/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 19:41:34,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 19:41:34,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 19:41:34,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 19:41:34,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 19:41:34,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 19:41:34,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 19:41:34,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 19:41:34,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 19:41:34,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 19:41:34,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 19:41:34,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 19:41:34,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 19:41:34,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 19:41:34,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 19:41:34,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 19:41:34,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 19:41:34,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 19:41:34,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 19:41:34,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 19:41:34,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 19:41:34,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 19:41:34,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 19:41:34,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 19:41:34,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 19:41:34,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 19:41:34,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 19:41:34,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 19:41:34,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 19:41:34,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 19:41:34,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 19:41:34,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 19:41:34,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 19:41:34,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 19:41:34,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 19:41:34,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 19:41:34,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 19:41:34,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 19:41:34,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 19:41:34,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 19:41:34,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 19:41:34,869 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 [2022-12-11 19:41:34,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 19:41:34,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 19:41:34,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 19:41:34,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 19:41:34,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 19:41:34,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 19:41:34,902 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 19:41:34,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 19:41:34,902 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 19:41:34,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 19:41:34,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 19:41:34,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 19:41:34,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 19:41:34,905 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 19:41:34,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 19:41:34,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 19:41:34,905 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 19:41:34,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-11 19:41:35,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 19:41:35,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 19:41:35,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 19:41:35,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 19:41:35,186 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 19:41:35,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-11 19:41:36,159 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 19:41:36,394 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 19:41:36,394 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-11 19:41:36,406 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2891aa6d/ce323708e6434a74a449fea89acd443f/FLAG147e9ceaa [2022-12-11 19:41:36,756 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2891aa6d/ce323708e6434a74a449fea89acd443f [2022-12-11 19:41:36,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 19:41:36,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 19:41:36,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 19:41:36,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 19:41:36,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 19:41:36,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 07:41:36" (1/1) ... [2022-12-11 19:41:36,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4615e5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:36, skipping insertion in model container [2022-12-11 19:41:36,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 07:41:36" (1/1) ... [2022-12-11 19:41:36,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 19:41:36,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 19:41:36,912 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,917 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,919 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,922 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,938 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-11 19:41:36,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 19:41:36,968 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 19:41:36,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:36,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 19:41:36,993 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 19:41:37,004 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-11 19:41:37,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 19:41:37,016 INFO L208 MainTranslator]: Completed translation [2022-12-11 19:41:37,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37 WrapperNode [2022-12-11 19:41:37,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 19:41:37,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 19:41:37,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 19:41:37,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 19:41:37,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,056 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-11 19:41:37,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 19:41:37,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 19:41:37,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 19:41:37,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 19:41:37,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,089 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 19:41:37,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 19:41:37,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 19:41:37,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 19:41:37,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (1/1) ... [2022-12-11 19:41:37,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 19:41:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:41:37,149 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) [2022-12-11 19:41:37,170 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 [2022-12-11 19:41:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 19:41:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-11 19:41:37,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-11 19:41:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-11 19:41:37,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-11 19:41:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 19:41:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 19:41:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 19:41:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-11 19:41:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-11 19:41:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 19:41:37,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 19:41:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-11 19:41:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 19:41:37,195 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 19:41:37,259 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 19:41:37,261 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 19:41:37,462 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 19:41:37,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 19:41:37,505 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-11 19:41:37,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 07:41:37 BoogieIcfgContainer [2022-12-11 19:41:37,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 19:41:37,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 19:41:37,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 19:41:37,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 19:41:37,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 07:41:36" (1/3) ... [2022-12-11 19:41:37,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a87e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 07:41:37, skipping insertion in model container [2022-12-11 19:41:37,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 07:41:37" (2/3) ... [2022-12-11 19:41:37,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a87e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 07:41:37, skipping insertion in model container [2022-12-11 19:41:37,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 07:41:37" (3/3) ... [2022-12-11 19:41:37,519 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-12-11 19:41:37,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 19:41:37,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 19:41:37,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 19:41:37,611 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-11 19:41:37,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-12-11 19:41:37,692 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2022-12-11 19:41:37,692 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 19:41:37,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-11 19:41:37,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-12-11 19:41:37,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-12-11 19:41:37,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 19:41:37,721 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;@6240231c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 19:41:37,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 19:41:37,752 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-12-11 19:41:37,752 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 19:41:37,753 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:37,753 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:37,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:37,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:37,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1572774383, now seen corresponding path program 1 times [2022-12-11 19:41:37,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665111032] [2022-12-11 19:41:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:37,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:38,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665111032] [2022-12-11 19:41:38,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665111032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 19:41:38,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 19:41:38,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 19:41:38,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550460118] [2022-12-11 19:41:38,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 19:41:38,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 19:41:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 19:41:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-11 19:41:38,344 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-12-11 19:41:38,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:38,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:38,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-12-11 19:41:38,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:38,480 INFO L130 PetriNetUnfolder]: 44/152 cut-off events. [2022-12-11 19:41:38,480 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-11 19:41:38,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 152 events. 