/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-threaded-sum-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 19:39:07,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 19:39:07,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 19:39:07,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 19:39:07,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 19:39:07,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 19:39:07,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 19:39:07,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 19:39:07,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 19:39:07,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 19:39:07,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 19:39:07,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 19:39:07,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 19:39:07,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 19:39:07,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 19:39:07,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 19:39:07,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 19:39:07,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 19:39:07,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 19:39:07,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 19:39:07,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 19:39:07,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 19:39:07,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 19:39:07,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 19:39:07,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 19:39:07,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 19:39:07,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 19:39:07,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 19:39:07,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 19:39:07,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 19:39:07,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 19:39:07,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 19:39:07,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 19:39:07,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 19:39:07,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 19:39:07,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 19:39:07,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 19:39:07,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 19:39:07,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 19:39:07,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 19:39:07,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 19:39:07,915 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 19:39:07,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 19:39:07,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 19:39:07,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 19:39:07,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 19:39:07,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 19:39:07,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 19:39:07,945 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 19:39:07,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 19:39:07,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 19:39:07,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 19:39:07,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 19:39:07,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 19:39:07,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 19:39:07,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 19:39:07,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 19:39:07,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 19:39:07,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:39:07,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 19:39:07,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 19:39:07,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 19:39:07,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 19:39:07,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 19:39:07,948 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-05 19:39:07,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 19:39:07,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 19:39:08,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 19:39:08,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 19:39:08,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 19:39:08,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 19:39:08,225 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 19:39:08,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2022-12-05 19:39:09,295 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 19:39:09,482 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 19:39:09,483 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2022-12-05 19:39:09,487 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccb4f22a/8c22f26c0a5b4a899108a1ecc7367e89/FLAG9e9b49191 [2022-12-05 19:39:09,502 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccb4f22a/8c22f26c0a5b4a899108a1ecc7367e89 [2022-12-05 19:39:09,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 19:39:09,505 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 19:39:09,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 19:39:09,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 19:39:09,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 19:39:09,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687e8779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09, skipping insertion in model container [2022-12-05 19:39:09,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 19:39:09,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 19:39:09,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,663 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,663 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,664 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,665 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,666 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,681 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-threaded-sum-3.wvr.c[2957,2970] [2022-12-05 19:39:09,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:39:09,695 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 19:39:09,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,717 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:39:09,724 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:39:09,735 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-threaded-sum-3.wvr.c[2957,2970] [2022-12-05 19:39:09,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:39:09,747 INFO L208 MainTranslator]: Completed translation [2022-12-05 19:39:09,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09 WrapperNode [2022-12-05 19:39:09,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 19:39:09,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 19:39:09,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 19:39:09,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 19:39:09,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,786 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-12-05 19:39:09,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 19:39:09,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 19:39:09,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 19:39:09,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 19:39:09,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 19:39:09,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 19:39:09,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 19:39:09,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 19:39:09,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (1/1) ... [2022-12-05 19:39:09,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:39:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:39:09,849 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 19:39:09,874 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 19:39:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 19:39:09,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 19:39:09,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 19:39:09,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 19:39:09,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 19:39:09,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 19:39:09,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 19:39:09,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 19:39:09,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 19:39:09,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 19:39:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 19:39:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 19:39:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 19:39:09,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 19:39:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 19:39:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 19:39:09,893 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 19:39:09,954 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 19:39:09,955 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 19:39:10,120 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 19:39:10,180 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 19:39:10,181 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 19:39:10,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:39:10 BoogieIcfgContainer [2022-12-05 19:39:10,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 19:39:10,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 19:39:10,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 19:39:10,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 19:39:10,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 07:39:09" (1/3) ... [2022-12-05 19:39:10,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31651ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:39:10, skipping insertion in model container [2022-12-05 19:39:10,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:39:09" (2/3) ... [2022-12-05 19:39:10,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31651ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:39:10, skipping insertion in model container [2022-12-05 19:39:10,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:39:10" (3/3) ... [2022-12-05 19:39:10,188 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-12-05 19:39:10,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 19:39:10,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 19:39:10,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 19:39:10,256 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 19:39:10,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 108 transitions, 240 flow [2022-12-05 19:39:10,319 INFO L130 PetriNetUnfolder]: 8/105 cut-off events. [2022-12-05 19:39:10,320 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 19:39:10,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 105 events. 8/105 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-05 19:39:10,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 108 transitions, 240 flow [2022-12-05 19:39:10,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 95 transitions, 208 flow [2022-12-05 19:39:10,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 19:39:10,337 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;@1366e591, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 19:39:10,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 19:39:10,357 INFO L130 PetriNetUnfolder]: 8/94 cut-off events. [2022-12-05 19:39:10,357 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 19:39:10,358 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:10,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:10,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1506131630, now seen corresponding path program 1 times [2022-12-05 19:39:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:10,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551819207] [2022-12-05 19:39:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:11,421 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 19:39:11,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:11,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551819207] [2022-12-05 19:39:11,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551819207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:11,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:11,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-05 19:39:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412384978] [2022-12-05 19:39:11,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:11,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 19:39:11,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:11,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 19:39:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-05 19:39:11,459 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 108 [2022-12-05 19:39:11,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 208 flow. Second operand has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 0 states have call successors, (0), 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 19:39:11,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:11,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 108 [2022-12-05 19:39:11,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:11,887 INFO L130 PetriNetUnfolder]: 250/650 cut-off events. [2022-12-05 19:39:11,888 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-12-05 19:39:11,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 650 events. 250/650 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3391 event pairs, 57 based on Foata normal form. 68/635 useless extension candidates. Maximal degree in co-relation 1000. Up to 311 conditions per place. [2022-12-05 19:39:11,896 INFO L137 encePairwiseOnDemand]: 95/108 looper letters, 46 selfloop transitions, 8 changer transitions 2/107 dead transitions. [2022-12-05 19:39:11,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 107 transitions, 356 flow [2022-12-05 19:39:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:39:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:39:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 508 transitions. [2022-12-05 19:39:11,912 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2022-12-05 19:39:11,914 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 208 flow. Second operand 7 states and 508 transitions. [2022-12-05 19:39:11,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 107 transitions, 356 flow [2022-12-05 19:39:11,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 107 transitions, 336 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 19:39:11,926 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 220 flow [2022-12-05 19:39:11,928 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=220, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2022-12-05 19:39:11,933 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 2 predicate places. [2022-12-05 19:39:11,933 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 220 flow [2022-12-05 19:39:11,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 0 states have call successors, (0), 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 19:39:11,934 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:11,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:11,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 19:39:11,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash -485550720, now seen corresponding path program 1 times [2022-12-05 19:39:11,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:11,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403520416] [2022-12-05 19:39:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:12,315 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 19:39:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:12,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403520416] [2022-12-05 19:39:12,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403520416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:12,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:12,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:39:12,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710995656] [2022-12-05 19:39:12,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:39:12,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:39:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:39:12,318 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 108 [2022-12-05 19:39:12,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 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 19:39:12,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:12,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 108 [2022-12-05 19:39:12,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:12,677 INFO L130 PetriNetUnfolder]: 902/2048 cut-off events. [2022-12-05 19:39:12,677 INFO L131 PetriNetUnfolder]: For 422/422 co-relation queries the response was YES. [2022-12-05 19:39:12,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 2048 events. 902/2048 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14436 event pairs, 167 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 1724. Up to 472 conditions per place. [2022-12-05 19:39:12,689 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 79 selfloop transitions, 34 changer transitions 0/175 dead transitions. [2022-12-05 19:39:12,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 175 transitions, 712 flow [2022-12-05 19:39:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:39:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:39:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 628 transitions. [2022-12-05 19:39:12,691 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8306878306878307 [2022-12-05 19:39:12,691 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 220 flow. Second operand 7 states and 628 transitions. [2022-12-05 19:39:12,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 175 transitions, 712 flow [2022-12-05 19:39:12,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 175 transitions, 706 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 19:39:12,698 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 526 flow [2022-12-05 19:39:12,698 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2022-12-05 19:39:12,698 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 8 predicate places. [2022-12-05 19:39:12,698 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 526 flow [2022-12-05 19:39:12,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 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 19:39:12,699 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:12,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:12,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 19:39:12,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -380676854, now seen corresponding path program 2 times [2022-12-05 19:39:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:12,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821520089] [2022-12-05 19:39:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:12,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:13,174 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 19:39:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:13,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821520089] [2022-12-05 19:39:13,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821520089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:13,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:13,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-05 19:39:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347098665] [2022-12-05 19:39:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 19:39:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 19:39:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-05 19:39:13,177 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 108 [2022-12-05 19:39:13,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 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 19:39:13,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:13,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 108 [2022-12-05 19:39:13,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:13,475 INFO L130 PetriNetUnfolder]: 779/1817 cut-off events. [2022-12-05 19:39:13,476 INFO L131 PetriNetUnfolder]: For 2271/2334 co-relation queries the response was YES. [2022-12-05 19:39:13,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5212 conditions, 1817 events. 779/1817 cut-off events. For 2271/2334 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11610 event pairs, 156 based on Foata normal form. 55/1768 useless extension candidates. Maximal degree in co-relation 2290. Up to 576 conditions per place. [2022-12-05 19:39:13,489 INFO L137 encePairwiseOnDemand]: 100/108 looper letters, 117 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2022-12-05 19:39:13,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 184 transitions, 1117 flow [2022-12-05 19:39:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:39:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:39:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 576 transitions. [2022-12-05 19:39:13,501 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2022-12-05 19:39:13,501 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 526 flow. Second operand 8 states and 576 transitions. [2022-12-05 19:39:13,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 184 transitions, 1117 flow [2022-12-05 19:39:13,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 184 transitions, 1117 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 19:39:13,516 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 646 flow [2022-12-05 19:39:13,517 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=646, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2022-12-05 19:39:13,517 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 18 predicate places. [2022-12-05 19:39:13,517 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 646 flow [2022-12-05 19:39:13,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 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 19:39:13,518 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:13,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 19:39:13,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash -938805469, now seen corresponding path program 1 times [2022-12-05 19:39:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:13,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9029693] [2022-12-05 19:39:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:13,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:13,799 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 19:39:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9029693] [2022-12-05 19:39:13,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9029693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:13,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:13,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:39:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230804758] [2022-12-05 19:39:13,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:13,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:39:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:39:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:39:13,805 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-12-05 19:39:13,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 646 flow. Second operand has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 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 19:39:13,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:13,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-12-05 19:39:13,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:14,483 INFO L130 PetriNetUnfolder]: 3356/6543 cut-off events. [2022-12-05 19:39:14,484 INFO L131 PetriNetUnfolder]: For 9981/10168 co-relation queries the response was YES. [2022-12-05 19:39:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19953 conditions, 6543 events. 3356/6543 cut-off events. For 9981/10168 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 50503 event pairs, 615 based on Foata normal form. 243/6240 useless extension candidates. Maximal degree in co-relation 10278. Up to 1563 conditions per place. [2022-12-05 19:39:14,538 INFO L137 encePairwiseOnDemand]: 98/108 looper letters, 136 selfloop transitions, 99 changer transitions 0/301 dead transitions. [2022-12-05 19:39:14,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 301 transitions, 2144 flow [2022-12-05 19:39:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:39:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:39:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 635 transitions. [2022-12-05 19:39:14,541 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.83994708994709 [2022-12-05 19:39:14,541 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 646 flow. Second operand 7 states and 635 transitions. [2022-12-05 19:39:14,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 301 transitions, 2144 flow [2022-12-05 19:39:14,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 301 transitions, 2121 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:39:14,574 INFO L231 Difference]: Finished difference. Result has 122 places, 215 transitions, 1613 flow [2022-12-05 19:39:14,575 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1613, PETRI_PLACES=122, PETRI_TRANSITIONS=215} [2022-12-05 19:39:14,575 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 25 predicate places. [2022-12-05 19:39:14,575 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 215 transitions, 1613 flow [2022-12-05 19:39:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 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 19:39:14,576 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:14,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:14,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 19:39:14,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -236962945, now seen corresponding path program 2 times [2022-12-05 19:39:14,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:14,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766818276] [2022-12-05 19:39:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:14,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:14,770 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 19:39:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766818276] [2022-12-05 19:39:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766818276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:14,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:14,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:39:14,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233812865] [2022-12-05 19:39:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:14,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:39:14,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:39:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:39:14,772 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 108 [2022-12-05 19:39:14,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 215 transitions, 1613 flow. Second operand has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 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 19:39:14,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:14,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 108 [2022-12-05 19:39:14,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:15,798 INFO L130 PetriNetUnfolder]: 4583/8838 cut-off events. [2022-12-05 19:39:15,798 INFO L131 PetriNetUnfolder]: For 30389/30675 co-relation queries the response was YES. [2022-12-05 19:39:15,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35126 conditions, 8838 events. 4583/8838 cut-off events. For 30389/30675 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 70533 event pairs, 475 based on Foata normal form. 312/8958 useless extension candidates. Maximal degree in co-relation 29416. Up to 2117 conditions per place. [2022-12-05 19:39:15,880 INFO L137 encePairwiseOnDemand]: 101/108 looper letters, 295 selfloop transitions, 86 changer transitions 0/447 dead transitions. [2022-12-05 19:39:15,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 447 transitions, 4569 flow [2022-12-05 19:39:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:39:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:39:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 707 transitions. [2022-12-05 19:39:15,882 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8182870370370371 [2022-12-05 19:39:15,882 INFO L175 Difference]: Start difference. First operand has 122 places, 215 transitions, 1613 flow. Second operand 8 states and 707 transitions. [2022-12-05 19:39:15,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 447 transitions, 4569 flow [2022-12-05 19:39:15,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 447 transitions, 4545 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-12-05 19:39:15,977 INFO L231 Difference]: Finished difference. Result has 134 places, 272 transitions, 2545 flow [2022-12-05 19:39:15,978 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2545, PETRI_PLACES=134, PETRI_TRANSITIONS=272} [2022-12-05 19:39:15,979 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 37 predicate places. [2022-12-05 19:39:15,979 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 272 transitions, 2545 flow [2022-12-05 19:39:15,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 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 19:39:15,980 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:15,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:15,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 19:39:15,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2138867763, now seen corresponding path program 3 times [2022-12-05 19:39:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962557173] [2022-12-05 19:39:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:16,438 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 19:39:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:16,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962557173] [2022-12-05 19:39:16,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962557173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:16,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:16,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-05 19:39:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780056679] [2022-12-05 19:39:16,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 19:39:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 19:39:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-05 19:39:16,443 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 108 [2022-12-05 19:39:16,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 272 transitions, 2545 flow. Second operand has 8 states, 8 states have (on average 76.75) internal successors, (614), 8 states have internal predecessors, (614), 0 states have call successors, (0), 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 19:39:16,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:16,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 108 [2022-12-05 19:39:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:17,719 INFO L130 PetriNetUnfolder]: 5004/10208 cut-off events. [2022-12-05 19:39:17,720 INFO L131 PetriNetUnfolder]: For 51644/51846 co-relation queries the response was YES. [2022-12-05 19:39:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46627 conditions, 10208 events. 5004/10208 cut-off events. For 51644/51846 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 87816 event pairs, 916 based on Foata normal form. 24/10090 useless extension candidates. Maximal degree in co-relation 40368. Up to 4765 conditions per place. [2022-12-05 19:39:17,825 INFO L137 encePairwiseOnDemand]: 98/108 looper letters, 255 selfloop transitions, 170 changer transitions 0/487 dead transitions. [2022-12-05 19:39:17,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 487 transitions, 5541 flow [2022-12-05 19:39:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 19:39:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 19:39:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 766 transitions. [2022-12-05 19:39:17,827 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7880658436213992 [2022-12-05 19:39:17,827 INFO L175 Difference]: Start difference. First operand has 134 places, 272 transitions, 2545 flow. Second operand 9 states and 766 transitions. [2022-12-05 19:39:17,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 487 transitions, 5541 flow [2022-12-05 19:39:17,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 487 transitions, 5541 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 19:39:17,992 INFO L231 Difference]: Finished difference. Result has 149 places, 387 transitions, 4765 flow [2022-12-05 19:39:17,992 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4765, PETRI_PLACES=149, PETRI_TRANSITIONS=387} [2022-12-05 19:39:17,994 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 52 predicate places. [2022-12-05 19:39:17,995 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 387 transitions, 4765 flow [2022-12-05 19:39:17,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.75) internal successors, (614), 8 states have internal predecessors, (614), 0 states have call successors, (0), 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 19:39:17,995 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:17,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:17,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 19:39:17,995 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash 389179481, now seen corresponding path program 4 times [2022-12-05 19:39:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822016926] [2022-12-05 19:39:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:17,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:18,354 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 19:39:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822016926] [2022-12-05 19:39:18,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822016926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:39:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268958738] [2022-12-05 19:39:18,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:39:18,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:39:18,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:39:18,358 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 19:39:18,416 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 19:39:18,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:39:18,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:39:18,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 19:39:18,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:39:18,685 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 19:39:18,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 19:39:18,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268958738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:18,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 19:39:18,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2022-12-05 19:39:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045213289] [2022-12-05 19:39:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:18,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 19:39:18,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 19:39:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-05 19:39:18,688 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 108 [2022-12-05 19:39:18,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 387 transitions, 4765 flow. Second operand has 9 states, 9 states have (on average 71.0) internal successors, (639), 9 states have internal predecessors, (639), 0 states have call successors, (0), 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 19:39:18,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:18,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 108 [2022-12-05 19:39:18,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:20,848 INFO L130 PetriNetUnfolder]: 7259/13143 cut-off events. [2022-12-05 19:39:20,848 INFO L131 PetriNetUnfolder]: For 94874/95494 co-relation queries the response was YES. [2022-12-05 19:39:20,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66584 conditions, 13143 events. 7259/13143 cut-off events. For 94874/95494 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 108870 event pairs, 1395 based on Foata normal form. 455/13128 useless extension candidates. Maximal degree in co-relation 57291. Up to 6172 conditions per place. [2022-12-05 19:39:21,140 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 327 selfloop transitions, 122 changer transitions 0/507 dead transitions. [2022-12-05 19:39:21,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 507 transitions, 6944 flow [2022-12-05 19:39:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 19:39:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 19:39:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 834 transitions. [2022-12-05 19:39:21,143 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.702020202020202 [2022-12-05 19:39:21,143 INFO L175 Difference]: Start difference. First operand has 149 places, 387 transitions, 4765 flow. Second operand 11 states and 834 transitions. [2022-12-05 19:39:21,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 507 transitions, 6944 flow [2022-12-05 19:39:21,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 507 transitions, 6870 flow, removed 37 selfloop flow, removed 3 redundant places. [2022-12-05 19:39:21,614 INFO L231 Difference]: Finished difference. Result has 158 places, 411 transitions, 5565 flow [2022-12-05 19:39:21,614 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5565, PETRI_PLACES=158, PETRI_TRANSITIONS=411} [2022-12-05 19:39:21,615 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 61 predicate places. [2022-12-05 19:39:21,615 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 411 transitions, 5565 flow [2022-12-05 19:39:21,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 71.0) internal successors, (639), 9 states have internal predecessors, (639), 0 states have call successors, (0), 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 19:39:21,616 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:21,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:21,630 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 19:39:21,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:39:21,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash -207435097, now seen corresponding path program 5 times [2022-12-05 19:39:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:21,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141978014] [2022-12-05 19:39:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:22,132 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 19:39:22,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141978014] [2022-12-05 19:39:22,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141978014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:39:22,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:39:22,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-05 19:39:22,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033406347] [2022-12-05 19:39:22,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:39:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 19:39:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 19:39:22,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-05 19:39:22,134 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 108 [2022-12-05 19:39:22,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 411 transitions, 5565 flow. Second operand has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 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 19:39:22,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:22,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 108 [2022-12-05 19:39:22,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:24,639 INFO L130 PetriNetUnfolder]: 8484/17857 cut-off events. [2022-12-05 19:39:24,639 INFO L131 PetriNetUnfolder]: For 138316/139941 co-relation queries the response was YES. [2022-12-05 19:39:24,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92890 conditions, 17857 events. 8484/17857 cut-off events. For 138316/139941 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 175055 event pairs, 1329 based on Foata normal form. 616/17900 useless extension candidates. Maximal degree in co-relation 67078. Up to 5392 conditions per place. [2022-12-05 19:39:24,826 INFO L137 encePairwiseOnDemand]: 99/108 looper letters, 362 selfloop transitions, 44 changer transitions 0/625 dead transitions. [2022-12-05 19:39:24,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 625 transitions, 9511 flow [2022-12-05 19:39:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:39:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:39:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 599 transitions. [2022-12-05 19:39:24,828 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6932870370370371 [2022-12-05 19:39:24,828 INFO L175 Difference]: Start difference. First operand has 158 places, 411 transitions, 5565 flow. Second operand 8 states and 599 transitions. [2022-12-05 19:39:24,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 625 transitions, 9511 flow [2022-12-05 19:39:25,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 625 transitions, 9343 flow, removed 27 selfloop flow, removed 5 redundant places. [2022-12-05 19:39:25,289 INFO L231 Difference]: Finished difference. Result has 163 places, 449 transitions, 6132 flow [2022-12-05 19:39:25,290 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6132, PETRI_PLACES=163, PETRI_TRANSITIONS=449} [2022-12-05 19:39:25,290 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 66 predicate places. [2022-12-05 19:39:25,290 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 449 transitions, 6132 flow [2022-12-05 19:39:25,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 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 19:39:25,291 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:39:25,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:39:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 19:39:25,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:39:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:39:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1199429773, now seen corresponding path program 1 times [2022-12-05 19:39:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:39:25,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826074135] [2022-12-05 19:39:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:25,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:39:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:39:27,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:39:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826074135] [2022-12-05 19:39:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826074135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:39:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131913918] [2022-12-05 19:39:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:39:27,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:39:27,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:39:27,003 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 19:39:27,035 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 19:39:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:39:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-05 19:39:27,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:39:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:39:28,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:39:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:39:31,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131913918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:39:31,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:39:31,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 22] total 46 [2022-12-05 19:39:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542390645] [2022-12-05 19:39:31,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:39:31,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-05 19:39:31,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:39:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-05 19:39:31,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2022-12-05 19:39:31,392 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 108 [2022-12-05 19:39:31,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 449 transitions, 6132 flow. Second operand has 46 states, 46 states have (on average 59.15217391304348) internal successors, (2721), 46 states have internal predecessors, (2721), 0 states have call successors, (0), 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 19:39:31,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:39:31,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 108 [2022-12-05 19:39:31,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:53,962 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 19:40:16,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 19:41:12,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 19:43:25,786 INFO L130 PetriNetUnfolder]: 149452/285429 cut-off events. [2022-12-05 19:43:25,787 INFO L131 PetriNetUnfolder]: For 2316172/2316172 co-relation queries the response was YES. [2022-12-05 19:43:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1482470 conditions, 285429 events. 149452/285429 cut-off events. For 2316172/2316172 co-relation queries the response was YES. Maximal size of possible extension queue 15645. Compared 3604983 event pairs, 5524 based on Foata normal form. 258/284761 useless extension candidates. Maximal degree in co-relation 970820. Up to 55633 conditions per place. [2022-12-05 19:43:29,754 INFO L137 encePairwiseOnDemand]: 80/108 looper letters, 6697 selfloop transitions, 6090 changer transitions 2955/15787 dead transitions. [2022-12-05 19:43:29,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 15787 transitions, 238645 flow [2022-12-05 19:43:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 551 states. [2022-12-05 19:43:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2022-12-05 19:43:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 35345 transitions. [2022-12-05 19:43:29,831 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5939537541170935 [2022-12-05 19:43:29,831 INFO L175 Difference]: Start difference. First operand has 163 places, 449 transitions, 6132 flow. Second operand 551 states and 35345 transitions. [2022-12-05 19:43:29,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 15787 transitions, 238645 flow [2022-12-05 19:44:57,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 15787 transitions, 238477 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:44:58,082 INFO L231 Difference]: Finished difference. Result has 1008 places, 7368 transitions, 116270 flow [2022-12-05 19:44:58,083 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=6115, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=551, PETRI_FLOW=116270, PETRI_PLACES=1008, PETRI_TRANSITIONS=7368} [2022-12-05 19:44:58,084 INFO L294 CegarLoopForPetriNet]: 97 programPoint places, 911 predicate places. [2022-12-05 19:44:58,084 INFO L495 AbstractCegarLoop]: Abstraction has has 1008 places, 7368 transitions, 116270 flow [2022-12-05 19:44:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 59.15217391304348) internal successors, (2721), 46 states have internal predecessors, (2721), 0 states have call successors, (0), 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 19:44:58,088 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:44:58,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 19:44:58,093 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 19:44:58,293 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,SelfDestructingSolverStorable8 [2022-12-05 19:44:58,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 19:44:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:44:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1724213881, now seen corresponding path program 2 times [2022-12-05 19:44:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:44:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946411949] [2022-12-05 19:44:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:44:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:44:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:45:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:45:00,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:45:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946411949] [2022-12-05 19:45:00,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946411949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:45:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759405760] [2022-12-05 19:45:00,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:45:00,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:45:00,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:45:00,267 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 19:45:00,268 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 19:45:00,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:45:00,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:45:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-05 19:45:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:45:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:45:01,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:45:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:45:07,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759405760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:45:07,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:45:07,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 45 [2022-12-05 19:45:07,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652851217] [2022-12-05 19:45:07,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:45:07,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-05 19:45:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:45:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-05 19:45:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2022-12-05 19:45:07,152 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 108 [2022-12-05 19:45:07,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1008 places, 7368 transitions, 116270 flow. Second operand has 45 states, 45 states have (on average 59.17777777777778) internal successors, (2663), 45 states have internal predecessors, (2663), 0 states have call successors, (0), 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 19:45:07,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:45:07,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 108 [2022-12-05 19:45:07,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:48:02,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 19:48:09,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []