:28:57,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:28:57,517 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:28:57,546 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:28:57,547 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 10:28:57,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:28:57 BoogieIcfgContainer [2023-01-28 10:28:57,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:28:57,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:28:57,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:28:57,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:28:57,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:28:56" (1/3) ... [2023-01-28 10:28:57,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e50be7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:28:57, skipping insertion in model container [2023-01-28 10:28:57,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:28:57" (2/3) ... [2023-01-28 10:28:57,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e50be7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:28:57, skipping insertion in model container [2023-01-28 10:28:57,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:28:57" (3/3) ... [2023-01-28 10:28:57,558 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-01-28 10:28:57,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:28:57,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:28:57,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:28:57,643 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 10:28:57,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-01-28 10:28:57,725 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-01-28 10:28:57,726 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:28:57,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-28 10:28:57,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-01-28 10:28:57,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-01-28 10:28:57,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:28:57,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-01-28 10:28:57,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-01-28 10:28:57,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-01-28 10:28:57,773 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-01-28 10:28:57,773 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:28:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-28 10:28:57,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 10:28:59,466 INFO L134 LiptonReduction]: Checked pairs total: 559 [2023-01-28 10:28:59,466 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-01-28 10:28:59,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:28:59,481 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;@4e47b100, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:28:59,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 10:28:59,485 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 10:28:59,485 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:28:59,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:28:59,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:28:59,486 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 10:28:59,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:28:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash -463799749, now seen corresponding path program 1 times [2023-01-28 10:28:59,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:28:59,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679481668] [2023-01-28 10:28:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:28:59,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:28:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:00,060 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 10:29:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679481668] [2023-01-28 10:29:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679481668] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:00,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:00,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:00,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433331104] [2023-01-28 10:29:00,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:00,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:00,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:00,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:00,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:00,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:00,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:00,246 INFO L130 PetriNetUnfolder]: 62/126 cut-off events. [2023-01-28 10:29:00,247 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-01-28 10:29:00,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 126 events. 62/126 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 14 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 200. Up to 63 conditions per place. [2023-01-28 10:29:00,249 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 32 selfloop transitions, 8 changer transitions 5/45 dead transitions. [2023-01-28 10:29:00,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 213 flow [2023-01-28 10:29:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2023-01-28 10:29:00,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412593984962406 [2023-01-28 10:29:00,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2023-01-28 10:29:00,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2023-01-28 10:29:00,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:00,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2023-01-28 10:29:00,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 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 10:29:00,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:00,285 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:00,286 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 439 transitions. [2023-01-28 10:29:00,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 213 flow [2023-01-28 10:29:00,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 10:29:00,290 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 89 flow [2023-01-28 10:29:00,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=89, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-01-28 10:29:00,294 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-01-28 10:29:00,294 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 89 flow [2023-01-28 10:29:00,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:00,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:00,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:29:00,296 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 10:29:00,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1560515861, now seen corresponding path program 2 times [2023-01-28 10:29:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:00,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830319090] [2023-01-28 10:29:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:00,521 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 10:29:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830319090] [2023-01-28 10:29:00,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830319090] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:00,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:00,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:00,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466127279] [2023-01-28 10:29:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:00,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:00,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:00,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:00,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:00,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:00,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:00,667 INFO L130 PetriNetUnfolder]: 63/131 cut-off events. [2023-01-28 10:29:00,668 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-01-28 10:29:00,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 131 events. 63/131 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 10 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 377. Up to 63 conditions per place. [2023-01-28 10:29:00,669 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 8 changer transitions 11/48 dead transitions. [2023-01-28 10:29:00,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 269 flow [2023-01-28 10:29:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 437 transitions. [2023-01-28 10:29:00,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-01-28 10:29:00,670 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 437 transitions. [2023-01-28 10:29:00,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 437 transitions. [2023-01-28 10:29:00,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:00,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 437 transitions. [2023-01-28 10:29:00,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.42857142857143) internal successors, (437), 7 states have internal predecessors, (437), 0 states have call successors, (0), 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 10:29:00,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:00,673 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:00,673 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 89 flow. Second operand 7 states and 437 transitions. [2023-01-28 10:29:00,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 269 flow [2023-01-28 10:29:00,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 263 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 10:29:00,675 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 121 flow [2023-01-28 10:29:00,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-01-28 10:29:00,676 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-01-28 10:29:00,676 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 121 flow [2023-01-28 10:29:00,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:00,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:00,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:00,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:29:00,676 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 10:29:00,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2054408487, now seen corresponding path program 3 times [2023-01-28 10:29:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:00,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258136745] [2023-01-28 10:29:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:00,847 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 10:29:00,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258136745] [2023-01-28 10:29:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258136745] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:00,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943924228] [2023-01-28 10:29:00,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:00,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:00,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:00,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:00,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:00,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:00,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:00,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:00,958 INFO L130 PetriNetUnfolder]: 66/144 cut-off events. [2023-01-28 10:29:00,958 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-01-28 10:29:00,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 144 events. 66/144 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 462 event pairs, 18 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 494. Up to 67 conditions per place. [2023-01-28 10:29:00,960 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 33 selfloop transitions, 11 changer transitions 8/52 dead transitions. [2023-01-28 10:29:00,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 337 flow [2023-01-28 10:29:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 442 transitions. [2023-01-28 10:29:00,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41541353383458646 [2023-01-28 10:29:00,961 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 442 transitions. [2023-01-28 10:29:00,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 442 transitions. [2023-01-28 10:29:00,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:00,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 442 transitions. [2023-01-28 10:29:00,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 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 10:29:00,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:00,964 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:00,965 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 121 flow. Second operand 7 states and 442 transitions. [2023-01-28 10:29:00,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 337 flow [2023-01-28 10:29:00,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 304 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-01-28 10:29:00,967 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 165 flow [2023-01-28 10:29:00,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-01-28 10:29:00,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-01-28 10:29:00,967 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 165 flow [2023-01-28 10:29:00,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:00,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:00,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:00,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:29:00,968 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 10:29:00,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 485360883, now seen corresponding path program 4 times [2023-01-28 10:29:00,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157198995] [2023-01-28 10:29:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:01,200 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 10:29:01,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157198995] [2023-01-28 10:29:01,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157198995] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:01,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:01,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:01,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456390248] [2023-01-28 10:29:01,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:01,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:01,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:01,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:01,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:01,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:01,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:01,314 INFO L130 PetriNetUnfolder]: 64/142 cut-off events. [2023-01-28 10:29:01,315 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-01-28 10:29:01,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 142 events. 64/142 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 464 event pairs, 12 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 506. Up to 67 conditions per place. [2023-01-28 10:29:01,316 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 36 selfloop transitions, 12 changer transitions 5/53 dead transitions. [2023-01-28 10:29:01,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 367 flow [2023-01-28 10:29:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2023-01-28 10:29:01,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-01-28 10:29:01,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2023-01-28 10:29:01,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2023-01-28 10:29:01,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:01,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2023-01-28 10:29:01,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 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 10:29:01,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:01,320 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:01,320 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 165 flow. Second operand 7 states and 441 transitions. [2023-01-28 10:29:01,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 367 flow [2023-01-28 10:29:01,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 350 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 10:29:01,322 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-01-28 10:29:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-01-28 10:29:01,323 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-01-28 10:29:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-01-28 10:29:01,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:01,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:01,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 10:29:01,323 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 10:29:01,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2091229915, now seen corresponding path program 5 times [2023-01-28 10:29:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:01,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396061911] [2023-01-28 10:29:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:01,463 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 10:29:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:01,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396061911] [2023-01-28 10:29:01,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396061911] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:01,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:01,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:01,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990067740] [2023-01-28 10:29:01,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:01,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:01,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:01,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:01,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:01,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:01,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:01,568 INFO L130 PetriNetUnfolder]: 63/135 cut-off events. [2023-01-28 10:29:01,568 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-01-28 10:29:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 135 events. 63/135 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 12 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 536. Up to 67 conditions per place. [2023-01-28 10:29:01,569 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 11 changer transitions 9/49 dead transitions. [2023-01-28 10:29:01,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 383 flow [2023-01-28 10:29:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 436 transitions. [2023-01-28 10:29:01,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40977443609022557 [2023-01-28 10:29:01,570 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 436 transitions. [2023-01-28 10:29:01,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 436 transitions. [2023-01-28 10:29:01,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:01,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 436 transitions. [2023-01-28 10:29:01,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 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 10:29:01,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:01,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:01,573 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 7 states and 436 transitions. [2023-01-28 10:29:01,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 383 flow [2023-01-28 10:29:01,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 10:29:01,575 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 232 flow [2023-01-28 10:29:01,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-01-28 10:29:01,576 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-01-28 10:29:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 232 flow [2023-01-28 10:29:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:01,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:01,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 10:29:01,576 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 10:29:01,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2082114117, now seen corresponding path program 6 times [2023-01-28 10:29:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686023737] [2023-01-28 10:29:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:01,743 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 10:29:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686023737] [2023-01-28 10:29:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686023737] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:01,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:01,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050328703] [2023-01-28 10:29:01,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:01,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:01,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:01,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:01,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:01,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:01,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:01,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:01,811 INFO L130 PetriNetUnfolder]: 59/121 cut-off events. [2023-01-28 10:29:01,811 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-01-28 10:29:01,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 121 events. 59/121 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 338 event pairs, 14 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 500. Up to 67 conditions per place. [2023-01-28 10:29:01,812 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 22 selfloop transitions, 11 changer transitions 12/45 dead transitions. [2023-01-28 10:29:01,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 379 flow [2023-01-28 10:29:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 432 transitions. [2023-01-28 10:29:01,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2023-01-28 10:29:01,815 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 432 transitions. [2023-01-28 10:29:01,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 432 transitions. [2023-01-28 10:29:01,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:01,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 432 transitions. [2023-01-28 10:29:01,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.714285714285715) internal successors, (432), 7 states have internal predecessors, (432), 0 states have call successors, (0), 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 10:29:01,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:01,817 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:01,817 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 232 flow. Second operand 7 states and 432 transitions. [2023-01-28 10:29:01,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 379 flow [2023-01-28 10:29:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 345 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-01-28 10:29:01,819 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 214 flow [2023-01-28 10:29:01,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-01-28 10:29:01,820 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-01-28 10:29:01,820 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 214 flow [2023-01-28 10:29:01,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 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 10:29:01,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:01,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 10:29:01,820 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 10:29:01,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:01,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2107689934, now seen corresponding path program 1 times [2023-01-28 10:29:01,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:01,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405315159] [2023-01-28 10:29:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:01,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:01,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405315159] [2023-01-28 10:29:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405315159] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18662436] [2023-01-28 10:29:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:01,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:01,998 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 10:29:02,012 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 10:29:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:02,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18662436] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:02,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:02,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032394984] [2023-01-28 10:29:02,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:02,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:02,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:02,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:02,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 214 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:02,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:02,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:02,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:03,065 INFO L130 PetriNetUnfolder]: 144/300 cut-off events. [2023-01-28 10:29:03,066 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-01-28 10:29:03,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 300 events. 144/300 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1256 event pairs, 4 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 911. Up to 89 conditions per place. [2023-01-28 10:29:03,068 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 70 selfloop transitions, 27 changer transitions 25/122 dead transitions. [2023-01-28 10:29:03,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 742 flow [2023-01-28 10:29:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:29:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:29:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1183 transitions. [2023-01-28 10:29:03,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962603878116344 [2023-01-28 10:29:03,071 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1183 transitions. [2023-01-28 10:29:03,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1183 transitions. [2023-01-28 10:29:03,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:03,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1183 transitions. [2023-01-28 10:29:03,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 62.26315789473684) internal successors, (1183), 19 states have internal predecessors, (1183), 0 states have call successors, (0), 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 10:29:03,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:03,076 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:03,076 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 214 flow. Second operand 19 states and 1183 transitions. [2023-01-28 10:29:03,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 742 flow [2023-01-28 10:29:03,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 122 transitions, 688 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-01-28 10:29:03,079 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 317 flow [2023-01-28 10:29:03,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-01-28 10:29:03,079 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-01-28 10:29:03,079 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 317 flow [2023-01-28 10:29:03,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:03,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:03,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:03,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 10:29:03,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:03,285 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:03,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash -635034376, now seen corresponding path program 2 times [2023-01-28 10:29:03,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:03,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241209445] [2023-01-28 10:29:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:03,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241209445] [2023-01-28 10:29:03,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241209445] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144973068] [2023-01-28 10:29:03,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:03,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:03,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:03,416 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 10:29:03,420 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 10:29:03,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:03,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:03,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:03,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:03,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:03,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144973068] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:03,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:03,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624388116] [2023-01-28 10:29:03,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:03,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:03,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:03,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 317 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:03,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:03,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:03,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:04,717 INFO L130 PetriNetUnfolder]: 189/426 cut-off events. [2023-01-28 10:29:04,718 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-01-28 10:29:04,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 426 events. 189/426 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2146 event pairs, 10 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 1603. Up to 123 conditions per place. [2023-01-28 10:29:04,721 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 107 selfloop transitions, 53 changer transitions 20/180 dead transitions. [2023-01-28 10:29:04,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 180 transitions, 1262 flow [2023-01-28 10:29:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 10:29:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 10:29:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1909 transitions. [2023-01-28 10:29:04,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051358234295416 [2023-01-28 10:29:04,725 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1909 transitions. [2023-01-28 10:29:04,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1909 transitions. [2023-01-28 10:29:04,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:04,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1909 transitions. [2023-01-28 10:29:04,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 61.58064516129032) internal successors, (1909), 31 states have internal predecessors, (1909), 0 states have call successors, (0), 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 10:29:04,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 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 10:29:04,734 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 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 10:29:04,734 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 317 flow. Second operand 31 states and 1909 transitions. [2023-01-28 10:29:04,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 180 transitions, 1262 flow [2023-01-28 10:29:04,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1092 flow, removed 76 selfloop flow, removed 7 redundant places. [2023-01-28 10:29:04,741 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 586 flow [2023-01-28 10:29:04,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=586, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2023-01-28 10:29:04,743 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-28 10:29:04,743 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 586 flow [2023-01-28 10:29:04,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:04,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:04,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:04,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 10:29:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-28 10:29:04,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:04,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash -708723856, now seen corresponding path program 3 times [2023-01-28 10:29:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:04,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948189637] [2023-01-28 10:29:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:05,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:05,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948189637] [2023-01-28 10:29:05,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948189637] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:05,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241184665] [2023-01-28 10:29:05,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:29:05,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:05,089 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 10:29:05,091 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 10:29:05,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:29:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:05,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:05,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241184665] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:05,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:05,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364044544] [2023-01-28 10:29:05,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:05,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:05,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 586 flow. Second operand has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 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 10:29:05,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:05,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:05,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:06,266 INFO L130 PetriNetUnfolder]: 185/397 cut-off events. [2023-01-28 10:29:06,266 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-01-28 10:29:06,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 397 events. 185/397 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1877 event pairs, 6 based on Foata normal form. 5/402 useless extension candidates. Maximal degree in co-relation 1807. Up to 119 conditions per place. [2023-01-28 10:29:06,269 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 82 selfloop transitions, 43 changer transitions 33/158 dead transitions. [2023-01-28 10:29:06,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1256 flow [2023-01-28 10:29:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 10:29:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 10:29:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1605 transitions. [2023-01-28 10:29:06,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061234817813765 [2023-01-28 10:29:06,273 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1605 transitions. [2023-01-28 10:29:06,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1605 transitions. [2023-01-28 10:29:06,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:06,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1605 transitions. [2023-01-28 10:29:06,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 61.73076923076923) internal successors, (1605), 26 states have internal predecessors, (1605), 0 states have call successors, (0), 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 10:29:06,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 0 states have call successors, (0), 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 10:29:06,280 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 0 states have call successors, (0), 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 10:29:06,280 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 586 flow. Second operand 26 states and 1605 transitions. [2023-01-28 10:29:06,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1256 flow [2023-01-28 10:29:06,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1137 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-01-28 10:29:06,287 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 564 flow [2023-01-28 10:29:06,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=564, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2023-01-28 10:29:06,288 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-01-28 10:29:06,288 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 564 flow [2023-01-28 10:29:06,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 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 10:29:06,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:06,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:06,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 10:29:06,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:06,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:06,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2082814152, now seen corresponding path program 4 times [2023-01-28 10:29:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:06,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993121568] [2023-01-28 10:29:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993121568] [2023-01-28 10:29:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993121568] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771764760] [2023-01-28 10:29:06,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:29:06,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:06,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:06,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:06,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 10:29:06,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:29:06,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:06,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771764760] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:06,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:06,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086994851] [2023-01-28 10:29:06,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:06,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:06,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:06,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 564 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:06,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:06,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:06,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:07,228 INFO L130 PetriNetUnfolder]: 168/351 cut-off events. [2023-01-28 10:29:07,228 INFO L131 PetriNetUnfolder]: For 1783/1783 co-relation queries the response was YES. [2023-01-28 10:29:07,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 351 events. 168/351 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 4 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1659. Up to 155 conditions per place. [2023-01-28 10:29:07,230 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 54 selfloop transitions, 38 changer transitions 10/102 dead transitions. [2023-01-28 10:29:07,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 102 transitions, 918 flow [2023-01-28 10:29:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:29:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:29:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 799 transitions. [2023-01-28 10:29:07,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043522267206478 [2023-01-28 10:29:07,232 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 799 transitions. [2023-01-28 10:29:07,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 799 transitions. [2023-01-28 10:29:07,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:07,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 799 transitions. [2023-01-28 10:29:07,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 61.46153846153846) internal successors, (799), 13 states have internal predecessors, (799), 0 states have call successors, (0), 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 10:29:07,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 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 10:29:07,237 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 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 10:29:07,237 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 564 flow. Second operand 13 states and 799 transitions. [2023-01-28 10:29:07,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 102 transitions, 918 flow [2023-01-28 10:29:07,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 801 flow, removed 16 selfloop flow, removed 19 redundant places. [2023-01-28 10:29:07,242 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 554 flow [2023-01-28 10:29:07,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2023-01-28 10:29:07,243 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-01-28 10:29:07,243 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 554 flow [2023-01-28 10:29:07,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:07,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:07,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:07,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:07,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:07,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash 992131436, now seen corresponding path program 5 times [2023-01-28 10:29:07,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:07,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027498303] [2023-01-28 10:29:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027498303] [2023-01-28 10:29:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027498303] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704271370] [2023-01-28 10:29:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:29:07,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:07,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:07,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 10:29:07,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:07,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:07,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:07,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:07,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704271370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:07,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652300905] [2023-01-28 10:29:07,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:07,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:07,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:07,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:07,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 554 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:07,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:07,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:07,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:08,135 INFO L130 PetriNetUnfolder]: 170/357 cut-off events. [2023-01-28 10:29:08,135 INFO L131 PetriNetUnfolder]: For 1289/1289 co-relation queries the response was YES. [2023-01-28 10:29:08,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 357 events. 170/357 cut-off events. For 1289/1289 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1548 event pairs, 5 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 1584. Up to 195 conditions per place. [2023-01-28 10:29:08,138 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 60 selfloop transitions, 27 changer transitions 10/97 dead transitions. [2023-01-28 10:29:08,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 866 flow [2023-01-28 10:29:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:29:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:29:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 671 transitions. [2023-01-28 10:29:08,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40131578947368424 [2023-01-28 10:29:08,139 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 671 transitions. [2023-01-28 10:29:08,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 671 transitions. [2023-01-28 10:29:08,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:08,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 671 transitions. [2023-01-28 10:29:08,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 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 10:29:08,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 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 10:29:08,144 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 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 10:29:08,144 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 554 flow. Second operand 11 states and 671 transitions. [2023-01-28 10:29:08,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 866 flow [2023-01-28 10:29:08,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 771 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-01-28 10:29:08,149 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 546 flow [2023-01-28 10:29:08,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=546, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-01-28 10:29:08,149 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-01-28 10:29:08,149 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 546 flow [2023-01-28 10:29:08,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:08,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:08,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:08,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:08,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 10:29:08,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:08,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:08,355 INFO L85 PathProgramCache]: Analyzing trace with hash 209179710, now seen corresponding path program 6 times [2023-01-28 10:29:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:08,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972585582] [2023-01-28 10:29:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:08,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:08,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:08,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972585582] [2023-01-28 10:29:08,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972585582] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:08,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547347712] [2023-01-28 10:29:08,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:29:08,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:08,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:08,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:08,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 10:29:08,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:29:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:08,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:08,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547347712] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:08,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614658011] [2023-01-28 10:29:08,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:08,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:08,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:08,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 546 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:08,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:08,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:08,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:09,427 INFO L130 PetriNetUnfolder]: 208/476 cut-off events. [2023-01-28 10:29:09,428 INFO L131 PetriNetUnfolder]: For 1757/1757 co-relation queries the response was YES. [2023-01-28 10:29:09,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 476 events. 208/476 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2487 event pairs, 3 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2063. Up to 240 conditions per place. [2023-01-28 10:29:09,430 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 94 selfloop transitions, 45 changer transitions 16/155 dead transitions. [2023-01-28 10:29:09,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1263 flow [2023-01-28 10:29:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:29:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:29:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1344 transitions. [2023-01-28 10:29:09,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019138755980861 [2023-01-28 10:29:09,433 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1344 transitions. [2023-01-28 10:29:09,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1344 transitions. [2023-01-28 10:29:09,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:09,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1344 transitions. [2023-01-28 10:29:09,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.09090909090909) internal successors, (1344), 22 states have internal predecessors, (1344), 0 states have call successors, (0), 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 10:29:09,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 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 10:29:09,439 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 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 10:29:09,439 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 546 flow. Second operand 22 states and 1344 transitions. [2023-01-28 10:29:09,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1263 flow [2023-01-28 10:29:09,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1212 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-01-28 10:29:09,446 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 874 flow [2023-01-28 10:29:09,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=874, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2023-01-28 10:29:09,447 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2023-01-28 10:29:09,447 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 874 flow [2023-01-28 10:29:09,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:09,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:09,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:09,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 10:29:09,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:09,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:09,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash 135490230, now seen corresponding path program 7 times [2023-01-28 10:29:09,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:09,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463454416] [2023-01-28 10:29:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:09,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463454416] [2023-01-28 10:29:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463454416] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445810790] [2023-01-28 10:29:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:29:09,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:09,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:09,776 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:09,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 10:29:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:09,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445810790] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:10,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618424941] [2023-01-28 10:29:10,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:10,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:10,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:10,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 874 flow. Second operand has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 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 10:29:10,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:10,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:10,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:10,722 INFO L130 PetriNetUnfolder]: 203/442 cut-off events. [2023-01-28 10:29:10,722 INFO L131 PetriNetUnfolder]: For 2236/2236 co-relation queries the response was YES. [2023-01-28 10:29:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 442 events. 203/442 cut-off events. For 2236/2236 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2193 event pairs, 3 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 2196. Up to 236 conditions per place. [2023-01-28 10:29:10,725 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 71 selfloop transitions, 38 changer transitions 28/137 dead transitions. [2023-01-28 10:29:10,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1289 flow [2023-01-28 10:29:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:29:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:29:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1157 transitions. [2023-01-28 10:29:10,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006232686980609 [2023-01-28 10:29:10,726 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1157 transitions. [2023-01-28 10:29:10,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1157 transitions. [2023-01-28 10:29:10,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:10,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1157 transitions. [2023-01-28 10:29:10,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 0 states have call successors, (0), 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 10:29:10,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:10,731 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:10,731 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 874 flow. Second operand 19 states and 1157 transitions. [2023-01-28 10:29:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1289 flow [2023-01-28 10:29:10,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1113 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-01-28 10:29:10,743 INFO L231 Difference]: Finished difference. Result has 122 places, 87 transitions, 782 flow [2023-01-28 10:29:10,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=782, PETRI_PLACES=122, PETRI_TRANSITIONS=87} [2023-01-28 10:29:10,743 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-01-28 10:29:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 87 transitions, 782 flow [2023-01-28 10:29:10,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 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 10:29:10,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:10,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:10,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 10:29:10,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:10,948 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:10,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1069243532, now seen corresponding path program 8 times [2023-01-28 10:29:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:10,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626917865] [2023-01-28 10:29:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:10,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:11,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626917865] [2023-01-28 10:29:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626917865] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981441320] [2023-01-28 10:29:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:11,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:11,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:29:11,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:11,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:11,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:11,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:11,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981441320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:11,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:11,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:29:11,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726849390] [2023-01-28 10:29:11,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:11,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:11,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:11,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 87 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:11,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:11,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:11,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:11,649 INFO L130 PetriNetUnfolder]: 188/399 cut-off events. [2023-01-28 10:29:11,649 INFO L131 PetriNetUnfolder]: For 1561/1561 co-relation queries the response was YES. [2023-01-28 10:29:11,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 399 events. 188/399 cut-off events. For 1561/1561 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1837 event pairs, 9 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1896. Up to 214 conditions per place. [2023-01-28 10:29:11,652 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-01-28 10:29:11,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 1141 flow [2023-01-28 10:29:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:29:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:29:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 733 transitions. [2023-01-28 10:29:11,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018640350877193 [2023-01-28 10:29:11,654 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 733 transitions. [2023-01-28 10:29:11,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 733 transitions. [2023-01-28 10:29:11,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:11,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 733 transitions. [2023-01-28 10:29:11,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.083333333333336) internal successors, (733), 12 states have internal predecessors, (733), 0 states have call successors, (0), 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 10:29:11,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 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 10:29:11,656 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 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 10:29:11,656 INFO L175 Difference]: Start difference. First operand has 122 places, 87 transitions, 782 flow. Second operand 12 states and 733 transitions. [2023-01-28 10:29:11,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 1141 flow [2023-01-28 10:29:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 1022 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-01-28 10:29:11,663 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 746 flow [2023-01-28 10:29:11,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2023-01-28 10:29:11,663 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-01-28 10:29:11,663 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 746 flow [2023-01-28 10:29:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 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 10:29:11,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:11,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:11,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 10:29:11,870 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:11,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1595484335, now seen corresponding path program 9 times [2023-01-28 10:29:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:11,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717467912] [2023-01-28 10:29:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:11,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:12,051 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 10:29:12,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:12,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717467912] [2023-01-28 10:29:12,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717467912] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945503981] [2023-01-28 10:29:12,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:29:12,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:12,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:12,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:12,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 10:29:12,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:29:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:12,278 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 10:29:12,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:12,482 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 10:29:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945503981] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:12,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 10:29:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851771061] [2023-01-28 10:29:12,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:12,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:29:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:29:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:29:12,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:12,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 746 flow. Second operand has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 0 states have call successors, (0), 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 10:29:12,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:12,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:12,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:13,751 INFO L130 PetriNetUnfolder]: 298/649 cut-off events. [2023-01-28 10:29:13,751 INFO L131 PetriNetUnfolder]: For 2333/2333 co-relation queries the response was YES. [2023-01-28 10:29:13,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 649 events. 298/649 cut-off events. For 2333/2333 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3532 event pairs, 2 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 2820. Up to 182 conditions per place. [2023-01-28 10:29:13,755 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 145 selfloop transitions, 94 changer transitions 31/270 dead transitions. [2023-01-28 10:29:13,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 2195 flow [2023-01-28 10:29:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 10:29:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 10:29:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2349 transitions. [2023-01-28 10:29:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40668282548476453 [2023-01-28 10:29:13,758 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2349 transitions. [2023-01-28 10:29:13,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2349 transitions. [2023-01-28 10:29:13,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:13,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2349 transitions. [2023-01-28 10:29:13,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 61.81578947368421) internal successors, (2349), 38 states have internal predecessors, (2349), 0 states have call successors, (0), 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 10:29:13,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 0 states have call successors, (0), 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 10:29:13,765 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 0 states have call successors, (0), 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 10:29:13,765 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 746 flow. Second operand 38 states and 2349 transitions. [2023-01-28 10:29:13,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 2195 flow [2023-01-28 10:29:13,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 270 transitions, 2085 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-01-28 10:29:13,776 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1449 flow [2023-01-28 10:29:13,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1449, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-01-28 10:29:13,777 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-01-28 10:29:13,777 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1449 flow [2023-01-28 10:29:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 0 states have call successors, (0), 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 10:29:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:13,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 10:29:13,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:29:13,983 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:13,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash -749756410, now seen corresponding path program 1 times [2023-01-28 10:29:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:13,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289092380] [2023-01-28 10:29:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289092380] [2023-01-28 10:29:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289092380] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446733696] [2023-01-28 10:29:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:14,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:14,097 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:14,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 10:29:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:14,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:14,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446733696] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:14,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 10:29:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57703685] [2023-01-28 10:29:14,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:14,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:29:14,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:29:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:29:14,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:14,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1449 flow. Second operand has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 0 states have call successors, (0), 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 10:29:14,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:14,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:14,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:14,813 INFO L130 PetriNetUnfolder]: 427/905 cut-off events. [2023-01-28 10:29:14,813 INFO L131 PetriNetUnfolder]: For 4514/4514 co-relation queries the response was YES. [2023-01-28 10:29:14,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 905 events. 427/905 cut-off events. For 4514/4514 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5277 event pairs, 10 based on Foata normal form. 5/908 useless extension candidates. Maximal degree in co-relation 4436. Up to 237 conditions per place. [2023-01-28 10:29:14,819 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 164 selfloop transitions, 68 changer transitions 17/249 dead transitions. [2023-01-28 10:29:14,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 249 transitions, 2712 flow [2023-01-28 10:29:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:29:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:29:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1071 transitions. [2023-01-28 10:29:14,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-01-28 10:29:14,821 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1071 transitions. [2023-01-28 10:29:14,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1071 transitions. [2023-01-28 10:29:14,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:14,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1071 transitions. [2023-01-28 10:29:14,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.0) internal successors, (1071), 17 states have internal predecessors, (1071), 0 states have call successors, (0), 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 10:29:14,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 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 10:29:14,824 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 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 10:29:14,824 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1449 flow. Second operand 17 states and 1071 transitions. [2023-01-28 10:29:14,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 249 transitions, 2712 flow [2023-01-28 10:29:14,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 249 transitions, 2279 flow, removed 191 selfloop flow, removed 15 redundant places. [2023-01-28 10:29:14,846 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 1585 flow [2023-01-28 10:29:14,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2023-01-28 10:29:14,846 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-01-28 10:29:14,846 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 1585 flow [2023-01-28 10:29:14,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 0 states have call successors, (0), 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 10:29:14,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:14,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:14,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:15,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 10:29:15,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:15,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:15,051 INFO L85 PathProgramCache]: Analyzing trace with hash 976032698, now seen corresponding path program 2 times [2023-01-28 10:29:15,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:15,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377093723] [2023-01-28 10:29:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:15,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377093723] [2023-01-28 10:29:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377093723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533300839] [2023-01-28 10:29:15,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:15,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:15,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:15,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:15,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 10:29:15,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:15,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 10:29:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:15,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533300839] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:15,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:15,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 10:29:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638183017] [2023-01-28 10:29:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:15,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:29:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:29:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:29:15,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:15,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 1585 flow. Second operand has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 0 states have call successors, (0), 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 10:29:15,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:15,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:15,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:15,888 INFO L130 PetriNetUnfolder]: 411/855 cut-off events. [2023-01-28 10:29:15,888 INFO L131 PetriNetUnfolder]: For 3772/3772 co-relation queries the response was YES. [2023-01-28 10:29:15,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 855 events. 411/855 cut-off events. For 3772/3772 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4799 event pairs, 10 based on Foata normal form. 5/860 useless extension candidates. Maximal degree in co-relation 4149. Up to 217 conditions per place. [2023-01-28 10:29:15,893 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 60 changer transitions 40/239 dead transitions. [2023-01-28 10:29:15,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2513 flow [2023-01-28 10:29:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:29:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:29:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1175 transitions. [2023-01-28 10:29:15,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40685595567867033 [2023-01-28 10:29:15,894 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1175 transitions. [2023-01-28 10:29:15,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1175 transitions. [2023-01-28 10:29:15,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:15,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1175 transitions. [2023-01-28 10:29:15,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.8421052631579) internal successors, (1175), 19 states have internal predecessors, (1175), 0 states have call successors, (0), 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 10:29:15,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:15,898 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:15,898 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 1585 flow. Second operand 19 states and 1175 transitions. [2023-01-28 10:29:15,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2513 flow [2023-01-28 10:29:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 239 transitions, 2420 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-28 10:29:15,915 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 1473 flow [2023-01-28 10:29:15,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1473, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2023-01-28 10:29:15,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-01-28 10:29:15,916 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 1473 flow [2023-01-28 10:29:15,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 0 states have call successors, (0), 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 10:29:15,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:15,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:15,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:29:16,122 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:16,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1591276241, now seen corresponding path program 10 times [2023-01-28 10:29:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118772538] [2023-01-28 10:29:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:16,259 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 10:29:16,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118772538] [2023-01-28 10:29:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118772538] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105719293] [2023-01-28 10:29:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:29:16,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:16,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:16,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:16,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 10:29:16,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:29:16,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:16,462 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 10:29:16,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:16,669 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 10:29:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105719293] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:16,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 10:29:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070159892] [2023-01-28 10:29:16,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:16,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:29:16,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:29:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:29:16,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:16,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 1473 flow. Second operand has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 0 states have call successors, (0), 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 10:29:16,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:16,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:16,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:17,502 INFO L130 PetriNetUnfolder]: 334/717 cut-off events. [2023-01-28 10:29:17,502 INFO L131 PetriNetUnfolder]: For 3992/3992 co-relation queries the response was YES. [2023-01-28 10:29:17,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 717 events. 334/717 cut-off events. For 3992/3992 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3975 event pairs, 2 based on Foata normal form. 4/721 useless extension candidates. Maximal degree in co-relation 3542. Up to 274 conditions per place. [2023-01-28 10:29:17,507 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 112 selfloop transitions, 78 changer transitions 24/214 dead transitions. [2023-01-28 10:29:17,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 214 transitions, 2109 flow [2023-01-28 10:29:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 10:29:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 10:29:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1660 transitions. [2023-01-28 10:29:17,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044834307992203 [2023-01-28 10:29:17,509 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1660 transitions. [2023-01-28 10:29:17,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1660 transitions. [2023-01-28 10:29:17,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:17,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1660 transitions. [2023-01-28 10:29:17,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.48148148148148) internal successors, (1660), 27 states have internal predecessors, (1660), 0 states have call successors, (0), 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 10:29:17,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 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 10:29:17,514 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 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 10:29:17,514 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 1473 flow. Second operand 27 states and 1660 transitions. [2023-01-28 10:29:17,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 214 transitions, 2109 flow [2023-01-28 10:29:17,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 1933 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-01-28 10:29:17,530 INFO L231 Difference]: Finished difference. Result has 153 places, 137 transitions, 1439 flow [2023-01-28 10:29:17,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1439, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2023-01-28 10:29:17,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-01-28 10:29:17,530 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 1439 flow [2023-01-28 10:29:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 0 states have call successors, (0), 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 10:29:17,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:17,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:17,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:17,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 10:29:17,735 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:17,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 716408728, now seen corresponding path program 11 times [2023-01-28 10:29:17,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:17,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107053276] [2023-01-28 10:29:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:17,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:17,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:17,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107053276] [2023-01-28 10:29:17,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107053276] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:17,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655152661] [2023-01-28 10:29:17,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:29:17,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:17,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:17,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:17,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 10:29:17,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:29:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:17,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:18,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:18,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655152661] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:18,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:18,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:18,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168943434] [2023-01-28 10:29:18,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:18,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:18,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:18,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:18,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:18,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:18,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 1439 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:18,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:18,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:18,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:20,366 INFO L130 PetriNetUnfolder]: 603/1334 cut-off events. [2023-01-28 10:29:20,366 INFO L131 PetriNetUnfolder]: For 8809/8809 co-relation queries the response was YES. [2023-01-28 10:29:20,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7150 conditions, 1334 events. 603/1334 cut-off events. For 8809/8809 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8815 event pairs, 6 based on Foata normal form. 8/1342 useless extension candidates. Maximal degree in co-relation 7085. Up to 373 conditions per place. [2023-01-28 10:29:20,375 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 254 selfloop transitions, 179 changer transitions 41/474 dead transitions. [2023-01-28 10:29:20,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 474 transitions, 4798 flow [2023-01-28 10:29:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-28 10:29:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-28 10:29:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4062 transitions. [2023-01-28 10:29:20,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049043062200957 [2023-01-28 10:29:20,386 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4062 transitions. [2023-01-28 10:29:20,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4062 transitions. [2023-01-28 10:29:20,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:20,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4062 transitions. [2023-01-28 10:29:20,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 61.54545454545455) internal successors, (4062), 66 states have internal predecessors, (4062), 0 states have call successors, (0), 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 10:29:20,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 0 states have call successors, (0), 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 10:29:20,397 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 0 states have call successors, (0), 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 10:29:20,397 INFO L175 Difference]: Start difference. First operand has 153 places, 137 transitions, 1439 flow. Second operand 66 states and 4062 transitions. [2023-01-28 10:29:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 474 transitions, 4798 flow [2023-01-28 10:29:20,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 474 transitions, 4165 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-01-28 10:29:20,429 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2985 flow [2023-01-28 10:29:20,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2985, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2023-01-28 10:29:20,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-01-28 10:29:20,430 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2985 flow [2023-01-28 10:29:20,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:20,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:20,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:20,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 10:29:20,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:20,634 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:20,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1336338705, now seen corresponding path program 3 times [2023-01-28 10:29:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290913051] [2023-01-28 10:29:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290913051] [2023-01-28 10:29:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290913051] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840280055] [2023-01-28 10:29:20,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:29:20,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:20,741 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:20,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 10:29:20,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:29:20,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:20,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:21,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840280055] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:21,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:21,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-28 10:29:21,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934424555] [2023-01-28 10:29:21,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:29:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:29:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:29:21,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:21,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2985 flow. Second operand has 19 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 0 states have call successors, (0), 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 10:29:21,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:21,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:21,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:21,527 INFO L130 PetriNetUnfolder]: 625/1370 cut-off events. [2023-01-28 10:29:21,527 INFO L131 PetriNetUnfolder]: For 14056/14056 co-relation queries the response was YES. [2023-01-28 10:29:21,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8302 conditions, 1370 events. 625/1370 cut-off events. For 14056/14056 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9032 event pairs, 24 based on Foata normal form. 10/1376 useless extension candidates. Maximal degree in co-relation 7761. Up to 583 conditions per place. [2023-01-28 10:29:21,538 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 182 selfloop transitions, 83 changer transitions 44/309 dead transitions. [2023-01-28 10:29:21,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 309 transitions, 3955 flow [2023-01-28 10:29:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:29:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:29:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1057 transitions. [2023-01-28 10:29:21,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40905572755417957 [2023-01-28 10:29:21,540 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1057 transitions. [2023-01-28 10:29:21,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1057 transitions. [2023-01-28 10:29:21,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:21,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1057 transitions. [2023-01-28 10:29:21,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.1764705882353) internal successors, (1057), 17 states have internal predecessors, (1057), 0 states have call successors, (0), 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 10:29:21,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 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 10:29:21,544 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 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 10:29:21,544 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2985 flow. Second operand 17 states and 1057 transitions. [2023-01-28 10:29:21,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 309 transitions, 3955 flow [2023-01-28 10:29:21,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 309 transitions, 3131 flow, removed 297 selfloop flow, removed 33 redundant places. [2023-01-28 10:29:21,613 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2394 flow [2023-01-28 10:29:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2394, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2023-01-28 10:29:21,613 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-01-28 10:29:21,613 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2394 flow [2023-01-28 10:29:21,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 0 states have call successors, (0), 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 10:29:21,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:21,614 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:21,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:21,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:21,818 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:21,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash 644016598, now seen corresponding path program 12 times [2023-01-28 10:29:21,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:21,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484390870] [2023-01-28 10:29:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:21,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:21,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484390870] [2023-01-28 10:29:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484390870] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:21,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235587025] [2023-01-28 10:29:21,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:29:21,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:21,973 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 10:29:22,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:29:22,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:22,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:22,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:22,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235587025] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:22,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:22,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550299635] [2023-01-28 10:29:22,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:22,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:22,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:22,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:22,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2394 flow. Second operand has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 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 10:29:22,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:22,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:22,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:24,242 INFO L130 PetriNetUnfolder]: 574/1252 cut-off events. [2023-01-28 10:29:24,242 INFO L131 PetriNetUnfolder]: For 10627/10627 co-relation queries the response was YES. [2023-01-28 10:29:24,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 1252 events. 574/1252 cut-off events. For 10627/10627 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8099 event pairs, 6 based on Foata normal form. 9/1257 useless extension candidates. Maximal degree in co-relation 6396. Up to 299 conditions per place. [2023-01-28 10:29:24,251 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 219 selfloop transitions, 154 changer transitions 42/415 dead transitions. [2023-01-28 10:29:24,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 415 transitions, 4204 flow [2023-01-28 10:29:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 10:29:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 10:29:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3210 transitions. [2023-01-28 10:29:24,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061234817813765 [2023-01-28 10:29:24,255 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3210 transitions. [2023-01-28 10:29:24,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3210 transitions. [2023-01-28 10:29:24,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:24,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3210 transitions. [2023-01-28 10:29:24,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 61.73076923076923) internal successors, (3210), 52 states have internal predecessors, (3210), 0 states have call successors, (0), 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 10:29:24,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 0 states have call successors, (0), 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 10:29:24,263 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 0 states have call successors, (0), 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 10:29:24,263 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2394 flow. Second operand 52 states and 3210 transitions. [2023-01-28 10:29:24,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 415 transitions, 4204 flow [2023-01-28 10:29:24,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 415 transitions, 3734 flow, removed 114 selfloop flow, removed 22 redundant places. [2023-01-28 10:29:24,303 INFO L231 Difference]: Finished difference. Result has 232 places, 236 transitions, 2576 flow [2023-01-28 10:29:24,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2576, PETRI_PLACES=232, PETRI_TRANSITIONS=236} [2023-01-28 10:29:24,304 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-01-28 10:29:24,304 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 236 transitions, 2576 flow [2023-01-28 10:29:24,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 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 10:29:24,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:24,304 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:24,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:24,509 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:24,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash -677900520, now seen corresponding path program 13 times [2023-01-28 10:29:24,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:24,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907028604] [2023-01-28 10:29:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:24,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:24,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907028604] [2023-01-28 10:29:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907028604] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058950320] [2023-01-28 10:29:24,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:29:24,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:24,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:24,667 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:24,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 10:29:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:24,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:25,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058950320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:25,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:25,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834347685] [2023-01-28 10:29:25,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:25,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:25,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:25,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 236 transitions, 2576 flow. Second operand has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 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 10:29:25,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:25,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:25,586 INFO L130 PetriNetUnfolder]: 552/1188 cut-off events. [2023-01-28 10:29:25,586 INFO L131 PetriNetUnfolder]: For 8278/8278 co-relation queries the response was YES. [2023-01-28 10:29:25,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 1188 events. 552/1188 cut-off events. For 8278/8278 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7464 event pairs, 10 based on Foata normal form. 3/1187 useless extension candidates. Maximal degree in co-relation 6208. Up to 307 conditions per place. [2023-01-28 10:29:25,593 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 145 selfloop transitions, 141 changer transitions 36/322 dead transitions. [2023-01-28 10:29:25,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 3658 flow [2023-01-28 10:29:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 10:29:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 10:29:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1431 transitions. [2023-01-28 10:29:25,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409324942791762 [2023-01-28 10:29:25,594 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1431 transitions. [2023-01-28 10:29:25,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1431 transitions. [2023-01-28 10:29:25,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:25,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1431 transitions. [2023-01-28 10:29:25,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 62.21739130434783) internal successors, (1431), 23 states have internal predecessors, (1431), 0 states have call successors, (0), 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 10:29:25,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 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 10:29:25,598 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 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 10:29:25,598 INFO L175 Difference]: Start difference. First operand has 232 places, 236 transitions, 2576 flow. Second operand 23 states and 1431 transitions. [2023-01-28 10:29:25,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 3658 flow [2023-01-28 10:29:25,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 322 transitions, 3333 flow, removed 77 selfloop flow, removed 29 redundant places. [2023-01-28 10:29:25,630 INFO L231 Difference]: Finished difference. Result has 217 places, 233 transitions, 2639 flow [2023-01-28 10:29:25,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2639, PETRI_PLACES=217, PETRI_TRANSITIONS=233} [2023-01-28 10:29:25,631 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-01-28 10:29:25,631 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 233 transitions, 2639 flow [2023-01-28 10:29:25,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 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 10:29:25,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:25,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:25,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:25,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 10:29:25,833 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:25,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash 948168439, now seen corresponding path program 4 times [2023-01-28 10:29:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089260496] [2023-01-28 10:29:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089260496] [2023-01-28 10:29:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089260496] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209947800] [2023-01-28 10:29:25,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:29:25,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:25,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:25,973 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:25,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 10:29:26,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:29:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:26,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209947800] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:26,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 10:29:26,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57826407] [2023-01-28 10:29:26,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:26,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:26,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:26,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 233 transitions, 2639 flow. Second operand has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 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 10:29:26,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:26,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:26,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:26,747 INFO L130 PetriNetUnfolder]: 532/1147 cut-off events. [2023-01-28 10:29:26,747 INFO L131 PetriNetUnfolder]: For 8132/8132 co-relation queries the response was YES. [2023-01-28 10:29:26,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1147 events. 532/1147 cut-off events. For 8132/8132 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7147 event pairs, 10 based on Foata normal form. 10/1153 useless extension candidates. Maximal degree in co-relation 5956. Up to 341 conditions per place. [2023-01-28 10:29:26,753 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 173 selfloop transitions, 90 changer transitions 50/313 dead transitions. [2023-01-28 10:29:26,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 313 transitions, 3653 flow [2023-01-28 10:29:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 10:29:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 10:29:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1299 transitions. [2023-01-28 10:29:26,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069548872180451 [2023-01-28 10:29:26,754 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1299 transitions. [2023-01-28 10:29:26,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1299 transitions. [2023-01-28 10:29:26,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:26,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1299 transitions. [2023-01-28 10:29:26,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.857142857142854) internal successors, (1299), 21 states have internal predecessors, (1299), 0 states have call successors, (0), 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 10:29:26,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 0 states have call successors, (0), 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 10:29:26,758 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 0 states have call successors, (0), 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 10:29:26,758 INFO L175 Difference]: Start difference. First operand has 217 places, 233 transitions, 2639 flow. Second operand 21 states and 1299 transitions. [2023-01-28 10:29:26,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 313 transitions, 3653 flow [2023-01-28 10:29:26,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 313 transitions, 3319 flow, removed 80 selfloop flow, removed 15 redundant places. [2023-01-28 10:29:26,790 INFO L231 Difference]: Finished difference. Result has 221 places, 216 transitions, 2336 flow [2023-01-28 10:29:26,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2336, PETRI_PLACES=221, PETRI_TRANSITIONS=216} [2023-01-28 10:29:26,790 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-01-28 10:29:26,790 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 216 transitions, 2336 flow [2023-01-28 10:29:26,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 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 10:29:26,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:26,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:26,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:26,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:26,995 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:26,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash -731371048, now seen corresponding path program 14 times [2023-01-28 10:29:26,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:26,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339896627] [2023-01-28 10:29:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:26,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:27,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:27,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339896627] [2023-01-28 10:29:27,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339896627] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:27,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342997014] [2023-01-28 10:29:27,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:27,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:27,128 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:27,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 10:29:27,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:27,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342997014] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:27,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342136597] [2023-01-28 10:29:27,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:27,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:27,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:27,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 216 transitions, 2336 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:27,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:27,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:27,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:28,594 INFO L130 PetriNetUnfolder]: 573/1253 cut-off events. [2023-01-28 10:29:28,594 INFO L131 PetriNetUnfolder]: For 9713/9713 co-relation queries the response was YES. [2023-01-28 10:29:28,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 1253 events. 573/1253 cut-off events. For 9713/9713 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8092 event pairs, 6 based on Foata normal form. 13/1262 useless extension candidates. Maximal degree in co-relation 6613. Up to 343 conditions per place. [2023-01-28 10:29:28,601 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 144 changer transitions 94/377 dead transitions. [2023-01-28 10:29:28,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 4416 flow [2023-01-28 10:29:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 10:29:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 10:29:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2369 transitions. [2023-01-28 10:29:28,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39962887989203777 [2023-01-28 10:29:28,603 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2369 transitions. [2023-01-28 10:29:28,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2369 transitions. [2023-01-28 10:29:28,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:28,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2369 transitions. [2023-01-28 10:29:28,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 60.743589743589745) internal successors, (2369), 39 states have internal predecessors, (2369), 0 states have call successors, (0), 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 10:29:28,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 0 states have call successors, (0), 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 10:29:28,608 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 0 states have call successors, (0), 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 10:29:28,608 INFO L175 Difference]: Start difference. First operand has 221 places, 216 transitions, 2336 flow. Second operand 39 states and 2369 transitions. [2023-01-28 10:29:28,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 4416 flow [2023-01-28 10:29:28,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 377 transitions, 4066 flow, removed 60 selfloop flow, removed 26 redundant places. [2023-01-28 10:29:28,642 INFO L231 Difference]: Finished difference. Result has 228 places, 211 transitions, 2624 flow [2023-01-28 10:29:28,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2624, PETRI_PLACES=228, PETRI_TRANSITIONS=211} [2023-01-28 10:29:28,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-01-28 10:29:28,643 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 211 transitions, 2624 flow [2023-01-28 10:29:28,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:28,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:28,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:28,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-28 10:29:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:28,847 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:28,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash 767361305, now seen corresponding path program 5 times [2023-01-28 10:29:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:28,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858167488] [2023-01-28 10:29:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858167488] [2023-01-28 10:29:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858167488] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771202828] [2023-01-28 10:29:28,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:29:28,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:28,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:28,970 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:28,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 10:29:29,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:29:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771202828] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:29,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:29,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 10:29:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162412949] [2023-01-28 10:29:29,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:29,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:29,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:29,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:29,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 211 transitions, 2624 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 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 10:29:29,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:29,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:29,915 INFO L130 PetriNetUnfolder]: 488/1033 cut-off events. [2023-01-28 10:29:29,915 INFO L131 PetriNetUnfolder]: For 8940/8940 co-relation queries the response was YES. [2023-01-28 10:29:29,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 1033 events. 488/1033 cut-off events. For 8940/8940 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6133 event pairs, 12 based on Foata normal form. 14/1047 useless extension candidates. Maximal degree in co-relation 5861. Up to 307 conditions per place. [2023-01-28 10:29:29,921 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 172 selfloop transitions, 102 changer transitions 33/307 dead transitions. [2023-01-28 10:29:29,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 307 transitions, 4032 flow [2023-01-28 10:29:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 10:29:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 10:29:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1475 transitions. [2023-01-28 10:29:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043311403508772 [2023-01-28 10:29:29,923 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1475 transitions. [2023-01-28 10:29:29,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1475 transitions. [2023-01-28 10:29:29,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1475 transitions. [2023-01-28 10:29:29,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 61.458333333333336) internal successors, (1475), 24 states have internal predecessors, (1475), 0 states have call successors, (0), 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 10:29:29,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 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 10:29:29,926 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 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 10:29:29,926 INFO L175 Difference]: Start difference. First operand has 228 places, 211 transitions, 2624 flow. Second operand 24 states and 1475 transitions. [2023-01-28 10:29:29,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 307 transitions, 4032 flow [2023-01-28 10:29:29,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3591 flow, removed 146 selfloop flow, removed 32 redundant places. [2023-01-28 10:29:29,957 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2510 flow [2023-01-28 10:29:29,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2510, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2023-01-28 10:29:29,958 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-01-28 10:29:29,958 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2510 flow [2023-01-28 10:29:29,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 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 10:29:29,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:29,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:29,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:30,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:30,162 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:30,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1622667959, now seen corresponding path program 6 times [2023-01-28 10:29:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455390567] [2023-01-28 10:29:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:30,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:30,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455390567] [2023-01-28 10:29:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455390567] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590438923] [2023-01-28 10:29:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:29:30,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:30,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:30,298 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:30,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 10:29:30,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:29:30,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:30,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:30,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590438923] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:30,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:30,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 10:29:30,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123157799] [2023-01-28 10:29:30,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:30,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:30,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:30,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:30,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2510 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 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 10:29:30,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:30,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:30,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:31,007 INFO L130 PetriNetUnfolder]: 506/1046 cut-off events. [2023-01-28 10:29:31,008 INFO L131 PetriNetUnfolder]: For 7465/7465 co-relation queries the response was YES. [2023-01-28 10:29:31,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 1046 events. 506/1046 cut-off events. For 7465/7465 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6101 event pairs, 8 based on Foata normal form. 5/1051 useless extension candidates. Maximal degree in co-relation 5735. Up to 329 conditions per place. [2023-01-28 10:29:31,013 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 183 selfloop transitions, 111 changer transitions 17/311 dead transitions. [2023-01-28 10:29:31,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 3841 flow [2023-01-28 10:29:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:29:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:29:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1182 transitions. [2023-01-28 10:29:31,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092797783933518 [2023-01-28 10:29:31,033 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1182 transitions. [2023-01-28 10:29:31,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1182 transitions. [2023-01-28 10:29:31,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:31,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1182 transitions. [2023-01-28 10:29:31,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 62.21052631578947) internal successors, (1182), 19 states have internal predecessors, (1182), 0 states have call successors, (0), 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 10:29:31,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:31,036 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:31,036 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2510 flow. Second operand 19 states and 1182 transitions. [2023-01-28 10:29:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 3841 flow [2023-01-28 10:29:31,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 3616 flow, removed 54 selfloop flow, removed 17 redundant places. [2023-01-28 10:29:31,067 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2941 flow [2023-01-28 10:29:31,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2941, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2023-01-28 10:29:31,067 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-01-28 10:29:31,068 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2941 flow [2023-01-28 10:29:31,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 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 10:29:31,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:31,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:31,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:31,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 10:29:31,272 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:31,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1548978479, now seen corresponding path program 7 times [2023-01-28 10:29:31,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:31,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967073967] [2023-01-28 10:29:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:31,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967073967] [2023-01-28 10:29:31,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967073967] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502100546] [2023-01-28 10:29:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:29:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:31,397 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:31,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 10:29:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:31,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:31,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502100546] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:31,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:31,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 10:29:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133627506] [2023-01-28 10:29:31,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:31,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:31,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2941 flow. Second operand has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 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 10:29:31,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:31,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:32,096 INFO L130 PetriNetUnfolder]: 499/1021 cut-off events. [2023-01-28 10:29:32,097 INFO L131 PetriNetUnfolder]: For 7989/7989 co-relation queries the response was YES. [2023-01-28 10:29:32,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1021 events. 499/1021 cut-off events. For 7989/7989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5885 event pairs, 8 based on Foata normal form. 3/1024 useless extension candidates. Maximal degree in co-relation 5845. Up to 329 conditions per place. [2023-01-28 10:29:32,102 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 178 selfloop transitions, 101 changer transitions 19/298 dead transitions. [2023-01-28 10:29:32,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 3838 flow [2023-01-28 10:29:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:29:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:29:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1170 transitions. [2023-01-28 10:29:32,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051246537396122 [2023-01-28 10:29:32,122 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1170 transitions. [2023-01-28 10:29:32,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1170 transitions. [2023-01-28 10:29:32,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:32,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1170 transitions. [2023-01-28 10:29:32,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.578947368421055) internal successors, (1170), 19 states have internal predecessors, (1170), 0 states have call successors, (0), 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 10:29:32,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:32,125 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:32,125 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2941 flow. Second operand 19 states and 1170 transitions. [2023-01-28 10:29:32,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 3838 flow [2023-01-28 10:29:32,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 3706 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-01-28 10:29:32,157 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3009 flow [2023-01-28 10:29:32,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3009, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2023-01-28 10:29:32,157 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-01-28 10:29:32,157 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3009 flow [2023-01-28 10:29:32,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 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 10:29:32,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:32,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:32,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:32,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 10:29:32,362 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:32,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash 240012320, now seen corresponding path program 15 times [2023-01-28 10:29:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045203478] [2023-01-28 10:29:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:32,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:32,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:32,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045203478] [2023-01-28 10:29:32,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045203478] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:32,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374314191] [2023-01-28 10:29:32,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:29:32,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:32,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:32,465 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:32,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 10:29:32,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:29:32,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:32,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:32,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374314191] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:32,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:32,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514506836] [2023-01-28 10:29:32,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:32,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:32,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:32,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3009 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:32,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:32,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:32,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:33,776 INFO L130 PetriNetUnfolder]: 558/1144 cut-off events. [2023-01-28 10:29:33,776 INFO L131 PetriNetUnfolder]: For 9340/9340 co-relation queries the response was YES. [2023-01-28 10:29:33,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1144 events. 558/1144 cut-off events. For 9340/9340 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6777 event pairs, 3 based on Foata normal form. 5/1149 useless extension candidates. Maximal degree in co-relation 6693. Up to 561 conditions per place. [2023-01-28 10:29:33,804 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 231 selfloop transitions, 85 changer transitions 51/367 dead transitions. [2023-01-28 10:29:33,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 367 transitions, 4711 flow [2023-01-28 10:29:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 10:29:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 10:29:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2238 transitions. [2023-01-28 10:29:33,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39793741109530584 [2023-01-28 10:29:33,806 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2238 transitions. [2023-01-28 10:29:33,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2238 transitions. [2023-01-28 10:29:33,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:33,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2238 transitions. [2023-01-28 10:29:33,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 60.486486486486484) internal successors, (2238), 37 states have internal predecessors, (2238), 0 states have call successors, (0), 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 10:29:33,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 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 10:29:33,811 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 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 10:29:33,811 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3009 flow. Second operand 37 states and 2238 transitions. [2023-01-28 10:29:33,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 367 transitions, 4711 flow [2023-01-28 10:29:33,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 367 transitions, 4424 flow, removed 49 selfloop flow, removed 17 redundant places. [2023-01-28 10:29:33,848 INFO L231 Difference]: Finished difference. Result has 227 places, 258 transitions, 3410 flow [2023-01-28 10:29:33,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3410, PETRI_PLACES=227, PETRI_TRANSITIONS=258} [2023-01-28 10:29:33,853 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-01-28 10:29:33,853 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 258 transitions, 3410 flow [2023-01-28 10:29:33,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:33,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:33,853 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:33,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:34,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 10:29:34,058 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:34,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2011172568, now seen corresponding path program 16 times [2023-01-28 10:29:34,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:34,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366592060] [2023-01-28 10:29:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:34,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366592060] [2023-01-28 10:29:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366592060] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758348533] [2023-01-28 10:29:34,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:29:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:34,203 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 10:29:34,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:29:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:34,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758348533] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:34,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:34,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504605645] [2023-01-28 10:29:34,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:34,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:34,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 258 transitions, 3410 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:34,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:34,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:34,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:34,979 INFO L130 PetriNetUnfolder]: 521/1041 cut-off events. [2023-01-28 10:29:34,979 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-01-28 10:29:34,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6454 conditions, 1041 events. 521/1041 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5865 event pairs, 7 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 6397. Up to 693 conditions per place. [2023-01-28 10:29:34,987 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 216 selfloop transitions, 46 changer transitions 30/292 dead transitions. [2023-01-28 10:29:34,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 292 transitions, 4160 flow [2023-01-28 10:29:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:29:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:29:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 903 transitions. [2023-01-28 10:29:35,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960526315789474 [2023-01-28 10:29:35,008 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 903 transitions. [2023-01-28 10:29:35,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 903 transitions. [2023-01-28 10:29:35,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:35,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 903 transitions. [2023-01-28 10:29:35,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.2) internal successors, (903), 15 states have internal predecessors, (903), 0 states have call successors, (0), 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 10:29:35,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 0 states have call successors, (0), 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 10:29:35,010 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 0 states have call successors, (0), 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 10:29:35,010 INFO L175 Difference]: Start difference. First operand has 227 places, 258 transitions, 3410 flow. Second operand 15 states and 903 transitions. [2023-01-28 10:29:35,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 292 transitions, 4160 flow [2023-01-28 10:29:35,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 292 transitions, 3690 flow, removed 164 selfloop flow, removed 21 redundant places. [2023-01-28 10:29:35,049 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 3010 flow [2023-01-28 10:29:35,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3010, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2023-01-28 10:29:35,050 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-01-28 10:29:35,050 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 3010 flow [2023-01-28 10:29:35,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:35,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:35,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:35,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:35,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:35,255 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:35,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:35,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1960378635, now seen corresponding path program 8 times [2023-01-28 10:29:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:35,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779485802] [2023-01-28 10:29:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779485802] [2023-01-28 10:29:35,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779485802] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114854083] [2023-01-28 10:29:35,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:35,363 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:35,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 10:29:35,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:35,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114854083] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:35,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:35,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 10:29:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592483533] [2023-01-28 10:29:35,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:35,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:35,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:35,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:35,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 3010 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 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 10:29:35,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:35,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:35,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:36,102 INFO L130 PetriNetUnfolder]: 511/1007 cut-off events. [2023-01-28 10:29:36,103 INFO L131 PetriNetUnfolder]: For 8066/8066 co-relation queries the response was YES. [2023-01-28 10:29:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5805 conditions, 1007 events. 511/1007 cut-off events. For 8066/8066 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5546 event pairs, 9 based on Foata normal form. 9/1016 useless extension candidates. Maximal degree in co-relation 5752. Up to 657 conditions per place. [2023-01-28 10:29:36,108 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 236 selfloop transitions, 31 changer transitions 41/308 dead transitions. [2023-01-28 10:29:36,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 308 transitions, 3877 flow [2023-01-28 10:29:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:29:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:29:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1157 transitions. [2023-01-28 10:29:36,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006232686980609 [2023-01-28 10:29:36,110 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1157 transitions. [2023-01-28 10:29:36,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1157 transitions. [2023-01-28 10:29:36,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:36,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1157 transitions. [2023-01-28 10:29:36,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 0 states have call successors, (0), 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 10:29:36,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:36,113 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 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 10:29:36,113 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 3010 flow. Second operand 19 states and 1157 transitions. [2023-01-28 10:29:36,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 308 transitions, 3877 flow [2023-01-28 10:29:36,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 308 transitions, 3653 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-01-28 10:29:36,149 INFO L231 Difference]: Finished difference. Result has 200 places, 241 transitions, 2722 flow [2023-01-28 10:29:36,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2722, PETRI_PLACES=200, PETRI_TRANSITIONS=241} [2023-01-28 10:29:36,150 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-01-28 10:29:36,150 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 241 transitions, 2722 flow [2023-01-28 10:29:36,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 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 10:29:36,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:36,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:36,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:36,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:36,355 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:36,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:36,356 INFO L85 PathProgramCache]: Analyzing trace with hash 280573377, now seen corresponding path program 9 times [2023-01-28 10:29:36,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:36,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987388651] [2023-01-28 10:29:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:36,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987388651] [2023-01-28 10:29:36,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987388651] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360429898] [2023-01-28 10:29:36,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:29:36,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:36,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:36,457 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:36,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 10:29:36,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:29:36,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 10:29:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:36,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360429898] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 10:29:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330916996] [2023-01-28 10:29:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:36,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 241 transitions, 2722 flow. Second operand has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 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 10:29:36,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:36,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:37,178 INFO L130 PetriNetUnfolder]: 463/959 cut-off events. [2023-01-28 10:29:37,178 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-01-28 10:29:37,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 959 events. 463/959 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5503 event pairs, 7 based on Foata normal form. 7/964 useless extension candidates. Maximal degree in co-relation 5237. Up to 657 conditions per place. [2023-01-28 10:29:37,182 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 248 selfloop transitions, 28 changer transitions 18/294 dead transitions. [2023-01-28 10:29:37,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 294 transitions, 3593 flow [2023-01-28 10:29:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:29:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:29:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1040 transitions. [2023-01-28 10:29:37,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024767801857585 [2023-01-28 10:29:37,185 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1040 transitions. [2023-01-28 10:29:37,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1040 transitions. [2023-01-28 10:29:37,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:37,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1040 transitions. [2023-01-28 10:29:37,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.1764705882353) internal successors, (1040), 17 states have internal predecessors, (1040), 0 states have call successors, (0), 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 10:29:37,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 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 10:29:37,188 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 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 10:29:37,188 INFO L175 Difference]: Start difference. First operand has 200 places, 241 transitions, 2722 flow. Second operand 17 states and 1040 transitions. [2023-01-28 10:29:37,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 294 transitions, 3593 flow [2023-01-28 10:29:37,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 294 transitions, 3387 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-01-28 10:29:37,211 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2638 flow [2023-01-28 10:29:37,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2638, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2023-01-28 10:29:37,212 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-01-28 10:29:37,212 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2638 flow [2023-01-28 10:29:37,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 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 10:29:37,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:37,212 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:37,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:37,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-28 10:29:37,417 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:37,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -606930304, now seen corresponding path program 17 times [2023-01-28 10:29:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:37,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46008081] [2023-01-28 10:29:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:37,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46008081] [2023-01-28 10:29:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46008081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271057488] [2023-01-28 10:29:37,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:29:37,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:37,569 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:37,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 10:29:37,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:29:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:37,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:37,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271057488] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:37,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934136618] [2023-01-28 10:29:37,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:37,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:37,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:37,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:37,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2638 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:37,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:37,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:39,026 INFO L130 PetriNetUnfolder]: 478/996 cut-off events. [2023-01-28 10:29:39,026 INFO L131 PetriNetUnfolder]: For 5549/5549 co-relation queries the response was YES. [2023-01-28 10:29:39,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 996 events. 478/996 cut-off events. For 5549/5549 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5773 event pairs, 3 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 5478. Up to 535 conditions per place. [2023-01-28 10:29:39,031 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 221 selfloop transitions, 78 changer transitions 18/317 dead transitions. [2023-01-28 10:29:39,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 3735 flow [2023-01-28 10:29:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 10:29:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 10:29:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1748 transitions. [2023-01-28 10:29:39,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2023-01-28 10:29:39,033 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1748 transitions. [2023-01-28 10:29:39,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1748 transitions. [2023-01-28 10:29:39,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:39,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1748 transitions. [2023-01-28 10:29:39,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.275862068965516) internal successors, (1748), 29 states have internal predecessors, (1748), 0 states have call successors, (0), 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 10:29:39,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 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 10:29:39,055 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 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 10:29:39,055 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2638 flow. Second operand 29 states and 1748 transitions. [2023-01-28 10:29:39,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 3735 flow [2023-01-28 10:29:39,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 3663 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-01-28 10:29:39,076 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2946 flow [2023-01-28 10:29:39,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2946, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2023-01-28 10:29:39,077 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-01-28 10:29:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2946 flow [2023-01-28 10:29:39,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:39,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:39,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 10:29:39,283 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:39,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash -579224674, now seen corresponding path program 18 times [2023-01-28 10:29:39,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:39,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220359007] [2023-01-28 10:29:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:39,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220359007] [2023-01-28 10:29:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220359007] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256438333] [2023-01-28 10:29:39,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:29:39,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:39,424 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:39,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 10:29:39,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:29:39,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:39,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:39,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256438333] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:39,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:39,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-28 10:29:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533635807] [2023-01-28 10:29:39,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:39,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:29:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:29:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:29:39,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:39,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2946 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:39,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:39,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:39,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:40,959 INFO L130 PetriNetUnfolder]: 474/971 cut-off events. [2023-01-28 10:29:40,960 INFO L131 PetriNetUnfolder]: For 6452/6452 co-relation queries the response was YES. [2023-01-28 10:29:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 971 events. 474/971 cut-off events. For 6452/6452 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5491 event pairs, 5 based on Foata normal form. 6/975 useless extension candidates. Maximal degree in co-relation 5648. Up to 537 conditions per place. [2023-01-28 10:29:40,964 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 199 selfloop transitions, 79 changer transitions 39/317 dead transitions. [2023-01-28 10:29:40,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 3925 flow [2023-01-28 10:29:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:29:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:29:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1922 transitions. [2023-01-28 10:29:40,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951480263157895 [2023-01-28 10:29:40,966 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1922 transitions. [2023-01-28 10:29:40,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1922 transitions. [2023-01-28 10:29:40,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:40,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1922 transitions. [2023-01-28 10:29:40,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 60.0625) internal successors, (1922), 32 states have internal predecessors, (1922), 0 states have call successors, (0), 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 10:29:40,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 0 states have call successors, (0), 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 10:29:40,970 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 0 states have call successors, (0), 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 10:29:40,970 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2946 flow. Second operand 32 states and 1922 transitions. [2023-01-28 10:29:40,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 3925 flow [2023-01-28 10:29:40,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 317 transitions, 3777 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-01-28 10:29:41,001 INFO L231 Difference]: Finished difference. Result has 235 places, 246 transitions, 2926 flow [2023-01-28 10:29:41,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2926, PETRI_PLACES=235, PETRI_TRANSITIONS=246} [2023-01-28 10:29:41,001 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places. [2023-01-28 10:29:41,001 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 246 transitions, 2926 flow [2023-01-28 10:29:41,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 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 10:29:41,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:41,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:41,206 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:41,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:41,206 INFO L85 PathProgramCache]: Analyzing trace with hash 925330163, now seen corresponding path program 19 times [2023-01-28 10:29:41,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:41,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160331651] [2023-01-28 10:29:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:41,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:41,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160331651] [2023-01-28 10:29:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160331651] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109918654] [2023-01-28 10:29:41,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:29:41,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:41,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:41,329 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:41,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 10:29:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 10:29:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:41,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109918654] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:41,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:41,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-01-28 10:29:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597079325] [2023-01-28 10:29:41,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:41,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 10:29:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 10:29:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-01-28 10:29:41,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:41,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 246 transitions, 2926 flow. Second operand has 26 states, 26 states have (on average 57.80769230769231) internal successors, (1503), 26 states have internal predecessors, (1503), 0 states have call successors, (0), 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 10:29:41,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:41,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:41,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:43,059 INFO L130 PetriNetUnfolder]: 559/1145 cut-off events. [2023-01-28 10:29:43,059 INFO L131 PetriNetUnfolder]: For 7330/7330 co-relation queries the response was YES. [2023-01-28 10:29:43,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1145 events. 559/1145 cut-off events. For 7330/7330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6788 event pairs, 3 based on Foata normal form. 3/1146 useless extension candidates. Maximal degree in co-relation 6863. Up to 419 conditions per place. [2023-01-28 10:29:43,065 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 180 selfloop transitions, 198 changer transitions 20/398 dead transitions. [2023-01-28 10:29:43,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 398 transitions, 4924 flow [2023-01-28 10:29:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 10:29:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 10:29:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2539 transitions. [2023-01-28 10:29:43,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39771303258145363 [2023-01-28 10:29:43,067 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2539 transitions. [2023-01-28 10:29:43,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2539 transitions. [2023-01-28 10:29:43,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:43,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2539 transitions. [2023-01-28 10:29:43,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 60.45238095238095) internal successors, (2539), 42 states have internal predecessors, (2539), 0 states have call successors, (0), 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 10:29:43,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 0 states have call successors, (0), 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 10:29:43,071 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 0 states have call successors, (0), 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 10:29:43,071 INFO L175 Difference]: Start difference. First operand has 235 places, 246 transitions, 2926 flow. Second operand 42 states and 2539 transitions. [2023-01-28 10:29:43,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 398 transitions, 4924 flow [2023-01-28 10:29:43,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 398 transitions, 4665 flow, removed 76 selfloop flow, removed 23 redundant places. [2023-01-28 10:29:43,103 INFO L231 Difference]: Finished difference. Result has 247 places, 292 transitions, 3892 flow [2023-01-28 10:29:43,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3892, PETRI_PLACES=247, PETRI_TRANSITIONS=292} [2023-01-28 10:29:43,103 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-01-28 10:29:43,103 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 292 transitions, 3892 flow [2023-01-28 10:29:43,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 57.80769230769231) internal successors, (1503), 26 states have internal predecessors, (1503), 0 states have call successors, (0), 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 10:29:43,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:43,104 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:43,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:43,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:43,308 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:43,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1602770469, now seen corresponding path program 20 times [2023-01-28 10:29:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:43,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916641388] [2023-01-28 10:29:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:43,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:43,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916641388] [2023-01-28 10:29:43,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916641388] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:43,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417124931] [2023-01-28 10:29:43,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:43,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:43,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:43,433 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:43,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 10:29:43,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 10:29:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:43,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417124931] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:43,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-01-28 10:29:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156741148] [2023-01-28 10:29:43,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:43,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 10:29:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 10:29:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-01-28 10:29:43,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:43,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 292 transitions, 3892 flow. Second operand has 26 states, 26 states have (on average 57.88461538461539) internal successors, (1505), 26 states have internal predecessors, (1505), 0 states have call successors, (0), 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 10:29:43,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:43,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:43,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:44,903 INFO L130 PetriNetUnfolder]: 549/1111 cut-off events. [2023-01-28 10:29:44,903 INFO L131 PetriNetUnfolder]: For 7722/7722 co-relation queries the response was YES. [2023-01-28 10:29:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 1111 events. 549/1111 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6445 event pairs, 3 based on Foata normal form. 3/1102 useless extension candidates. Maximal degree in co-relation 7206. Up to 367 conditions per place. [2023-01-28 10:29:44,911 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 167 selfloop transitions, 180 changer transitions 27/374 dead transitions. [2023-01-28 10:29:44,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 5031 flow [2023-01-28 10:29:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 10:29:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 10:29:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2236 transitions. [2023-01-28 10:29:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39758179231863444 [2023-01-28 10:29:44,913 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2236 transitions. [2023-01-28 10:29:44,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2236 transitions. [2023-01-28 10:29:44,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:44,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2236 transitions. [2023-01-28 10:29:44,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 60.432432432432435) internal successors, (2236), 37 states have internal predecessors, (2236), 0 states have call successors, (0), 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 10:29:44,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 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 10:29:44,918 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 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 10:29:44,918 INFO L175 Difference]: Start difference. First operand has 247 places, 292 transitions, 3892 flow. Second operand 37 states and 2236 transitions. [2023-01-28 10:29:44,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 5031 flow [2023-01-28 10:29:44,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 4764 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-01-28 10:29:44,961 INFO L231 Difference]: Finished difference. Result has 259 places, 285 transitions, 3911 flow [2023-01-28 10:29:44,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3911, PETRI_PLACES=259, PETRI_TRANSITIONS=285} [2023-01-28 10:29:44,961 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-01-28 10:29:44,961 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 285 transitions, 3911 flow [2023-01-28 10:29:44,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 57.88461538461539) internal successors, (1505), 26 states have internal predecessors, (1505), 0 states have call successors, (0), 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 10:29:44,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:44,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:44,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:45,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:45,166 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:45,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 11806669, now seen corresponding path program 10 times [2023-01-28 10:29:45,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:45,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395335068] [2023-01-28 10:29:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:45,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:45,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395335068] [2023-01-28 10:29:45,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395335068] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419204440] [2023-01-28 10:29:45,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:29:45,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:45,289 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:45,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 10:29:45,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:29:45,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:45,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:29:45,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419204440] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:45,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:45,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-01-28 10:29:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672872986] [2023-01-28 10:29:45,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:45,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:29:45,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:45,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:29:45,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:29:45,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:45,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 285 transitions, 3911 flow. Second operand has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 0 states have call successors, (0), 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 10:29:45,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:45,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:45,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:45,981 INFO L130 PetriNetUnfolder]: 531/1086 cut-off events. [2023-01-28 10:29:45,982 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-01-28 10:29:45,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 1086 events. 531/1086 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6316 event pairs, 5 based on Foata normal form. 6/1080 useless extension candidates. Maximal degree in co-relation 7165. Up to 739 conditions per place. [2023-01-28 10:29:45,988 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 233 selfloop transitions, 99 changer transitions 12/344 dead transitions. [2023-01-28 10:29:45,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 344 transitions, 4994 flow [2023-01-28 10:29:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:29:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:29:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1331 transitions. [2023-01-28 10:29:45,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980263157894737 [2023-01-28 10:29:45,989 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1331 transitions. [2023-01-28 10:29:45,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1331 transitions. [2023-01-28 10:29:45,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:45,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1331 transitions. [2023-01-28 10:29:45,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.5) internal successors, (1331), 22 states have internal predecessors, (1331), 0 states have call successors, (0), 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 10:29:45,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 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 10:29:45,992 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 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 10:29:45,992 INFO L175 Difference]: Start difference. First operand has 259 places, 285 transitions, 3911 flow. Second operand 22 states and 1331 transitions. [2023-01-28 10:29:45,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 344 transitions, 4994 flow [2023-01-28 10:29:46,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 344 transitions, 4586 flow, removed 9 selfloop flow, removed 32 redundant places. [2023-01-28 10:29:46,026 INFO L231 Difference]: Finished difference. Result has 237 places, 295 transitions, 3944 flow [2023-01-28 10:29:46,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3944, PETRI_PLACES=237, PETRI_TRANSITIONS=295} [2023-01-28 10:29:46,027 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-01-28 10:29:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 295 transitions, 3944 flow [2023-01-28 10:29:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 0 states have call successors, (0), 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 10:29:46,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:46,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:46,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-28 10:29:46,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 10:29:46,229 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:46,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash -61882811, now seen corresponding path program 11 times [2023-01-28 10:29:46,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:46,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663827032] [2023-01-28 10:29:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:46,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:46,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663827032] [2023-01-28 10:29:46,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663827032] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366091983] [2023-01-28 10:29:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:29:46,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:46,364 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:46,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 10:29:46,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:29:46,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-28 10:29:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:46,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366091983] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:46,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:46,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 10:29:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190889421] [2023-01-28 10:29:46,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:46,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 10:29:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 10:29:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-01-28 10:29:46,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:46,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 295 transitions, 3944 flow. Second operand has 27 states, 27 states have (on average 57.629629629629626) internal successors, (1556), 27 states have internal predecessors, (1556), 0 states have call successors, (0), 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 10:29:46,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:46,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:46,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:47,600 INFO L130 PetriNetUnfolder]: 582/1195 cut-off events. [2023-01-28 10:29:47,600 INFO L131 PetriNetUnfolder]: For 8531/8531 co-relation queries the response was YES. [2023-01-28 10:29:47,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 1195 events. 582/1195 cut-off events. For 8531/8531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7177 event pairs, 1 based on Foata normal form. 4/1185 useless extension candidates. Maximal degree in co-relation 7866. Up to 699 conditions per place. [2023-01-28 10:29:47,607 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 241 selfloop transitions, 117 changer transitions 29/387 dead transitions. [2023-01-28 10:29:47,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 5428 flow [2023-01-28 10:29:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 10:29:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 10:29:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1644 transitions. [2023-01-28 10:29:47,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2023-01-28 10:29:47,609 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1644 transitions. [2023-01-28 10:29:47,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1644 transitions. [2023-01-28 10:29:47,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:47,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1644 transitions. [2023-01-28 10:29:47,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.888888888888886) internal successors, (1644), 27 states have internal predecessors, (1644), 0 states have call successors, (0), 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 10:29:47,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 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 10:29:47,612 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 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 10:29:47,612 INFO L175 Difference]: Start difference. First operand has 237 places, 295 transitions, 3944 flow. Second operand 27 states and 1644 transitions. [2023-01-28 10:29:47,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 5428 flow [2023-01-28 10:29:47,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5284 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-01-28 10:29:47,655 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 4207 flow [2023-01-28 10:29:47,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4207, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2023-01-28 10:29:47,656 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2023-01-28 10:29:47,656 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 4207 flow [2023-01-28 10:29:47,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 57.629629629629626) internal successors, (1556), 27 states have internal predecessors, (1556), 0 states have call successors, (0), 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 10:29:47,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:47,656 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:47,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 10:29:47,861 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:47,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash -905503634, now seen corresponding path program 12 times [2023-01-28 10:29:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394010217] [2023-01-28 10:29:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:47,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:47,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394010217] [2023-01-28 10:29:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394010217] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:47,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78584577] [2023-01-28 10:29:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:29:47,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:47,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:47,987 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:47,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 10:29:48,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:29:48,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:48,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:48,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78584577] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:48,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:48,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-01-28 10:29:48,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276351349] [2023-01-28 10:29:48,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:48,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:48,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:48,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 4207 flow. Second operand has 20 states, 20 states have (on average 57.8) internal successors, (1156), 20 states have internal predecessors, (1156), 0 states have call successors, (0), 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 10:29:48,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:48,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:48,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:48,783 INFO L130 PetriNetUnfolder]: 569/1145 cut-off events. [2023-01-28 10:29:48,784 INFO L131 PetriNetUnfolder]: For 8719/8719 co-relation queries the response was YES. [2023-01-28 10:29:48,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1145 events. 569/1145 cut-off events. For 8719/8719 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6711 event pairs, 3 based on Foata normal form. 13/1146 useless extension candidates. Maximal degree in co-relation 7890. Up to 413 conditions per place. [2023-01-28 10:29:48,789 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 76 selfloop transitions, 11 changer transitions 278/365 dead transitions. [2023-01-28 10:29:48,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 5591 flow [2023-01-28 10:29:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:29:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:29:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1318 transitions. [2023-01-28 10:29:48,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39413875598086123 [2023-01-28 10:29:48,791 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1318 transitions. [2023-01-28 10:29:48,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1318 transitions. [2023-01-28 10:29:48,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:48,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1318 transitions. [2023-01-28 10:29:48,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 59.90909090909091) internal successors, (1318), 22 states have internal predecessors, (1318), 0 states have call successors, (0), 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 10:29:48,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 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 10:29:48,793 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 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 10:29:48,793 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 4207 flow. Second operand 22 states and 1318 transitions. [2023-01-28 10:29:48,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 5591 flow [2023-01-28 10:29:48,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 5266 flow, removed 44 selfloop flow, removed 17 redundant places. [2023-01-28 10:29:48,836 INFO L231 Difference]: Finished difference. Result has 247 places, 83 transitions, 878 flow [2023-01-28 10:29:48,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=878, PETRI_PLACES=247, PETRI_TRANSITIONS=83} [2023-01-28 10:29:48,837 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-01-28 10:29:48,837 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 83 transitions, 878 flow [2023-01-28 10:29:48,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.8) internal successors, (1156), 20 states have internal predecessors, (1156), 0 states have call successors, (0), 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 10:29:48,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:48,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:48,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:49,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 10:29:49,042 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:49,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551673, now seen corresponding path program 13 times [2023-01-28 10:29:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529452207] [2023-01-28 10:29:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529452207] [2023-01-28 10:29:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529452207] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498960216] [2023-01-28 10:29:49,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:29:49,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:49,204 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:49,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 10:29:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:49,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:49,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:29:49,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498960216] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:49,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:49,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-01-28 10:29:49,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798796175] [2023-01-28 10:29:49,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:49,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:29:49,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:29:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:29:49,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:49,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 83 transitions, 878 flow. Second operand has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 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 10:29:49,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:49,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:49,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:49,928 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-01-28 10:29:49,928 INFO L131 PetriNetUnfolder]: For 2336/2336 co-relation queries the response was YES. [2023-01-28 10:29:49,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 308 events. 141/308 cut-off events. For 2336/2336 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1328 event pairs, 0 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1887. Up to 185 conditions per place. [2023-01-28 10:29:49,930 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 57 selfloop transitions, 42 changer transitions 19/118 dead transitions. [2023-01-28 10:29:49,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 118 transitions, 1411 flow [2023-01-28 10:29:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:29:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:29:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1069 transitions. [2023-01-28 10:29:49,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39071637426900585 [2023-01-28 10:29:49,931 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1069 transitions. [2023-01-28 10:29:49,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1069 transitions. [2023-01-28 10:29:49,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:49,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1069 transitions. [2023-01-28 10:29:49,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.388888888888886) internal successors, (1069), 18 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:49,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 0 states have call successors, (0), 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 10:29:49,933 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 0 states have call successors, (0), 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 10:29:49,933 INFO L175 Difference]: Start difference. First operand has 247 places, 83 transitions, 878 flow. Second operand 18 states and 1069 transitions. [2023-01-28 10:29:49,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 118 transitions, 1411 flow [2023-01-28 10:29:49,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1085 flow, removed 77 selfloop flow, removed 38 redundant places. [2023-01-28 10:29:49,941 INFO L231 Difference]: Finished difference. Result has 125 places, 86 transitions, 731 flow [2023-01-28 10:29:49,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=731, PETRI_PLACES=125, PETRI_TRANSITIONS=86} [2023-01-28 10:29:49,941 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-01-28 10:29:49,941 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 86 transitions, 731 flow [2023-01-28 10:29:49,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 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 10:29:49,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:49,941 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:49,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-28 10:29:50,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 10:29:50,145 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:29:50,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1359978278, now seen corresponding path program 14 times [2023-01-28 10:29:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:50,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345252975] [2023-01-28 10:29:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345252975] [2023-01-28 10:29:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345252975] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014085306] [2023-01-28 10:29:50,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:50,261 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:29:50,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 10:29:50,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:50,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 10:29:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:50,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:29:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014085306] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:50,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:50,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-01-28 10:29:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640032145] [2023-01-28 10:29:50,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:29:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:29:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:29:50,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-28 10:29:50,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 86 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 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 10:29:50,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:50,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-28 10:29:50,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:50,831 INFO L130 PetriNetUnfolder]: 133/259 cut-off events. [2023-01-28 10:29:50,831 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-01-28 10:29:50,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 259 events. 133/259 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 952 event pairs, 0 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 1358. Up to 99 conditions per place. [2023-01-28 10:29:50,832 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-01-28 10:29:50,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 114 transitions, 1142 flow [2023-01-28 10:29:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:29:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:29:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 944 transitions. [2023-01-28 10:29:50,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881578947368421 [2023-01-28 10:29:50,833 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 944 transitions. [2023-01-28 10:29:50,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 944 transitions. [2023-01-28 10:29:50,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:50,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 944 transitions. [2023-01-28 10:29:50,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0) internal successors, (944), 16 states have internal predecessors, (944), 0 states have call successors, (0), 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 10:29:50,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 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 10:29:50,835 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 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 10:29:50,835 INFO L175 Difference]: Start difference. First operand has 125 places, 86 transitions, 731 flow. Second operand 16 states and 944 transitions. [2023-01-28 10:29:50,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 114 transitions, 1142 flow [2023-01-28 10:29:50,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1038 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-01-28 10:29:50,839 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-01-28 10:29:50,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-01-28 10:29:50,839 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-01-28 10:29:50,839 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-01-28 10:29:50,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 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 10:29:50,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 10:29:50,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 10:29:50,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 10:29:50,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 10:29:51,046 INFO L445 BasicCegarLoop]: Path program histogram: [20, 14, 6] [2023-01-28 10:29:51,048 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:29:51,048 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:29:51,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:29:51 BasicIcfg [2023-01-28 10:29:51,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:29:51,050 INFO L158 Benchmark]: Toolchain (without parser) took 54095.97ms. Allocated memory was 549.5MB in the beginning and 792.7MB in the end (delta: 243.3MB). Free memory was 503.9MB in the beginning and 730.3MB in the end (delta: -226.4MB). Peak memory consumption was 18.8MB. Max. memory is 16.0GB. [2023-01-28 10:29:51,050 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 335.5MB. Free memory is still 280.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:29:51,051 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.71ms. Allocated memory is still 549.5MB. Free memory was 503.4MB in the beginning and 492.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 10:29:51,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.53ms. Allocated memory is still 549.5MB. Free memory was 492.8MB in the beginning and 490.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:29:51,051 INFO L158 Benchmark]: Boogie Preprocessor took 13.73ms. Allocated memory is still 549.5MB. Free memory was 490.9MB in the beginning and 489.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:29:51,051 INFO L158 Benchmark]: RCFGBuilder took 366.26ms. Allocated memory is still 549.5MB. Free memory was 489.8MB in the beginning and 475.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-28 10:29:51,051 INFO L158 Benchmark]: TraceAbstraction took 53500.35ms. Allocated memory was 549.5MB in the beginning and 792.7MB in the end (delta: 243.3MB). Free memory was 474.6MB in the beginning and 730.3MB in the end (delta: -255.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:29:51,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 335.5MB. Free memory is still 280.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 183.71ms. Allocated memory is still 549.5MB. Free memory was 503.4MB in the beginning and 492.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.53ms. Allocated memory is still 549.5MB. Free memory was 492.8MB in the beginning and 490.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.73ms. Allocated memory is still 549.5MB. Free memory was 490.9MB in the beginning and 489.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 366.26ms. Allocated memory is still 549.5MB. Free memory was 489.8MB in the beginning and 475.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 53500.35ms. Allocated memory was 549.5MB in the beginning and 792.7MB in the end (delta: 243.3MB). Free memory was 474.6MB in the beginning and 730.3MB in the end (delta: -255.7MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 68 TotalNumberOfCompositions, 559 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 539, independent: 535, independent conditional: 0, independent unconditional: 535, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 279, independent: 277, independent conditional: 0, independent unconditional: 277, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 539, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 279, unknown conditional: 0, unknown unconditional: 279] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 53.4s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 26.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5206 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5206 mSDsluCounter, 758 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 594 mSDsCounter, 716 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20273 IncrementalHoareTripleChecker+Invalid, 20989 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 716 mSolverCounterUnsat, 164 mSDtfsCounter, 20273 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1942 GetRequests, 544 SyntacticMatches, 51 SemanticMatches, 1347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16179 ImplicationChecksByTransitivity, 20.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4207occurred in iteration=37, InterpolantAutomatonStates: 909, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 15.0s InterpolantComputationTime, 1140 NumberOfCodeBlocks, 1140 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 1563 ConstructedInterpolants, 0 QuantifiedInterpolants, 19719 SizeOfPredicates, 138 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 879 ConjunctsInUnsatCore, 108 InterpolantComputations, 6 PerfectInterpolantSequences, 23/438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-28 10:29:51,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...