44/152 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 417 event pairs, 2 based on Foata normal form. 13/154 useless extension candidates. Maximal degree in co-relation 187. Up to 53 conditions per place. [2022-12-11 19:41:38,484 INFO L137 encePairwiseOnDemand]: 69/81 looper letters, 34 selfloop transitions, 6 changer transitions 2/83 dead transitions. [2022-12-11 19:41:38,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 271 flow [2022-12-11 19:41:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-11 19:41:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-11 19:41:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 451 transitions. [2022-12-11 19:41:38,500 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6959876543209876 [2022-12-11 19:41:38,501 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 8 states and 451 transitions. [2022-12-11 19:41:38,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 271 flow [2022-12-11 19:41:38,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 257 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-11 19:41:38,510 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 160 flow [2022-12-11 19:41:38,511 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2022-12-11 19:41:38,518 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-12-11 19:41:38,518 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 160 flow [2022-12-11 19:41:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:38,519 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:38,519 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 19:41:38,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1336082922, now seen corresponding path program 1 times [2022-12-11 19:41:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:38,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731980225] [2022-12-11 19:41:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:38,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731980225] [2022-12-11 19:41:38,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731980225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:41:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843886700] [2022-12-11 19:41:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:38,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:41:38,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:41:38,933 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) [2022-12-11 19:41:38,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-11 19:41:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 19:41:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:41:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 19:41:39,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-11 19:41:39,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843886700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 19:41:39,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-11 19:41:39,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-11 19:41:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239345867] [2022-12-11 19:41:39,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 19:41:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 19:41:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 19:41:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-11 19:41:39,288 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 81 [2022-12-11 19:41:39,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:39,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:39,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 81 [2022-12-11 19:41:39,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:39,500 INFO L130 PetriNetUnfolder]: 52/187 cut-off events. [2022-12-11 19:41:39,500 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-11 19:41:39,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 187 events. 52/187 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 528 event pairs, 10 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 173. Up to 76 conditions per place. [2022-12-11 19:41:39,503 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 35 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2022-12-11 19:41:39,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 286 flow [2022-12-11 19:41:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-11 19:41:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-11 19:41:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 372 transitions. [2022-12-11 19:41:39,504 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.656084656084656 [2022-12-11 19:41:39,504 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 160 flow. Second operand 7 states and 372 transitions. [2022-12-11 19:41:39,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 286 flow [2022-12-11 19:41:39,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-11 19:41:39,508 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 205 flow [2022-12-11 19:41:39,508 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2022-12-11 19:41:39,509 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2022-12-11 19:41:39,509 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 205 flow [2022-12-11 19:41:39,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:39,509 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:39,509 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:39,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-11 19:41:39,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:41:39,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -535529180, now seen corresponding path program 2 times [2022-12-11 19:41:39,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:39,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456666408] [2022-12-11 19:41:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:39,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456666408] [2022-12-11 19:41:40,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456666408] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:41:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306404499] [2022-12-11 19:41:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 19:41:40,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:41:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:41:40,053 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) [2022-12-11 19:41:40,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-11 19:41:40,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 19:41:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:41:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-11 19:41:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:41:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:40,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-11 19:41:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306404499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 19:41:40,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-11 19:41:40,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-12-11 19:41:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802880464] [2022-12-11 19:41:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 19:41:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-11 19:41:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-11 19:41:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-11 19:41:40,348 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 81 [2022-12-11 19:41:40,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 48.25) internal successors, (386), 8 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:40,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:40,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 81 [2022-12-11 19:41:40,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:40,625 INFO L130 PetriNetUnfolder]: 99/271 cut-off events. [2022-12-11 19:41:40,625 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2022-12-11 19:41:40,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 271 events. 99/271 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 948 event pairs, 31 based on Foata normal form. 6/273 useless extension candidates. Maximal degree in co-relation 286. Up to 142 conditions per place. [2022-12-11 19:41:40,628 INFO L137 encePairwiseOnDemand]: 71/81 looper letters, 51 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2022-12-11 19:41:40,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 446 flow [2022-12-11 19:41:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-11 19:41:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-11 19:41:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 512 transitions. [2022-12-11 19:41:40,630 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6320987654320988 [2022-12-11 19:41:40,630 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 205 flow. Second operand 10 states and 512 transitions. [2022-12-11 19:41:40,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 446 flow [2022-12-11 19:41:40,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 437 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-11 19:41:40,633 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 279 flow [2022-12-11 19:41:40,633 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=279, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2022-12-11 19:41:40,633 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 17 predicate places. [2022-12-11 19:41:40,633 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 279 flow [2022-12-11 19:41:40,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.25) internal successors, (386), 8 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:40,634 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:40,634 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:40,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-11 19:41:40,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-11 19:41:40,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2111078510, now seen corresponding path program 3 times [2022-12-11 19:41:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:40,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119199460] [2022-12-11 19:41:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:41,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:41,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119199460] [2022-12-11 19:41:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119199460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 19:41:41,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 19:41:41,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 19:41:41,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146105858] [2022-12-11 19:41:41,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 19:41:41,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 19:41:41,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 19:41:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-11 19:41:41,040 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-11 19:41:41,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:41,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:41,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-11 19:41:41,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:41,175 INFO L130 PetriNetUnfolder]: 176/516 cut-off events. [2022-12-11 19:41:41,175 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2022-12-11 19:41:41,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 516 events. 176/516 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2593 event pairs, 21 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 1031. Up to 154 conditions per place. [2022-12-11 19:41:41,179 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 56 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2022-12-11 19:41:41,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 615 flow [2022-12-11 19:41:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-11 19:41:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-11 19:41:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 456 transitions. [2022-12-11 19:41:41,180 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8042328042328042 [2022-12-11 19:41:41,180 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 279 flow. Second operand 7 states and 456 transitions. [2022-12-11 19:41:41,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 615 flow [2022-12-11 19:41:41,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 122 transitions, 602 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-11 19:41:41,184 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 427 flow [2022-12-11 19:41:41,184 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2022-12-11 19:41:41,185 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 24 predicate places. [2022-12-11 19:41:41,185 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 427 flow [2022-12-11 19:41:41,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:41,185 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:41,186 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:41,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-11 19:41:41,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1297629234, now seen corresponding path program 4 times [2022-12-11 19:41:41,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:41,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930971131] [2022-12-11 19:41:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:41,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:41,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930971131] [2022-12-11 19:41:41,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930971131] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:41:41,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403466968] [2022-12-11 19:41:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 19:41:41,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:41:41,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:41:41,732 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) [2022-12-11 19:41:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-11 19:41:41,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 19:41:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:41:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-11 19:41:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:41:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:42,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:41:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:43,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403466968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:41:43,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:41:43,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 31 [2022-12-11 19:41:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94003305] [2022-12-11 19:41:43,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:41:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-11 19:41:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-11 19:41:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-12-11 19:41:43,043 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:41:43,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 427 flow. Second operand has 31 states, 31 states have (on average 44.25806451612903) internal successors, (1372), 31 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:43,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:43,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:41:43,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:46,559 INFO L130 PetriNetUnfolder]: 777/2387 cut-off events. [2022-12-11 19:41:46,560 INFO L131 PetriNetUnfolder]: For 4367/4367 co-relation queries the response was YES. [2022-12-11 19:41:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2387 events. 777/2387 cut-off events. For 4367/4367 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20721 event pairs, 104 based on Foata normal form. 17/2371 useless extension candidates. Maximal degree in co-relation 4982. Up to 453 conditions per place. [2022-12-11 19:41:46,572 INFO L137 encePairwiseOnDemand]: 61/81 looper letters, 233 selfloop transitions, 147 changer transitions 113/526 dead transitions. [2022-12-11 19:41:46,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 526 transitions, 4084 flow [2022-12-11 19:41:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-11 19:41:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-12-11 19:41:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 3656 transitions. [2022-12-11 19:41:46,578 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5786641342196898 [2022-12-11 19:41:46,578 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 427 flow. Second operand 78 states and 3656 transitions. [2022-12-11 19:41:46,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 526 transitions, 4084 flow [2022-12-11 19:41:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 526 transitions, 4008 flow, removed 38 selfloop flow, removed 0 redundant places. [2022-12-11 19:41:46,595 INFO L231 Difference]: Finished difference. Result has 230 places, 238 transitions, 2061 flow [2022-12-11 19:41:46,595 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2061, PETRI_PLACES=230, PETRI_TRANSITIONS=238} [2022-12-11 19:41:46,596 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 158 predicate places. [2022-12-11 19:41:46,596 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 238 transitions, 2061 flow [2022-12-11 19:41:46,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 44.25806451612903) internal successors, (1372), 31 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:46,597 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:46,597 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:46,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-11 19:41:46,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:41:46,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2118278973, now seen corresponding path program 1 times [2022-12-11 19:41:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:46,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288987301] [2022-12-11 19:41:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:46,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288987301] [2022-12-11 19:41:46,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288987301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 19:41:46,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 19:41:46,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 19:41:46,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480107623] [2022-12-11 19:41:46,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 19:41:46,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 19:41:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 19:41:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-11 19:41:46,999 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-11 19:41:46,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 238 transitions, 2061 flow. Second operand has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:46,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:46,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-11 19:41:46,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:47,366 INFO L130 PetriNetUnfolder]: 616/1786 cut-off events. [2022-12-11 19:41:47,366 INFO L131 PetriNetUnfolder]: For 28006/28006 co-relation queries the response was YES. [2022-12-11 19:41:47,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 1786 events. 616/1786 cut-off events. For 28006/28006 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13368 event pairs, 61 based on Foata normal form. 15/1790 useless extension candidates. Maximal degree in co-relation 8961. Up to 489 conditions per place. [2022-12-11 19:41:47,382 INFO L137 encePairwiseOnDemand]: 75/81 looper letters, 223 selfloop transitions, 105 changer transitions 0/374 dead transitions. [2022-12-11 19:41:47,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 374 transitions, 4019 flow [2022-12-11 19:41:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 19:41:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 19:41:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 579 transitions. [2022-12-11 19:41:47,384 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7942386831275721 [2022-12-11 19:41:47,384 INFO L175 Difference]: Start difference. First operand has 230 places, 238 transitions, 2061 flow. Second operand 9 states and 579 transitions. [2022-12-11 19:41:47,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 374 transitions, 4019 flow [2022-12-11 19:41:47,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 374 transitions, 3530 flow, removed 231 selfloop flow, removed 28 redundant places. [2022-12-11 19:41:47,493 INFO L231 Difference]: Finished difference. Result has 196 places, 270 transitions, 2510 flow [2022-12-11 19:41:47,494 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2510, PETRI_PLACES=196, PETRI_TRANSITIONS=270} [2022-12-11 19:41:47,496 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 124 predicate places. [2022-12-11 19:41:47,497 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 270 transitions, 2510 flow [2022-12-11 19:41:47,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:47,497 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:47,498 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:47,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-11 19:41:47,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1854028487, now seen corresponding path program 5 times [2022-12-11 19:41:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:47,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085689886] [2022-12-11 19:41:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:47,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-11 19:41:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:47,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085689886] [2022-12-11 19:41:47,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085689886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 19:41:47,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 19:41:47,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 19:41:47,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188001523] [2022-12-11 19:41:47,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 19:41:47,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 19:41:47,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 19:41:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-11 19:41:47,664 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-11 19:41:47,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 270 transitions, 2510 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:47,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:47,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-11 19:41:47,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:41:47,982 INFO L130 PetriNetUnfolder]: 611/1663 cut-off events. [2022-12-11 19:41:47,982 INFO L131 PetriNetUnfolder]: For 28482/28482 co-relation queries the response was YES. [2022-12-11 19:41:47,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9006 conditions, 1663 events. 611/1663 cut-off events. For 28482/28482 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11973 event pairs, 80 based on Foata normal form. 10/1658 useless extension candidates. Maximal degree in co-relation 8208. Up to 708 conditions per place. [2022-12-11 19:41:47,997 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 213 selfloop transitions, 85 changer transitions 0/344 dead transitions. [2022-12-11 19:41:47,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 344 transitions, 3733 flow [2022-12-11 19:41:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-11 19:41:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-11 19:41:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 445 transitions. [2022-12-11 19:41:47,999 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7848324514991182 [2022-12-11 19:41:47,999 INFO L175 Difference]: Start difference. First operand has 196 places, 270 transitions, 2510 flow. Second operand 7 states and 445 transitions. [2022-12-11 19:41:47,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 344 transitions, 3733 flow [2022-12-11 19:41:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 344 transitions, 3525 flow, removed 64 selfloop flow, removed 1 redundant places. [2022-12-11 19:41:48,168 INFO L231 Difference]: Finished difference. Result has 205 places, 281 transitions, 2782 flow [2022-12-11 19:41:48,168 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2782, PETRI_PLACES=205, PETRI_TRANSITIONS=281} [2022-12-11 19:41:48,169 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 133 predicate places. [2022-12-11 19:41:48,169 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 281 transitions, 2782 flow [2022-12-11 19:41:48,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:48,170 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:41:48,170 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:41:48,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-11 19:41:48,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:41:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:41:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1043390002, now seen corresponding path program 2 times [2022-12-11 19:41:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:41:48,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652561406] [2022-12-11 19:41:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:41:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:41:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:41:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:41:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652561406] [2022-12-11 19:41:49,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652561406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:41:49,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378942408] [2022-12-11 19:41:49,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 19:41:49,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:41:49,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:41:49,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:41:49,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-11 19:41:49,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 19:41:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:41:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-11 19:41:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:41:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:41:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:41:51,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378942408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:41:51,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:41:51,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-12-11 19:41:51,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565873285] [2022-12-11 19:41:51,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:41:51,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-11 19:41:51,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:41:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-11 19:41:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-12-11 19:41:51,809 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:41:51,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 281 transitions, 2782 flow. Second operand has 40 states, 40 states have (on average 44.125) internal successors, (1765), 40 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:41:51,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:41:51,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:41:51,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:42:22,006 INFO L130 PetriNetUnfolder]: 1306/3797 cut-off events. [2022-12-11 19:42:22,006 INFO L131 PetriNetUnfolder]: For 60677/60677 co-relation queries the response was YES. [2022-12-11 19:42:22,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19248 conditions, 3797 events. 1306/3797 cut-off events. For 60677/60677 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35023 event pairs, 68 based on Foata normal form. 16/3796 useless extension candidates. Maximal degree in co-relation 18851. Up to 572 conditions per place. [2022-12-11 19:42:22,042 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 456 selfloop transitions, 440 changer transitions 214/1143 dead transitions. [2022-12-11 19:42:22,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1143 transitions, 14691 flow [2022-12-11 19:42:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-12-11 19:42:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2022-12-11 19:42:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 7575 transitions. [2022-12-11 19:42:22,064 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5633645693886657 [2022-12-11 19:42:22,064 INFO L175 Difference]: Start difference. First operand has 205 places, 281 transitions, 2782 flow. Second operand 166 states and 7575 transitions. [2022-12-11 19:42:22,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1143 transitions, 14691 flow [2022-12-11 19:42:22,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1143 transitions, 14377 flow, removed 156 selfloop flow, removed 1 redundant places. [2022-12-11 19:42:22,227 INFO L231 Difference]: Finished difference. Result has 449 places, 648 transitions, 8796 flow [2022-12-11 19:42:22,227 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=166, PETRI_FLOW=8796, PETRI_PLACES=449, PETRI_TRANSITIONS=648} [2022-12-11 19:42:22,229 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 377 predicate places. [2022-12-11 19:42:22,229 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 648 transitions, 8796 flow [2022-12-11 19:42:22,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 44.125) internal successors, (1765), 40 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:42:22,230 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:42:22,230 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:42:22,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-11 19:42:22,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:42:22,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:42:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:42:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2091099358, now seen corresponding path program 3 times [2022-12-11 19:42:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:42:22,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236748146] [2022-12-11 19:42:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:42:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:42:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:42:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:42:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:42:23,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236748146] [2022-12-11 19:42:23,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236748146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:42:23,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973610843] [2022-12-11 19:42:23,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 19:42:23,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:42:23,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:42:23,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:42:23,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-11 19:42:23,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-11 19:42:23,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:42:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-11 19:42:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:42:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:42:24,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:42:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:42:26,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973610843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:42:26,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:42:26,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 18] total 42 [2022-12-11 19:42:26,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675628188] [2022-12-11 19:42:26,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:42:26,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-11 19:42:26,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:42:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-11 19:42:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2022-12-11 19:42:26,266 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 81 [2022-12-11 19:42:26,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 648 transitions, 8796 flow. Second operand has 42 states, 42 states have (on average 45.95238095238095) internal successors, (1930), 42 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:42:26,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:42:26,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 81 [2022-12-11 19:42:26,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:42:52,699 INFO L130 PetriNetUnfolder]: 1277/3912 cut-off events. [2022-12-11 19:42:52,699 INFO L131 PetriNetUnfolder]: For 78273/78488 co-relation queries the response was YES. [2022-12-11 19:42:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25756 conditions, 3912 events. 1277/3912 cut-off events. For 78273/78488 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 36608 event pairs, 39 based on Foata normal form. 36/3921 useless extension candidates. Maximal degree in co-relation 25540. Up to 816 conditions per place. [2022-12-11 19:42:52,763 INFO L137 encePairwiseOnDemand]: 63/81 looper letters, 534 selfloop transitions, 452 changer transitions 158/1242 dead transitions. [2022-12-11 19:42:52,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1242 transitions, 19556 flow [2022-12-11 19:42:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-11 19:42:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-12-11 19:42:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5103 transitions. [2022-12-11 19:42:52,774 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5887850467289719 [2022-12-11 19:42:52,774 INFO L175 Difference]: Start difference. First operand has 449 places, 648 transitions, 8796 flow. Second operand 107 states and 5103 transitions. [2022-12-11 19:42:52,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1242 transitions, 19556 flow [2022-12-11 19:42:53,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1242 transitions, 16590 flow, removed 1435 selfloop flow, removed 63 redundant places. [2022-12-11 19:42:53,207 INFO L231 Difference]: Finished difference. Result has 489 places, 854 transitions, 11683 flow [2022-12-11 19:42:53,208 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=7377, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=11683, PETRI_PLACES=489, PETRI_TRANSITIONS=854} [2022-12-11 19:42:53,208 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 417 predicate places. [2022-12-11 19:42:53,209 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 854 transitions, 11683 flow [2022-12-11 19:42:53,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 45.95238095238095) internal successors, (1930), 42 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:42:53,209 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:42:53,209 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:42:53,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-11 19:42:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:42:53,414 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:42:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:42:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash 781020052, now seen corresponding path program 4 times [2022-12-11 19:42:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:42:53,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268004640] [2022-12-11 19:42:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:42:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:42:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:42:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:42:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:42:54,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268004640] [2022-12-11 19:42:54,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268004640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:42:54,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589961035] [2022-12-11 19:42:54,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 19:42:54,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:42:54,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:42:54,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:42:54,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-11 19:42:54,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 19:42:54,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:42:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-11 19:42:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:42:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:42:55,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:42:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:42:57,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589961035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:42:57,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:42:57,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18] total 43 [2022-12-11 19:42:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043984503] [2022-12-11 19:42:57,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:42:57,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-11 19:42:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:42:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-11 19:42:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2022-12-11 19:42:57,380 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:42:57,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 854 transitions, 11683 flow. Second operand has 43 states, 43 states have (on average 44.04651162790697) internal successors, (1894), 43 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:42:57,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:42:57,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:42:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:43:26,112 INFO L130 PetriNetUnfolder]: 1981/5504 cut-off events. [2022-12-11 19:43:26,112 INFO L131 PetriNetUnfolder]: For 103473/103473 co-relation queries the response was YES. [2022-12-11 19:43:26,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37570 conditions, 5504 events. 1981/5504 cut-off events. For 103473/103473 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 53344 event pairs, 91 based on Foata normal form. 13/5501 useless extension candidates. Maximal degree in co-relation 37295. Up to 1486 conditions per place. [2022-12-11 19:43:26,187 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 765 selfloop transitions, 568 changer transitions 164/1530 dead transitions. [2022-12-11 19:43:26,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1530 transitions, 24970 flow [2022-12-11 19:43:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-12-11 19:43:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2022-12-11 19:43:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 5724 transitions. [2022-12-11 19:43:26,191 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5653333333333334 [2022-12-11 19:43:26,191 INFO L175 Difference]: Start difference. First operand has 489 places, 854 transitions, 11683 flow. Second operand 125 states and 5724 transitions. [2022-12-11 19:43:26,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1530 transitions, 24970 flow [2022-12-11 19:43:26,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1530 transitions, 23277 flow, removed 787 selfloop flow, removed 51 redundant places. [2022-12-11 19:43:26,929 INFO L231 Difference]: Finished difference. Result has 582 places, 1086 transitions, 16391 flow [2022-12-11 19:43:26,929 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=11022, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=16391, PETRI_PLACES=582, PETRI_TRANSITIONS=1086} [2022-12-11 19:43:26,930 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 510 predicate places. [2022-12-11 19:43:26,930 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 1086 transitions, 16391 flow [2022-12-11 19:43:26,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 44.04651162790697) internal successors, (1894), 43 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:43:26,931 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:43:26,931 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:43:26,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-11 19:43:27,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:43:27,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:43:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:43:27,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1869260354, now seen corresponding path program 5 times [2022-12-11 19:43:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:43:27,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163188472] [2022-12-11 19:43:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:43:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:43:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:43:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:43:28,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:43:28,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163188472] [2022-12-11 19:43:28,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163188472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:43:28,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050205945] [2022-12-11 19:43:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 19:43:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:43:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:43:28,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:43:28,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-11 19:43:28,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-11 19:43:28,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:43:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-11 19:43:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:43:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:43:29,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:43:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:43:33,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050205945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:43:33,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:43:33,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 43 [2022-12-11 19:43:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122992333] [2022-12-11 19:43:33,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:43:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-11 19:43:33,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:43:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-11 19:43:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2022-12-11 19:43:33,933 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:43:33,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1086 transitions, 16391 flow. Second operand has 43 states, 43 states have (on average 43.883720930232556) internal successors, (1887), 43 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:43:33,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:43:33,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:43:33,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:44:21,340 INFO L130 PetriNetUnfolder]: 2478/6695 cut-off events. [2022-12-11 19:44:21,341 INFO L131 PetriNetUnfolder]: For 152847/152847 co-relation queries the response was YES. [2022-12-11 19:44:21,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51147 conditions, 6695 events. 2478/6695 cut-off events. For 152847/152847 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 65517 event pairs, 55 based on Foata normal form. 12/6689 useless extension candidates. Maximal degree in co-relation 50871. Up to 1425 conditions per place. [2022-12-11 19:44:21,428 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 841 selfloop transitions, 1071 changer transitions 125/2070 dead transitions. [2022-12-11 19:44:21,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 2070 transitions, 37158 flow [2022-12-11 19:44:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-12-11 19:44:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-12-11 19:44:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 5780 transitions. [2022-12-11 19:44:21,433 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5663335292964923 [2022-12-11 19:44:21,433 INFO L175 Difference]: Start difference. First operand has 582 places, 1086 transitions, 16391 flow. Second operand 126 states and 5780 transitions. [2022-12-11 19:44:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 2070 transitions, 37158 flow [2022-12-11 19:44:22,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 2070 transitions, 35189 flow, removed 859 selfloop flow, removed 70 redundant places. [2022-12-11 19:44:22,321 INFO L231 Difference]: Finished difference. Result has 659 places, 1623 transitions, 28816 flow [2022-12-11 19:44:22,322 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=15554, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=28816, PETRI_PLACES=659, PETRI_TRANSITIONS=1623} [2022-12-11 19:44:22,322 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 587 predicate places. [2022-12-11 19:44:22,322 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 1623 transitions, 28816 flow [2022-12-11 19:44:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 43.883720930232556) internal successors, (1887), 43 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:44:22,323 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:44:22,323 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:44:22,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-11 19:44:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:44:22,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:44:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:44:22,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1399236666, now seen corresponding path program 6 times [2022-12-11 19:44:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:44:22,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405071895] [2022-12-11 19:44:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:44:22,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:44:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:44:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:44:23,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:44:23,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405071895] [2022-12-11 19:44:23,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405071895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:44:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7246627] [2022-12-11 19:44:23,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 19:44:23,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:44:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:44:23,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:44:23,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-11 19:44:23,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-11 19:44:23,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:44:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-11 19:44:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:44:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:44:24,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:44:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:44:26,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7246627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:44:26,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:44:26,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 35 [2022-12-11 19:44:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744172778] [2022-12-11 19:44:26,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:44:26,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-11 19:44:26,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:44:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-11 19:44:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-12-11 19:44:26,997 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:44:26,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1623 transitions, 28816 flow. Second operand has 35 states, 35 states have (on average 44.285714285714285) internal successors, (1550), 35 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:44:26,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:44:26,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:44:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:44:39,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-11 19:44:47,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-11 19:45:01,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-11 19:46:28,599 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 169 DAG size of output: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-11 19:48:39,871 INFO L130 PetriNetUnfolder]: 4037/11289 cut-off events. [2022-12-11 19:48:39,871 INFO L131 PetriNetUnfolder]: For 343876/343876 co-relation queries the response was YES. [2022-12-11 19:48:39,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95882 conditions, 11289 events. 4037/11289 cut-off events. For 343876/343876 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 121308 event pairs, 150 based on Foata normal form. 37/11264 useless extension candidates. Maximal degree in co-relation 95545. Up to 2158 conditions per place. [2022-12-11 19:48:40,056 INFO L137 encePairwiseOnDemand]: 60/81 looper letters, 1504 selfloop transitions, 1796 changer transitions 571/3904 dead transitions. [2022-12-11 19:48:40,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 3904 transitions, 80860 flow [2022-12-11 19:48:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2022-12-11 19:48:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2022-12-11 19:48:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 14579 transitions. [2022-12-11 19:48:40,066 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5607092034921733 [2022-12-11 19:48:40,066 INFO L175 Difference]: Start difference. First operand has 659 places, 1623 transitions, 28816 flow. Second operand 321 states and 14579 transitions. [2022-12-11 19:48:40,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 3904 transitions, 80860 flow [2022-12-11 19:48:43,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 885 places, 3904 transitions, 74730 flow, removed 2802 selfloop flow, removed 66 redundant places. [2022-12-11 19:48:43,284 INFO L231 Difference]: Finished difference. Result has 1120 places, 2730 transitions, 56068 flow [2022-12-11 19:48:43,286 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=27219, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=321, PETRI_FLOW=56068, PETRI_PLACES=1120, PETRI_TRANSITIONS=2730} [2022-12-11 19:48:43,287 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 1048 predicate places. [2022-12-11 19:48:43,287 INFO L495 AbstractCegarLoop]: Abstraction has has 1120 places, 2730 transitions, 56068 flow [2022-12-11 19:48:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 44.285714285714285) internal successors, (1550), 35 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:48:43,287 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:48:43,288 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:48:43,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-11 19:48:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-11 19:48:43,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:48:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:48:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash 101340709, now seen corresponding path program 7 times [2022-12-11 19:48:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:48:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677772507] [2022-12-11 19:48:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:48:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:48:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:48:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:48:44,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:48:44,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677772507] [2022-12-11 19:48:44,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677772507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:48:44,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793398071] [2022-12-11 19:48:44,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 19:48:44,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:48:44,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:48:44,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:48:44,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-11 19:48:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:48:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-11 19:48:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:48:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:48:45,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:48:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:48:46,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793398071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:48:46,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:48:46,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 41 [2022-12-11 19:48:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539354873] [2022-12-11 19:48:46,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:48:46,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-11 19:48:46,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:48:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-11 19:48:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-12-11 19:48:46,671 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:48:46,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1120 places, 2730 transitions, 56068 flow. Second operand has 41 states, 41 states have (on average 44.4390243902439) internal successors, (1822), 41 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:48:46,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:48:46,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:48:46,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:49:34,180 INFO L130 PetriNetUnfolder]: 5092/13670 cut-off events. [2022-12-11 19:49:34,180 INFO L131 PetriNetUnfolder]: For 1034763/1034763 co-relation queries the response was YES. [2022-12-11 19:49:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157916 conditions, 13670 events. 5092/13670 cut-off events. For 1034763/1034763 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 148715 event pairs, 221 based on Foata normal form. 16/13618 useless extension candidates. Maximal degree in co-relation 157476. Up to 2508 conditions per place. [2022-12-11 19:49:34,571 INFO L137 encePairwiseOnDemand]: 60/81 looper letters, 1843 selfloop transitions, 2414 changer transitions 291/4581 dead transitions. [2022-12-11 19:49:34,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 4581 transitions, 115955 flow [2022-12-11 19:49:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-12-11 19:49:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2022-12-11 19:49:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 8140 transitions. [2022-12-11 19:49:34,585 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5709876543209876 [2022-12-11 19:49:34,585 INFO L175 Difference]: Start difference. First operand has 1120 places, 2730 transitions, 56068 flow. Second operand 176 states and 8140 transitions. [2022-12-11 19:49:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 4581 transitions, 115955 flow [2022-12-11 19:49:46,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1040 places, 4581 transitions, 105465 flow, removed 5200 selfloop flow, removed 128 redundant places. [2022-12-11 19:49:46,175 INFO L231 Difference]: Finished difference. Result has 1137 places, 3628 transitions, 79895 flow [2022-12-11 19:49:46,178 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=51092, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=176, PETRI_FLOW=79895, PETRI_PLACES=1137, PETRI_TRANSITIONS=3628} [2022-12-11 19:49:46,179 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 1065 predicate places. [2022-12-11 19:49:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 1137 places, 3628 transitions, 79895 flow [2022-12-11 19:49:46,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 44.4390243902439) internal successors, (1822), 41 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:49:46,180 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:49:46,180 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:49:46,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-11 19:49:46,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-11 19:49:46,385 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:49:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:49:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 744844509, now seen corresponding path program 8 times [2022-12-11 19:49:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:49:46,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984515362] [2022-12-11 19:49:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:49:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:49:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:49:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:49:47,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:49:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984515362] [2022-12-11 19:49:47,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984515362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:49:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991837632] [2022-12-11 19:49:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 19:49:47,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:49:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:49:47,398 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:49:47,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-11 19:49:47,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 19:49:47,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:49:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-11 19:49:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:49:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:49:48,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:49:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:49:51,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991837632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:49:51,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:49:51,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 46 [2022-12-11 19:49:51,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164652634] [2022-12-11 19:49:51,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:49:51,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-11 19:49:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:49:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-11 19:49:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1776, Unknown=0, NotChecked=0, Total=2070 [2022-12-11 19:49:51,018 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:49:51,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 3628 transitions, 79895 flow. Second operand has 46 states, 46 states have (on average 44.108695652173914) internal successors, (2029), 46 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:49:51,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:49:51,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:49:51,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:51:01,067 INFO L130 PetriNetUnfolder]: 5991/16122 cut-off events. [2022-12-11 19:51:01,068 INFO L131 PetriNetUnfolder]: For 1101888/1101888 co-relation queries the response was YES. [2022-12-11 19:51:01,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185502 conditions, 16122 events. 5991/16122 cut-off events. For 1101888/1101888 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 180581 event pairs, 288 based on Foata normal form. 14/16040 useless extension candidates. Maximal degree in co-relation 185050. Up to 3060 conditions per place. [2022-12-11 19:51:01,509 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 1995 selfloop transitions, 2910 changer transitions 255/5193 dead transitions. [2022-12-11 19:51:01,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1270 places, 5193 transitions, 135040 flow [2022-12-11 19:51:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-12-11 19:51:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2022-12-11 19:51:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 8414 transitions. [2022-12-11 19:51:01,516 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5676313836605276 [2022-12-11 19:51:01,516 INFO L175 Difference]: Start difference. First operand has 1137 places, 3628 transitions, 79895 flow. Second operand 183 states and 8414 transitions. [2022-12-11 19:51:01,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1270 places, 5193 transitions, 135040 flow [2022-12-11 19:51:18,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1191 places, 5193 transitions, 130404 flow, removed 2078 selfloop flow, removed 79 redundant places. [2022-12-11 19:51:18,273 INFO L231 Difference]: Finished difference. Result has 1282 places, 4332 transitions, 104405 flow [2022-12-11 19:51:18,276 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=76922, PETRI_DIFFERENCE_MINUEND_PLACES=1009, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=183, PETRI_FLOW=104405, PETRI_PLACES=1282, PETRI_TRANSITIONS=4332} [2022-12-11 19:51:18,277 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 1210 predicate places. [2022-12-11 19:51:18,277 INFO L495 AbstractCegarLoop]: Abstraction has has 1282 places, 4332 transitions, 104405 flow [2022-12-11 19:51:18,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 44.108695652173914) internal successors, (2029), 46 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:51:18,277 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:51:18,278 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:51:18,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-11 19:51:18,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-11 19:51:18,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:51:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:51:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1432043297, now seen corresponding path program 9 times [2022-12-11 19:51:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:51:18,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807297176] [2022-12-11 19:51:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:51:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:51:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:51:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 19:51:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:51:18,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807297176] [2022-12-11 19:51:18,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807297176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:51:18,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414681296] [2022-12-11 19:51:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 19:51:18,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:51:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:51:18,658 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:51:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-11 19:51:18,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-11 19:51:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:51:18,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-11 19:51:18,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:51:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-11 19:51:18,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:51:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-11 19:51:19,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414681296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:51:19,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:51:19,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 7] total 18 [2022-12-11 19:51:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404761267] [2022-12-11 19:51:19,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:51:19,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 19:51:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:51:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 19:51:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-11 19:51:19,005 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 81 [2022-12-11 19:51:19,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1282 places, 4332 transitions, 104405 flow. Second operand has 18 states, 18 states have (on average 48.77777777777778) internal successors, (878), 18 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:51:19,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:51:19,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 81 [2022-12-11 19:51:19,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:51:37,871 INFO L130 PetriNetUnfolder]: 5006/12191 cut-off events. [2022-12-11 19:51:37,871 INFO L131 PetriNetUnfolder]: For 1098688/1098688 co-relation queries the response was YES. [2022-12-11 19:51:38,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164644 conditions, 12191 events. 5006/12191 cut-off events. For 1098688/1098688 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 118897 event pairs, 34 based on Foata normal form. 251/12429 useless extension candidates. Maximal degree in co-relation 164215. Up to 3905 conditions per place. [2022-12-11 19:51:38,357 INFO L137 encePairwiseOnDemand]: 67/81 looper letters, 3765 selfloop transitions, 1433 changer transitions 0/5234 dead transitions. [2022-12-11 19:51:38,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1242 places, 5234 transitions, 140079 flow [2022-12-11 19:51:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-11 19:51:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-11 19:51:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 888 transitions. [2022-12-11 19:51:38,358 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6090534979423868 [2022-12-11 19:51:38,358 INFO L175 Difference]: Start difference. First operand has 1282 places, 4332 transitions, 104405 flow. Second operand 18 states and 888 transitions. [2022-12-11 19:51:38,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1242 places, 5234 transitions, 140079 flow [2022-12-11 19:51:54,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1122 places, 5234 transitions, 133170 flow, removed 1258 selfloop flow, removed 120 redundant places. [2022-12-11 19:51:54,168 INFO L231 Difference]: Finished difference. Result has 1129 places, 4450 transitions, 106401 flow [2022-12-11 19:51:54,171 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=92241, PETRI_DIFFERENCE_MINUEND_PLACES=1105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=106401, PETRI_PLACES=1129, PETRI_TRANSITIONS=4450} [2022-12-11 19:51:54,171 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 1057 predicate places. [2022-12-11 19:51:54,171 INFO L495 AbstractCegarLoop]: Abstraction has has 1129 places, 4450 transitions, 106401 flow [2022-12-11 19:51:54,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 48.77777777777778) internal successors, (878), 18 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:51:54,172 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:51:54,172 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:51:54,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-11 19:51:54,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-11 19:51:54,381 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:51:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:51:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1690259945, now seen corresponding path program 10 times [2022-12-11 19:51:54,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:51:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942017499] [2022-12-11 19:51:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:51:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:51:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:51:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:51:55,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:51:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942017499] [2022-12-11 19:51:55,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942017499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:51:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84682480] [2022-12-11 19:51:55,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 19:51:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:51:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:51:55,508 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:51:55,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-11 19:51:55,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 19:51:55,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:51:55,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-11 19:51:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:51:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:51:57,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:52:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:52:00,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84682480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:52:00,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:52:00,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 21] total 53 [2022-12-11 19:52:00,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553255130] [2022-12-11 19:52:00,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:52:00,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-11 19:52:00,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:52:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-11 19:52:00,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2288, Unknown=0, NotChecked=0, Total=2756 [2022-12-11 19:52:00,327 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:52:00,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1129 places, 4450 transitions, 106401 flow. Second operand has 53 states, 53 states have (on average 43.84905660377358) internal successors, (2324), 53 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:52:00,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:52:00,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:52:00,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 19:53:22,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-11 19:53:36,523 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 143 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-11 19:54:56,450 INFO L130 PetriNetUnfolder]: 6959/17311 cut-off events. [2022-12-11 19:54:56,450 INFO L131 PetriNetUnfolder]: For 1408585/1408585 co-relation queries the response was YES. [2022-12-11 19:54:56,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237128 conditions, 17311 events. 6959/17311 cut-off events. For 1408585/1408585 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 181104 event pairs, 43 based on Foata normal form. 17/17298 useless extension candidates. Maximal degree in co-relation 236763. Up to 3813 conditions per place. [2022-12-11 19:54:56,964 INFO L137 encePairwiseOnDemand]: 58/81 looper letters, 2154 selfloop transitions, 4703 changer transitions 195/7085 dead transitions. [2022-12-11 19:54:56,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1343 places, 7085 transitions, 195883 flow [2022-12-11 19:54:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2022-12-11 19:54:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2022-12-11 19:54:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 9778 transitions. [2022-12-11 19:54:56,969 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5614699971289119 [2022-12-11 19:54:56,969 INFO L175 Difference]: Start difference. First operand has 1129 places, 4450 transitions, 106401 flow. Second operand 215 states and 9778 transitions. [2022-12-11 19:54:56,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1343 places, 7085 transitions, 195883 flow [2022-12-11 19:55:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1318 places, 7085 transitions, 191180 flow, removed 1792 selfloop flow, removed 25 redundant places. [2022-12-11 19:55:22,185 INFO L231 Difference]: Finished difference. Result has 1412 places, 6149 transitions, 169347 flow [2022-12-11 19:55:22,189 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=104521, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=215, PETRI_FLOW=169347, PETRI_PLACES=1412, PETRI_TRANSITIONS=6149} [2022-12-11 19:55:22,190 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 1340 predicate places. [2022-12-11 19:55:22,190 INFO L495 AbstractCegarLoop]: Abstraction has has 1412 places, 6149 transitions, 169347 flow [2022-12-11 19:55:22,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 43.84905660377358) internal successors, (2324), 53 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:55:22,191 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 19:55:22,191 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 19:55:22,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-11 19:55:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-11 19:55:22,396 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 19:55:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 19:55:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1042554616, now seen corresponding path program 11 times [2022-12-11 19:55:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 19:55:22,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654720484] [2022-12-11 19:55:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 19:55:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 19:55:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 19:55:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:55:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 19:55:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654720484] [2022-12-11 19:55:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654720484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 19:55:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725680815] [2022-12-11 19:55:25,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 19:55:25,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 19:55:25,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 19:55:25,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 19:55:25,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-11 19:55:25,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-11 19:55:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 19:55:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-11 19:55:25,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 19:55:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:55:27,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 19:55:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 19:55:39,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725680815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 19:55:39,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 19:55:39,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 21] total 48 [2022-12-11 19:55:39,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078824231] [2022-12-11 19:55:39,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 19:55:39,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-11 19:55:39,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 19:55:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-11 19:55:39,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2022-12-11 19:55:39,456 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-11 19:55:39,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1412 places, 6149 transitions, 169347 flow. Second operand has 48 states, 48 states have (on average 44.145833333333336) internal successors, (2119), 48 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 19:55:39,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 19:55:39,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-11 19:55:39,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-11 19:55:49,082 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 19:55:49,129 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 19:55:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-11 19:55:49,509 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-11 19:55:49,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-11 19:55:49,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-11 19:55:49,710 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. [2022-12-11 19:55:49,712 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-11 19:55:49,712 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-11 19:55:49,712 INFO L445 BasicCegarLoop]: Path program histogram: [11, 5, 1] [2022-12-11 19:55:49,715 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-11 19:55:49,716 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-11 19:55:49,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.12 07:55:49 BasicIcfg [2022-12-11 19:55:49,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-11 19:55:49,718 INFO L158 Benchmark]: Toolchain (without parser) took 852959.35ms. Allocated memory was 177.2MB in the beginning and 5.2GB in the end (delta: 5.1GB). Free memory was 153.0MB in the beginning and 669.5MB in the end (delta: -516.5MB). Peak memory consumption was 4.5GB. Max. memory is 8.0GB. [2022-12-11 19:55:49,719 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 177.2MB. Free memory is still 155.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-11 19:55:49,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.58ms. Allocated memory is still 177.2MB. Free memory was 153.0MB in the beginning and 140.4MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-11 19:55:49,719 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.81ms. Allocated memory is still 177.2MB. Free memory was 140.4MB in the beginning and 138.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-11 19:55:49,719 INFO L158 Benchmark]: Boogie Preprocessor took 36.95ms. Allocated memory is still 177.2MB. Free memory was 138.9MB in the beginning and 137.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-11 19:55:49,719 INFO L158 Benchmark]: RCFGBuilder took 412.06ms. Allocated memory is still 177.2MB. Free memory was 137.3MB in the beginning and 122.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-12-11 19:55:49,719 INFO L158 Benchmark]: TraceAbstraction took 852204.38ms. Allocated memory was 177.2MB in the beginning and 5.2GB in the end (delta: 5.1GB). Free memory was 121.6MB in the beginning and 669.5MB in the end (delta: -548.0MB). Peak memory consumption was 4.5GB. Max. memory is 8.0GB. [2022-12-11 19:55:49,722 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 177.2MB. Free memory is still 155.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 257.58ms. Allocated memory is still 177.2MB. Free memory was 153.0MB in the beginning and 140.4MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.81ms. Allocated memory is still 177.2MB. Free memory was 140.4MB in the beginning and 138.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.95ms. Allocated memory is still 177.2MB. Free memory was 138.9MB in the beginning and 137.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 412.06ms. Allocated memory is still 177.2MB. Free memory was 137.3MB in the beginning and 122.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 852204.38ms. Allocated memory was 177.2MB in the beginning and 5.2GB in the end (delta: 5.1GB). Free memory was 121.6MB in the beginning and 669.5MB in the end (delta: -548.0MB). Peak memory consumption was 4.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 852.1s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 790.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 8027 SdHoareTripleChecker+Valid, 76.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8027 mSDsluCounter, 6055 SdHoareTripleChecker+Invalid, 72.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5670 mSDsCounter, 1635 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25944 IncrementalHoareTripleChecker+Invalid, 27581 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1635 mSolverCounterUnsat, 385 mSDtfsCounter, 25944 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3230 GetRequests, 1418 SyntacticMatches, 10 SemanticMatches, 1801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136713 ImplicationChecksByTransitivity, 576.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169347occurred in iteration=16, InterpolantAutomatonStates: 1563, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 56.1s InterpolantComputationTime, 2033 NumberOfCodeBlocks, 2029 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 2759 ConstructedInterpolants, 11 QuantifiedInterpolants, 66212 SizeOfPredicates, 177 NumberOfNonLiveVariables, 2094 ConjunctsInSsa, 357 ConjunctsInUnsatCore, 41 InterpolantComputations, 6 PerfectInterpolantSequences, 50/340 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown