/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 19:13:15,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 19:13:15,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 19:13:15,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 19:13:15,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 19:13:15,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 19:13:15,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 19:13:15,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 19:13:15,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 19:13:15,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 19:13:15,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 19:13:15,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 19:13:15,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 19:13:15,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 19:13:15,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 19:13:15,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 19:13:15,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 19:13:15,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 19:13:15,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 19:13:15,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 19:13:15,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 19:13:15,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 19:13:15,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 19:13:15,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 19:13:15,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 19:13:15,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 19:13:15,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 19:13:15,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 19:13:15,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 19:13:15,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 19:13:15,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 19:13:15,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 19:13:15,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 19:13:15,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 19:13:15,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 19:13:15,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 19:13:15,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 19:13:15,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 19:13:15,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 19:13:15,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 19:13:15,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 19:13:15,519 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-NoLbe.epf [2022-12-05 19:13:15,546 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 19:13:15,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 19:13:15,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 19:13:15,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 19:13:15,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 19:13:15,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 19:13:15,549 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 19:13:15,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 19:13:15,549 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 19:13:15,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 19:13:15,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 19:13:15,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:13:15,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 19:13:15,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 19:13:15,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 19:13:15,552 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-05 19:13:15,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 19:13:15,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 19:13:15,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 19:13:15,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 19:13:15,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 19:13:15,856 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 19:13:15,856 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 19:13:15,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-05 19:13:16,770 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 19:13:16,961 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 19:13:16,962 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-05 19:13:16,970 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035283894/5cb56a7ffd8a4d54bfdc5b37404de080/FLAGa8aa5d5b8 [2022-12-05 19:13:16,979 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035283894/5cb56a7ffd8a4d54bfdc5b37404de080 [2022-12-05 19:13:16,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 19:13:16,982 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 19:13:16,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 19:13:16,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 19:13:16,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 19:13:16,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:13:16" (1/1) ... [2022-12-05 19:13:16,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73877b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:16, skipping insertion in model container [2022-12-05 19:13:16,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:13:16" (1/1) ... [2022-12-05 19:13:16,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 19:13:16,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 19:13:17,086 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,098 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-05 19:13:17,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:13:17,106 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 19:13:17,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:13:17,119 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:13:17,121 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-05 19:13:17,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:13:17,133 INFO L208 MainTranslator]: Completed translation [2022-12-05 19:13:17,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17 WrapperNode [2022-12-05 19:13:17,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 19:13:17,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 19:13:17,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 19:13:17,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 19:13:17,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,175 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-05 19:13:17,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 19:13:17,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 19:13:17,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 19:13:17,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 19:13:17,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,199 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 19:13:17,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 19:13:17,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 19:13:17,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 19:13:17,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (1/1) ... [2022-12-05 19:13:17,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:13:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:13:17,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 19:13:17,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 19:13:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 19:13:17,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 19:13:17,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 19:13:17,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 19:13:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 19:13:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 19:13:17,272 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 19:13:17,354 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 19:13:17,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 19:13:17,475 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 19:13:17,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 19:13:17,507 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 19:13:17,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:13:17 BoogieIcfgContainer [2022-12-05 19:13:17,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 19:13:17,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 19:13:17,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 19:13:17,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 19:13:17,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 07:13:16" (1/3) ... [2022-12-05 19:13:17,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738242a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:13:17, skipping insertion in model container [2022-12-05 19:13:17,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:13:17" (2/3) ... [2022-12-05 19:13:17,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738242a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:13:17, skipping insertion in model container [2022-12-05 19:13:17,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:13:17" (3/3) ... [2022-12-05 19:13:17,514 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-12-05 19:13:17,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 19:13:17,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 19:13:17,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 19:13:17,576 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 19:13:17,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-12-05 19:13:17,636 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2022-12-05 19:13:17,636 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:13:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-05 19:13:17,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-12-05 19:13:17,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-12-05 19:13:17,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 19:13:17,653 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;@a19b2fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 19:13:17,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 19:13:17,669 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-12-05 19:13:17,669 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:13:17,669 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:17,670 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:17,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1572774383, now seen corresponding path program 1 times [2022-12-05 19:13:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:17,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800743579] [2022-12-05 19:13:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800743579] [2022-12-05 19:13:18,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800743579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:13:18,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:13:18,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:13:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583988252] [2022-12-05 19:13:18,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:13:18,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:13:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:13:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:13:18,320 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-12-05 19:13:18,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:18,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:18,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-12-05 19:13:18,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:18,462 INFO L130 PetriNetUnfolder]: 44/152 cut-off events. [2022-12-05 19:13:18,463 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-05 19:13:18,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 152 events. 44/152 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 417 event pairs, 2 based on Foata normal form. 13/154 useless extension candidates. Maximal degree in co-relation 187. Up to 53 conditions per place. [2022-12-05 19:13:18,465 INFO L137 encePairwiseOnDemand]: 69/81 looper letters, 34 selfloop transitions, 6 changer transitions 2/83 dead transitions. [2022-12-05 19:13:18,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 271 flow [2022-12-05 19:13:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:13:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:13:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 451 transitions. [2022-12-05 19:13:18,475 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6959876543209876 [2022-12-05 19:13:18,476 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 8 states and 451 transitions. [2022-12-05 19:13:18,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 271 flow [2022-12-05 19:13:18,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 257 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:13:18,481 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 160 flow [2022-12-05 19:13:18,482 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2022-12-05 19:13:18,485 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-12-05 19:13:18,485 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 160 flow [2022-12-05 19:13:18,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:18,485 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:18,485 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:18,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 19:13:18,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1336082922, now seen corresponding path program 1 times [2022-12-05 19:13:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:18,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917832733] [2022-12-05 19:13:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917832733] [2022-12-05 19:13:18,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917832733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:13:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064532119] [2022-12-05 19:13:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:18,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:13:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:13:18,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:13:18,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 19:13:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 19:13:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:13:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:13:19,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 19:13:19,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064532119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:13:19,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 19:13:19,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-05 19:13:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560042296] [2022-12-05 19:13:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:13:19,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:13:19,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:13:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-05 19:13:19,204 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 81 [2022-12-05 19:13:19,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:19,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:19,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 81 [2022-12-05 19:13:19,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:19,416 INFO L130 PetriNetUnfolder]: 52/187 cut-off events. [2022-12-05 19:13:19,417 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-05 19:13:19,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 187 events. 52/187 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 528 event pairs, 10 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 173. Up to 76 conditions per place. [2022-12-05 19:13:19,419 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 35 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2022-12-05 19:13:19,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 286 flow [2022-12-05 19:13:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:13:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:13:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 372 transitions. [2022-12-05 19:13:19,424 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.656084656084656 [2022-12-05 19:13:19,424 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 160 flow. Second operand 7 states and 372 transitions. [2022-12-05 19:13:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 286 flow [2022-12-05 19:13:19,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:13:19,428 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 205 flow [2022-12-05 19:13:19,428 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2022-12-05 19:13:19,429 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2022-12-05 19:13:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 205 flow [2022-12-05 19:13:19,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:19,429 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:19,429 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:19,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 19:13:19,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:13:19,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash -535529180, now seen corresponding path program 2 times [2022-12-05 19:13:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:19,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316963257] [2022-12-05 19:13:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316963257] [2022-12-05 19:13:19,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316963257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:13:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319417167] [2022-12-05 19:13:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:13:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:13:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:13:19,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:13:19,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 19:13:20,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:13:20,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:13:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 19:13:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:13:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:20,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 19:13:20,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319417167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:13:20,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 19:13:20,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-12-05 19:13:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529780600] [2022-12-05 19:13:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:13:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 19:13:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 19:13:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-05 19:13:20,191 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 81 [2022-12-05 19:13:20,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 48.25) internal successors, (386), 8 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:20,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:20,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 81 [2022-12-05 19:13:20,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:20,460 INFO L130 PetriNetUnfolder]: 99/271 cut-off events. [2022-12-05 19:13:20,460 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2022-12-05 19:13:20,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 271 events. 99/271 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 948 event pairs, 31 based on Foata normal form. 6/273 useless extension candidates. Maximal degree in co-relation 286. Up to 142 conditions per place. [2022-12-05 19:13:20,465 INFO L137 encePairwiseOnDemand]: 71/81 looper letters, 51 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2022-12-05 19:13:20,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 446 flow [2022-12-05 19:13:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 19:13:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 19:13:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 512 transitions. [2022-12-05 19:13:20,467 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6320987654320988 [2022-12-05 19:13:20,467 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 205 flow. Second operand 10 states and 512 transitions. [2022-12-05 19:13:20,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 446 flow [2022-12-05 19:13:20,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 437 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 19:13:20,471 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 279 flow [2022-12-05 19:13:20,471 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=279, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2022-12-05 19:13:20,472 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 17 predicate places. [2022-12-05 19:13:20,472 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 279 flow [2022-12-05 19:13:20,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.25) internal successors, (386), 8 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:20,473 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:20,473 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:20,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 19:13:20,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-05 19:13:20,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2111078510, now seen corresponding path program 3 times [2022-12-05 19:13:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:20,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050911420] [2022-12-05 19:13:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:20,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:20,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050911420] [2022-12-05 19:13:20,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050911420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:13:20,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:13:20,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:13:20,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506327168] [2022-12-05 19:13:20,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:13:20,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:13:20,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:20,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:13:20,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:13:20,860 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-05 19:13:20,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:20,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:20,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-05 19:13:20,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:20,978 INFO L130 PetriNetUnfolder]: 176/516 cut-off events. [2022-12-05 19:13:20,979 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2022-12-05 19:13:20,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 516 events. 176/516 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2593 event pairs, 21 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 1031. Up to 154 conditions per place. [2022-12-05 19:13:20,982 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 56 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2022-12-05 19:13:20,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 615 flow [2022-12-05 19:13:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:13:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:13:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 456 transitions. [2022-12-05 19:13:20,983 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8042328042328042 [2022-12-05 19:13:20,983 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 279 flow. Second operand 7 states and 456 transitions. [2022-12-05 19:13:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 615 flow [2022-12-05 19:13:20,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 122 transitions, 602 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:13:20,987 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 427 flow [2022-12-05 19:13:20,987 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2022-12-05 19:13:20,988 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 24 predicate places. [2022-12-05 19:13:20,988 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 427 flow [2022-12-05 19:13:20,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:20,988 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:20,988 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:20,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 19:13:20,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1297629234, now seen corresponding path program 4 times [2022-12-05 19:13:20,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:20,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717527400] [2022-12-05 19:13:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:20,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:21,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717527400] [2022-12-05 19:13:21,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717527400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:13:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534470833] [2022-12-05 19:13:21,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:13:21,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:13:21,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:13:21,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:13:21,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 19:13:21,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:13:21,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:13:21,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 19:13:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:13:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:22,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:13:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:22,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534470833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:13:22,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:13:22,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 31 [2022-12-05 19:13:22,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000252190] [2022-12-05 19:13:22,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:13:22,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 19:13:22,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 19:13:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-12-05 19:13:22,893 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:13:22,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 427 flow. Second operand has 31 states, 31 states have (on average 44.25806451612903) internal successors, (1372), 31 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:22,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:22,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:13:22,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:26,214 INFO L130 PetriNetUnfolder]: 777/2387 cut-off events. [2022-12-05 19:13:26,214 INFO L131 PetriNetUnfolder]: For 4367/4367 co-relation queries the response was YES. [2022-12-05 19:13:26,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2387 events. 777/2387 cut-off events. For 4367/4367 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20721 event pairs, 104 based on Foata normal form. 17/2371 useless extension candidates. Maximal degree in co-relation 4982. Up to 453 conditions per place. [2022-12-05 19:13:26,226 INFO L137 encePairwiseOnDemand]: 61/81 looper letters, 233 selfloop transitions, 147 changer transitions 113/526 dead transitions. [2022-12-05 19:13:26,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 526 transitions, 4084 flow [2022-12-05 19:13:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-05 19:13:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-12-05 19:13:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 3656 transitions. [2022-12-05 19:13:26,233 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5786641342196898 [2022-12-05 19:13:26,233 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 427 flow. Second operand 78 states and 3656 transitions. [2022-12-05 19:13:26,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 526 transitions, 4084 flow [2022-12-05 19:13:26,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 526 transitions, 4008 flow, removed 38 selfloop flow, removed 0 redundant places. [2022-12-05 19:13:26,250 INFO L231 Difference]: Finished difference. Result has 230 places, 238 transitions, 2061 flow [2022-12-05 19:13:26,250 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2061, PETRI_PLACES=230, PETRI_TRANSITIONS=238} [2022-12-05 19:13:26,251 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 158 predicate places. [2022-12-05 19:13:26,251 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 238 transitions, 2061 flow [2022-12-05 19:13:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 44.25806451612903) internal successors, (1372), 31 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:26,252 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:26,252 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:26,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-05 19:13:26,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:13:26,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2118278973, now seen corresponding path program 1 times [2022-12-05 19:13:26,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:26,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24418234] [2022-12-05 19:13:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:26,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:26,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24418234] [2022-12-05 19:13:26,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24418234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:13:26,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:13:26,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:13:26,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094190917] [2022-12-05 19:13:26,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:13:26,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:13:26,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:13:26,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:13:26,676 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-05 19:13:26,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 238 transitions, 2061 flow. Second operand has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:26,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:26,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-05 19:13:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:27,055 INFO L130 PetriNetUnfolder]: 616/1786 cut-off events. [2022-12-05 19:13:27,055 INFO L131 PetriNetUnfolder]: For 28006/28006 co-relation queries the response was YES. [2022-12-05 19:13:27,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 1786 events. 616/1786 cut-off events. For 28006/28006 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13368 event pairs, 61 based on Foata normal form. 15/1790 useless extension candidates. Maximal degree in co-relation 8961. Up to 489 conditions per place. [2022-12-05 19:13:27,072 INFO L137 encePairwiseOnDemand]: 75/81 looper letters, 223 selfloop transitions, 105 changer transitions 0/374 dead transitions. [2022-12-05 19:13:27,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 374 transitions, 4019 flow [2022-12-05 19:13:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 19:13:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 19:13:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 579 transitions. [2022-12-05 19:13:27,074 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7942386831275721 [2022-12-05 19:13:27,074 INFO L175 Difference]: Start difference. First operand has 230 places, 238 transitions, 2061 flow. Second operand 9 states and 579 transitions. [2022-12-05 19:13:27,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 374 transitions, 4019 flow [2022-12-05 19:13:27,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 374 transitions, 3530 flow, removed 231 selfloop flow, removed 28 redundant places. [2022-12-05 19:13:27,139 INFO L231 Difference]: Finished difference. Result has 196 places, 270 transitions, 2510 flow [2022-12-05 19:13:27,140 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2510, PETRI_PLACES=196, PETRI_TRANSITIONS=270} [2022-12-05 19:13:27,142 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 124 predicate places. [2022-12-05 19:13:27,145 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 270 transitions, 2510 flow [2022-12-05 19:13:27,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:27,146 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:27,146 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 19:13:27,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1854028487, now seen corresponding path program 5 times [2022-12-05 19:13:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405095643] [2022-12-05 19:13:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 19:13:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405095643] [2022-12-05 19:13:27,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405095643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:13:27,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:13:27,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:13:27,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820384074] [2022-12-05 19:13:27,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:13:27,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:13:27,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:27,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:13:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:13:27,302 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-05 19:13:27,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 270 transitions, 2510 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:27,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:27,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-05 19:13:27,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:13:27,573 INFO L130 PetriNetUnfolder]: 611/1663 cut-off events. [2022-12-05 19:13:27,573 INFO L131 PetriNetUnfolder]: For 28482/28482 co-relation queries the response was YES. [2022-12-05 19:13:27,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9006 conditions, 1663 events. 611/1663 cut-off events. For 28482/28482 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11973 event pairs, 80 based on Foata normal form. 10/1658 useless extension candidates. Maximal degree in co-relation 8208. Up to 708 conditions per place. [2022-12-05 19:13:27,588 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 213 selfloop transitions, 85 changer transitions 0/344 dead transitions. [2022-12-05 19:13:27,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 344 transitions, 3733 flow [2022-12-05 19:13:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:13:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:13:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 445 transitions. [2022-12-05 19:13:27,590 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7848324514991182 [2022-12-05 19:13:27,590 INFO L175 Difference]: Start difference. First operand has 196 places, 270 transitions, 2510 flow. Second operand 7 states and 445 transitions. [2022-12-05 19:13:27,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 344 transitions, 3733 flow [2022-12-05 19:13:27,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 344 transitions, 3525 flow, removed 64 selfloop flow, removed 1 redundant places. [2022-12-05 19:13:27,661 INFO L231 Difference]: Finished difference. Result has 205 places, 281 transitions, 2782 flow [2022-12-05 19:13:27,661 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2782, PETRI_PLACES=205, PETRI_TRANSITIONS=281} [2022-12-05 19:13:27,662 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 133 predicate places. [2022-12-05 19:13:27,662 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 281 transitions, 2782 flow [2022-12-05 19:13:27,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:27,662 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:13:27,662 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:13:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 19:13:27,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:13:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:13:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1043390002, now seen corresponding path program 2 times [2022-12-05 19:13:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:13:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968081374] [2022-12-05 19:13:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:13:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:13:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:13:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:28,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:13:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968081374] [2022-12-05 19:13:28,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968081374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:13:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478615257] [2022-12-05 19:13:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:13:28,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:13:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:13:28,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:13:28,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 19:13:28,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:13:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:13:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 19:13:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:13:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:29,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:13:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:13:30,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478615257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:13:30,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:13:30,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-12-05 19:13:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075150386] [2022-12-05 19:13:30,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:13:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-05 19:13:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:13:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-05 19:13:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-12-05 19:13:30,931 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:13:30,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 281 transitions, 2782 flow. Second operand has 40 states, 40 states have (on average 44.125) internal successors, (1765), 40 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:13:30,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:13:30,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:13:30,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:14:00,976 INFO L130 PetriNetUnfolder]: 1306/3797 cut-off events. [2022-12-05 19:14:00,976 INFO L131 PetriNetUnfolder]: For 60677/60677 co-relation queries the response was YES. [2022-12-05 19:14:01,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19248 conditions, 3797 events. 1306/3797 cut-off events. For 60677/60677 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35023 event pairs, 68 based on Foata normal form. 16/3796 useless extension candidates. Maximal degree in co-relation 18851. Up to 572 conditions per place. [2022-12-05 19:14:01,026 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 456 selfloop transitions, 440 changer transitions 214/1143 dead transitions. [2022-12-05 19:14:01,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1143 transitions, 14691 flow [2022-12-05 19:14:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-12-05 19:14:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2022-12-05 19:14:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 7575 transitions. [2022-12-05 19:14:01,074 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5633645693886657 [2022-12-05 19:14:01,074 INFO L175 Difference]: Start difference. First operand has 205 places, 281 transitions, 2782 flow. Second operand 166 states and 7575 transitions. [2022-12-05 19:14:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1143 transitions, 14691 flow [2022-12-05 19:14:01,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1143 transitions, 14377 flow, removed 156 selfloop flow, removed 1 redundant places. [2022-12-05 19:14:01,241 INFO L231 Difference]: Finished difference. Result has 449 places, 648 transitions, 8796 flow [2022-12-05 19:14:01,242 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=166, PETRI_FLOW=8796, PETRI_PLACES=449, PETRI_TRANSITIONS=648} [2022-12-05 19:14:01,242 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 377 predicate places. [2022-12-05 19:14:01,242 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 648 transitions, 8796 flow [2022-12-05 19:14:01,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 44.125) internal successors, (1765), 40 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:14:01,243 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:14:01,243 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:14:01,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 19:14:01,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:14:01,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:14:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:14:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2091099358, now seen corresponding path program 3 times [2022-12-05 19:14:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:14:01,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716144876] [2022-12-05 19:14:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:14:01,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:14:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:14:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:14:02,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:14:02,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716144876] [2022-12-05 19:14:02,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716144876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:14:02,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731054520] [2022-12-05 19:14:02,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:14:02,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:14:02,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:14:02,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:14:02,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 19:14:02,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 19:14:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:14:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 19:14:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:14:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:14:03,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:14:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:14:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731054520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:14:05,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:14:05,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 18] total 42 [2022-12-05 19:14:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258044676] [2022-12-05 19:14:05,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:14:05,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-05 19:14:05,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:14:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-05 19:14:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2022-12-05 19:14:05,078 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 81 [2022-12-05 19:14:05,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 648 transitions, 8796 flow. Second operand has 42 states, 42 states have (on average 45.95238095238095) internal successors, (1930), 42 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:14:05,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:14:05,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 81 [2022-12-05 19:14:05,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:14:30,275 INFO L130 PetriNetUnfolder]: 1277/3912 cut-off events. [2022-12-05 19:14:30,275 INFO L131 PetriNetUnfolder]: For 78273/78488 co-relation queries the response was YES. [2022-12-05 19:14:30,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25756 conditions, 3912 events. 1277/3912 cut-off events. For 78273/78488 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 36608 event pairs, 39 based on Foata normal form. 36/3921 useless extension candidates. Maximal degree in co-relation 25540. Up to 816 conditions per place. [2022-12-05 19:14:30,320 INFO L137 encePairwiseOnDemand]: 63/81 looper letters, 534 selfloop transitions, 452 changer transitions 158/1242 dead transitions. [2022-12-05 19:14:30,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1242 transitions, 19556 flow [2022-12-05 19:14:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-05 19:14:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-12-05 19:14:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5103 transitions. [2022-12-05 19:14:30,324 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5887850467289719 [2022-12-05 19:14:30,324 INFO L175 Difference]: Start difference. First operand has 449 places, 648 transitions, 8796 flow. Second operand 107 states and 5103 transitions. [2022-12-05 19:14:30,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1242 transitions, 19556 flow [2022-12-05 19:14:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1242 transitions, 16590 flow, removed 1435 selfloop flow, removed 63 redundant places. [2022-12-05 19:14:30,711 INFO L231 Difference]: Finished difference. Result has 489 places, 854 transitions, 11683 flow [2022-12-05 19:14:30,712 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=7377, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=11683, PETRI_PLACES=489, PETRI_TRANSITIONS=854} [2022-12-05 19:14:30,713 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 417 predicate places. [2022-12-05 19:14:30,713 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 854 transitions, 11683 flow [2022-12-05 19:14:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 45.95238095238095) internal successors, (1930), 42 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:14:30,714 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:14:30,714 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:14:30,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-05 19:14:30,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:14:30,918 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:14:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:14:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash 781020052, now seen corresponding path program 4 times [2022-12-05 19:14:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:14:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328393107] [2022-12-05 19:14:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:14:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:14:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:14:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:14:31,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:14:31,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328393107] [2022-12-05 19:14:31,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328393107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:14:31,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145385204] [2022-12-05 19:14:31,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:14:31,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:14:31,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:14:31,820 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:14:31,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 19:14:31,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:14:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:14:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 19:14:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:14:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:14:33,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:14:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:14:34,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145385204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:14:34,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:14:34,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18] total 43 [2022-12-05 19:14:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479884991] [2022-12-05 19:14:34,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:14:34,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-05 19:14:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:14:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-05 19:14:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2022-12-05 19:14:34,857 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:14:34,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 854 transitions, 11683 flow. Second operand has 43 states, 43 states have (on average 44.04651162790697) internal successors, (1894), 43 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:14:34,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:14:34,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:14:34,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:14:45,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 19:15:05,139 INFO L130 PetriNetUnfolder]: 1981/5504 cut-off events. [2022-12-05 19:15:05,140 INFO L131 PetriNetUnfolder]: For 103473/103473 co-relation queries the response was YES. [2022-12-05 19:15:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37570 conditions, 5504 events. 1981/5504 cut-off events. For 103473/103473 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 53344 event pairs, 91 based on Foata normal form. 13/5501 useless extension candidates. Maximal degree in co-relation 37295. Up to 1486 conditions per place. [2022-12-05 19:15:05,226 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 765 selfloop transitions, 568 changer transitions 164/1530 dead transitions. [2022-12-05 19:15:05,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1530 transitions, 24970 flow [2022-12-05 19:15:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-12-05 19:15:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2022-12-05 19:15:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 5724 transitions. [2022-12-05 19:15:05,231 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5653333333333334 [2022-12-05 19:15:05,232 INFO L175 Difference]: Start difference. First operand has 489 places, 854 transitions, 11683 flow. Second operand 125 states and 5724 transitions. [2022-12-05 19:15:05,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1530 transitions, 24970 flow [2022-12-05 19:15:05,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1530 transitions, 23277 flow, removed 787 selfloop flow, removed 51 redundant places. [2022-12-05 19:15:05,818 INFO L231 Difference]: Finished difference. Result has 582 places, 1086 transitions, 16391 flow [2022-12-05 19:15:05,819 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11022, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=16391, PETRI_PLACES=582, PETRI_TRANSITIONS=1086} [2022-12-05 19:15:05,819 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 510 predicate places. [2022-12-05 19:15:05,819 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 1086 transitions, 16391 flow [2022-12-05 19:15:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 44.04651162790697) internal successors, (1894), 43 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:15:05,820 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:15:05,820 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:15:05,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 19:15:06,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:15:06,025 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:15:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:15:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1869260354, now seen corresponding path program 5 times [2022-12-05 19:15:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:15:06,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733455577] [2022-12-05 19:15:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:15:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:15:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:15:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:15:06,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:15:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733455577] [2022-12-05 19:15:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733455577] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:15:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962480875] [2022-12-05 19:15:06,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:15:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:15:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:15:06,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 19:15:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 19:15:07,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 19:15:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:15:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 19:15:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:15:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:15:08,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:15:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:15:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962480875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:15:12,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:15:12,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 43 [2022-12-05 19:15:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669202773] [2022-12-05 19:15:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:15:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-05 19:15:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:15:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-05 19:15:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2022-12-05 19:15:12,159 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:15:12,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1086 transitions, 16391 flow. Second operand has 43 states, 43 states have (on average 43.883720930232556) internal successors, (1887), 43 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:15:12,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:15:12,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:15:12,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:16:07,766 INFO L130 PetriNetUnfolder]: 2478/6695 cut-off events. [2022-12-05 19:16:07,766 INFO L131 PetriNetUnfolder]: For 152847/152847 co-relation queries the response was YES. [2022-12-05 19:16:07,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51147 conditions, 6695 events. 2478/6695 cut-off events. For 152847/152847 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 65517 event pairs, 55 based on Foata normal form. 12/6689 useless extension candidates. Maximal degree in co-relation 50871. Up to 1425 conditions per place. [2022-12-05 19:16:07,856 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 841 selfloop transitions, 1071 changer transitions 125/2070 dead transitions. [2022-12-05 19:16:07,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 2070 transitions, 37158 flow [2022-12-05 19:16:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-12-05 19:16:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-12-05 19:16:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 5780 transitions. [2022-12-05 19:16:07,860 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5663335292964923 [2022-12-05 19:16:07,860 INFO L175 Difference]: Start difference. First operand has 582 places, 1086 transitions, 16391 flow. Second operand 126 states and 5780 transitions. [2022-12-05 19:16:07,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 2070 transitions, 37158 flow [2022-12-05 19:16:08,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 2070 transitions, 35189 flow, removed 859 selfloop flow, removed 70 redundant places. [2022-12-05 19:16:08,787 INFO L231 Difference]: Finished difference. Result has 659 places, 1623 transitions, 28816 flow [2022-12-05 19:16:08,788 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=15554, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=28816, PETRI_PLACES=659, PETRI_TRANSITIONS=1623} [2022-12-05 19:16:08,789 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 587 predicate places. [2022-12-05 19:16:08,789 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 1623 transitions, 28816 flow [2022-12-05 19:16:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 43.883720930232556) internal successors, (1887), 43 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:16:08,790 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:16:08,790 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:16:08,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 19:16:08,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:16:08,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:16:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:16:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1399236666, now seen corresponding path program 6 times [2022-12-05 19:16:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:16:09,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525463480] [2022-12-05 19:16:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:16:09,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:16:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:16:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:16:10,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:16:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525463480] [2022-12-05 19:16:10,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525463480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:16:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456359944] [2022-12-05 19:16:10,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:16:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:16:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:16:10,120 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) [2022-12-05 19:16:10,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 19:16:10,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 19:16:10,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:16:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 19:16:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:16:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:16:11,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:16:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:16:13,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456359944] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:16:13,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:16:13,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 35 [2022-12-05 19:16:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141754870] [2022-12-05 19:16:13,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:16:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 19:16:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:16:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 19:16:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 19:16:13,525 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:16:13,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1623 transitions, 28816 flow. Second operand has 35 states, 35 states have (on average 44.285714285714285) internal successors, (1550), 35 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:16:13,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:16:13,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:16:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:16:19,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 19:17:32,247 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 188 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-05 19:18:17,274 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 169 DAG size of output: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-05 19:20:34,074 INFO L130 PetriNetUnfolder]: 4037/11289 cut-off events. [2022-12-05 19:20:34,075 INFO L131 PetriNetUnfolder]: For 343876/343876 co-relation queries the response was YES. [2022-12-05 19:20:34,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95882 conditions, 11289 events. 4037/11289 cut-off events. For 343876/343876 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 121308 event pairs, 150 based on Foata normal form. 37/11264 useless extension candidates. Maximal degree in co-relation 95545. Up to 2158 conditions per place. [2022-12-05 19:20:34,274 INFO L137 encePairwiseOnDemand]: 60/81 looper letters, 1504 selfloop transitions, 1796 changer transitions 571/3904 dead transitions. [2022-12-05 19:20:34,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 3904 transitions, 80860 flow [2022-12-05 19:20:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2022-12-05 19:20:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2022-12-05 19:20:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 14579 transitions. [2022-12-05 19:20:34,283 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5607092034921733 [2022-12-05 19:20:34,283 INFO L175 Difference]: Start difference. First operand has 659 places, 1623 transitions, 28816 flow. Second operand 321 states and 14579 transitions. [2022-12-05 19:20:34,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 3904 transitions, 80860 flow [2022-12-05 19:20:37,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 885 places, 3904 transitions, 74730 flow, removed 2802 selfloop flow, removed 66 redundant places. [2022-12-05 19:20:37,462 INFO L231 Difference]: Finished difference. Result has 1120 places, 2730 transitions, 56068 flow [2022-12-05 19:20:37,464 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=27219, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=321, PETRI_FLOW=56068, PETRI_PLACES=1120, PETRI_TRANSITIONS=2730} [2022-12-05 19:20:37,466 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 1048 predicate places. [2022-12-05 19:20:37,466 INFO L495 AbstractCegarLoop]: Abstraction has has 1120 places, 2730 transitions, 56068 flow [2022-12-05 19:20:37,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 44.285714285714285) internal successors, (1550), 35 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:20:37,466 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:20:37,466 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:20:37,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 19:20:37,671 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,SelfDestructingSolverStorable11 [2022-12-05 19:20:37,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:20:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:20:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 101340709, now seen corresponding path program 7 times [2022-12-05 19:20:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:20:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536019815] [2022-12-05 19:20:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:20:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:20:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:20:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:20:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:20:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536019815] [2022-12-05 19:20:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536019815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:20:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046578968] [2022-12-05 19:20:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:20:39,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:20:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:20:39,032 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) [2022-12-05 19:20:39,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 19:20:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:20:39,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-05 19:20:39,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:20:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:20:40,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:20:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:20:42,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046578968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:20:42,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:20:42,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 41 [2022-12-05 19:20:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930560241] [2022-12-05 19:20:42,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:20:42,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-05 19:20:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:20:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-05 19:20:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-12-05 19:20:42,015 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:20:42,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1120 places, 2730 transitions, 56068 flow. Second operand has 41 states, 41 states have (on average 44.4390243902439) internal successors, (1822), 41 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:20:42,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:20:42,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:20:42,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:21:33,796 INFO L130 PetriNetUnfolder]: 5092/13670 cut-off events. [2022-12-05 19:21:33,796 INFO L131 PetriNetUnfolder]: For 1034763/1034763 co-relation queries the response was YES. [2022-12-05 19:21:34,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157916 conditions, 13670 events. 5092/13670 cut-off events. For 1034763/1034763 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 148715 event pairs, 221 based on Foata normal form. 16/13618 useless extension candidates. Maximal degree in co-relation 157476. Up to 2508 conditions per place. [2022-12-05 19:21:34,206 INFO L137 encePairwiseOnDemand]: 60/81 looper letters, 1843 selfloop transitions, 2414 changer transitions 291/4581 dead transitions. [2022-12-05 19:21:34,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 4581 transitions, 115955 flow [2022-12-05 19:21:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-12-05 19:21:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2022-12-05 19:21:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 8140 transitions. [2022-12-05 19:21:34,211 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5709876543209876 [2022-12-05 19:21:34,212 INFO L175 Difference]: Start difference. First operand has 1120 places, 2730 transitions, 56068 flow. Second operand 176 states and 8140 transitions. [2022-12-05 19:21:34,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 4581 transitions, 115955 flow [2022-12-05 19:21:45,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1040 places, 4581 transitions, 105465 flow, removed 5200 selfloop flow, removed 128 redundant places. [2022-12-05 19:21:45,698 INFO L231 Difference]: Finished difference. Result has 1137 places, 3628 transitions, 79895 flow [2022-12-05 19:21:45,701 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=51092, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=176, PETRI_FLOW=79895, PETRI_PLACES=1137, PETRI_TRANSITIONS=3628} [2022-12-05 19:21:45,701 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 1065 predicate places. [2022-12-05 19:21:45,701 INFO L495 AbstractCegarLoop]: Abstraction has has 1137 places, 3628 transitions, 79895 flow [2022-12-05 19:21:45,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 44.4390243902439) internal successors, (1822), 41 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:21:45,702 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:21:45,702 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:21:45,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 19:21:45,906 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,SelfDestructingSolverStorable12 [2022-12-05 19:21:45,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:21:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:21:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash 744844509, now seen corresponding path program 8 times [2022-12-05 19:21:45,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:21:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657836071] [2022-12-05 19:21:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:21:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:21:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:21:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:21:46,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:21:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657836071] [2022-12-05 19:21:46,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657836071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:21:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469332865] [2022-12-05 19:21:46,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:21:46,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:21:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:21:46,984 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) [2022-12-05 19:21:46,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 19:21:47,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:21:47,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:21:47,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-05 19:21:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:21:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:21:48,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:21:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:21:50,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469332865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:21:50,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:21:50,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 46 [2022-12-05 19:21:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121380116] [2022-12-05 19:21:50,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:21:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-05 19:21:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:21:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-05 19:21:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1776, Unknown=0, NotChecked=0, Total=2070 [2022-12-05 19:21:50,461 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:21:50,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 3628 transitions, 79895 flow. Second operand has 46 states, 46 states have (on average 44.108695652173914) internal successors, (2029), 46 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:21:50,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:21:50,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:21:50,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:23:01,572 INFO L130 PetriNetUnfolder]: 5991/16122 cut-off events. [2022-12-05 19:23:01,573 INFO L131 PetriNetUnfolder]: For 1101888/1101888 co-relation queries the response was YES. [2022-12-05 19:23:01,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185502 conditions, 16122 events. 5991/16122 cut-off events. For 1101888/1101888 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 180581 event pairs, 288 based on Foata normal form. 14/16040 useless extension candidates. Maximal degree in co-relation 185050. Up to 3060 conditions per place. [2022-12-05 19:23:02,001 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 1995 selfloop transitions, 2910 changer transitions 255/5193 dead transitions. [2022-12-05 19:23:02,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1270 places, 5193 transitions, 135040 flow [2022-12-05 19:23:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-12-05 19:23:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2022-12-05 19:23:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 8414 transitions. [2022-12-05 19:23:02,006 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5676313836605276 [2022-12-05 19:23:02,006 INFO L175 Difference]: Start difference. First operand has 1137 places, 3628 transitions, 79895 flow. Second operand 183 states and 8414 transitions. [2022-12-05 19:23:02,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1270 places, 5193 transitions, 135040 flow [2022-12-05 19:23:17,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1191 places, 5193 transitions, 130404 flow, removed 2078 selfloop flow, removed 79 redundant places. [2022-12-05 19:23:17,821 INFO L231 Difference]: Finished difference. Result has 1282 places, 4332 transitions, 104405 flow [2022-12-05 19:23:17,824 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=76922, PETRI_DIFFERENCE_MINUEND_PLACES=1009, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=183, PETRI_FLOW=104405, PETRI_PLACES=1282, PETRI_TRANSITIONS=4332} [2022-12-05 19:23:17,825 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 1210 predicate places. [2022-12-05 19:23:17,825 INFO L495 AbstractCegarLoop]: Abstraction has has 1282 places, 4332 transitions, 104405 flow [2022-12-05 19:23:17,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 44.108695652173914) internal successors, (2029), 46 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:23:17,825 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:23:17,825 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:23:17,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 19:23:18,030 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,SelfDestructingSolverStorable13 [2022-12-05 19:23:18,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:23:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:23:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1432043297, now seen corresponding path program 9 times [2022-12-05 19:23:18,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:23:18,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503526734] [2022-12-05 19:23:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:23:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:23:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:23:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:23:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:23:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503526734] [2022-12-05 19:23:18,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503526734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:23:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285344786] [2022-12-05 19:23:18,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:23:18,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:23:18,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:23:18,178 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) [2022-12-05 19:23:18,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 19:23:18,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 19:23:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:23:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 19:23:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:23:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 19:23:18,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:23:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 19:23:18,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285344786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:23:18,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:23:18,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 7] total 18 [2022-12-05 19:23:18,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876463169] [2022-12-05 19:23:18,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:23:18,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:23:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:23:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:23:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:23:18,586 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 81 [2022-12-05 19:23:18,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1282 places, 4332 transitions, 104405 flow. Second operand has 18 states, 18 states have (on average 48.77777777777778) internal successors, (878), 18 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:23:18,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:23:18,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 81 [2022-12-05 19:23:18,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:23:38,588 INFO L130 PetriNetUnfolder]: 5006/12191 cut-off events. [2022-12-05 19:23:38,589 INFO L131 PetriNetUnfolder]: For 1098688/1098688 co-relation queries the response was YES. [2022-12-05 19:23:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164644 conditions, 12191 events. 5006/12191 cut-off events. For 1098688/1098688 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 118897 event pairs, 34 based on Foata normal form. 251/12429 useless extension candidates. Maximal degree in co-relation 164215. Up to 3905 conditions per place. [2022-12-05 19:23:39,016 INFO L137 encePairwiseOnDemand]: 67/81 looper letters, 3765 selfloop transitions, 1433 changer transitions 0/5234 dead transitions. [2022-12-05 19:23:39,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1242 places, 5234 transitions, 140079 flow [2022-12-05 19:23:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 19:23:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 19:23:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 888 transitions. [2022-12-05 19:23:39,017 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6090534979423868 [2022-12-05 19:23:39,017 INFO L175 Difference]: Start difference. First operand has 1282 places, 4332 transitions, 104405 flow. Second operand 18 states and 888 transitions. [2022-12-05 19:23:39,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1242 places, 5234 transitions, 140079 flow [2022-12-05 19:23:55,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1122 places, 5234 transitions, 133170 flow, removed 1258 selfloop flow, removed 120 redundant places. [2022-12-05 19:23:55,453 INFO L231 Difference]: Finished difference. Result has 1129 places, 4450 transitions, 106401 flow [2022-12-05 19:23:55,456 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=92241, PETRI_DIFFERENCE_MINUEND_PLACES=1105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=106401, PETRI_PLACES=1129, PETRI_TRANSITIONS=4450} [2022-12-05 19:23:55,457 INFO L294 CegarLoopForPetriNet]: 72 programPoint places, 1057 predicate places. [2022-12-05 19:23:55,457 INFO L495 AbstractCegarLoop]: Abstraction has has 1129 places, 4450 transitions, 106401 flow [2022-12-05 19:23:55,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 48.77777777777778) internal successors, (878), 18 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:23:55,458 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:23:55,458 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:23:55,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 19:23:55,664 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,SelfDestructingSolverStorable14 [2022-12-05 19:23:55,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:23:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:23:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1690259945, now seen corresponding path program 10 times [2022-12-05 19:23:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:23:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614583197] [2022-12-05 19:23:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:23:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:23:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:23:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:23:56,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:23:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614583197] [2022-12-05 19:23:56,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614583197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:23:56,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084315579] [2022-12-05 19:23:56,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:23:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:23:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:23:56,871 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) [2022-12-05 19:23:56,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 19:23:56,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:23:56,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:23:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-05 19:23:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:23:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:23:59,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:24:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:24:02,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084315579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:24:02,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:24:02,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 21] total 53 [2022-12-05 19:24:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484482116] [2022-12-05 19:24:02,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:24:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-05 19:24:02,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:24:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-05 19:24:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2288, Unknown=0, NotChecked=0, Total=2756 [2022-12-05 19:24:02,333 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-05 19:24:02,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1129 places, 4450 transitions, 106401 flow. Second operand has 53 states, 53 states have (on average 43.84905660377358) internal successors, (2324), 53 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 19:24:02,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:24:02,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-05 19:24:02,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:24:38,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2022-12-05 19:26:55,564 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 19:26:55,571 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 19:26:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-12-05 19:26:55,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 19:26:55,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 19:26:55,774 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,SelfDestructingSolverStorable15 [2022-12-05 19:26:55,775 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 222 known predicates. [2022-12-05 19:26:55,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 19:26:55,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 19:26:55,777 INFO L458 BasicCegarLoop]: Path program histogram: [10, 5, 1] [2022-12-05 19:26:55,779 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 19:26:55,779 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 19:26:55,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 07:26:55 BasicIcfg [2022-12-05 19:26:55,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 19:26:55,784 INFO L158 Benchmark]: Toolchain (without parser) took 818802.70ms. Allocated memory was 179.3MB in the beginning and 5.3GB in the end (delta: 5.1GB). Free memory was 155.3MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-05 19:26:55,784 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 156.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 19:26:55,785 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.20ms. Allocated memory is still 179.3MB. Free memory was 155.3MB in the beginning and 142.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 19:26:55,785 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.07ms. Allocated memory is still 179.3MB. Free memory was 142.3MB in the beginning and 140.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 19:26:55,785 INFO L158 Benchmark]: Boogie Preprocessor took 25.53ms. Allocated memory is still 179.3MB. Free memory was 140.7MB in the beginning and 139.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 19:26:55,785 INFO L158 Benchmark]: RCFGBuilder took 307.12ms. Allocated memory is still 179.3MB. Free memory was 139.6MB in the beginning and 124.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-12-05 19:26:55,785 INFO L158 Benchmark]: TraceAbstraction took 818273.86ms. Allocated memory was 179.3MB in the beginning and 5.3GB in the end (delta: 5.1GB). Free memory was 123.9MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-05 19:26:55,786 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 156.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 151.20ms. Allocated memory is still 179.3MB. Free memory was 155.3MB in the beginning and 142.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.07ms. Allocated memory is still 179.3MB. Free memory was 142.3MB in the beginning and 140.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.53ms. Allocated memory is still 179.3MB. Free memory was 140.7MB in the beginning and 139.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 307.12ms. Allocated memory is still 179.3MB. Free memory was 139.6MB in the beginning and 124.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 818273.86ms. Allocated memory was 179.3MB in the beginning and 5.3GB in the end (delta: 5.1GB). Free memory was 123.9MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 222 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 222 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 222 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 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: 818.2s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 773.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 7867 SdHoareTripleChecker+Valid, 78.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7867 mSDsluCounter, 5940 SdHoareTripleChecker+Invalid, 74.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5567 mSDsCounter, 1591 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25391 IncrementalHoareTripleChecker+Invalid, 26984 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1591 mSolverCounterUnsat, 373 mSDtfsCounter, 25391 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3036 GetRequests, 1299 SyntacticMatches, 8 SemanticMatches, 1728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132871 ImplicationChecksByTransitivity, 571.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106401occurred in iteration=15, InterpolantAutomatonStates: 1348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 40.0s InterpolantComputationTime, 1885 NumberOfCodeBlocks, 1881 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2540 ConstructedInterpolants, 11 QuantifiedInterpolants, 54429 SizeOfPredicates, 159 NumberOfNonLiveVariables, 1926 ConjunctsInSsa, 321 ConjunctsInUnsatCore, 38 InterpolantComputations, 6 PerfectInterpolantSequences, 50/271 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown