./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cb09d658 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-cb09d65-m [2024-01-27 23:01:28,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 23:01:28,849 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 23:01:28,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 23:01:28,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 23:01:28,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 23:01:28,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 23:01:28,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 23:01:28,878 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 23:01:28,883 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 23:01:28,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 23:01:28,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 23:01:28,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 23:01:28,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 23:01:28,885 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 23:01:28,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 23:01:28,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 23:01:28,886 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 23:01:28,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 23:01:28,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 23:01:28,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 23:01:28,887 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 23:01:28,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 23:01:28,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 23:01:28,888 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 23:01:28,888 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 23:01:28,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 23:01:28,888 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 23:01:28,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 23:01:28,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 23:01:28,890 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 23:01:28,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 23:01:28,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 23:01:28,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 23:01:28,890 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 23:01:28,891 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 23:01:28,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 23:01:28,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 23:01:28,891 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 23:01:28,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 23:01:28,891 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 23:01:28,892 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 23:01:28,892 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 23:01:28,892 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-27 23:01:29,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 23:01:29,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 23:01:29,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 23:01:29,114 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 23:01:29,114 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 23:01:29,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2024-01-27 23:01:30,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 23:01:30,678 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 23:01:30,678 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2024-01-27 23:01:30,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f1bb17a2/4091a4c7dd8947c6ab2661f4e7b4c119/FLAGed3536dad [2024-01-27 23:01:30,737 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f1bb17a2/4091a4c7dd8947c6ab2661f4e7b4c119 [2024-01-27 23:01:30,739 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-27 23:01:30,739 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-27 23:01:30,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml [2024-01-27 23:01:30,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 23:01:30,842 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-27 23:01:30,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 23:01:30,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 23:01:30,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 23:01:30,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:01:30" (1/2) ... [2024-01-27 23:01:30,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6508721c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:01:30, skipping insertion in model container [2024-01-27 23:01:30,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:01:30" (1/2) ... [2024-01-27 23:01:30,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@451ca4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:01:30, skipping insertion in model container [2024-01-27 23:01:30,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:30" (2/2) ... [2024-01-27 23:01:30,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6508721c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:30, skipping insertion in model container [2024-01-27 23:01:30,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:30" (2/2) ... [2024-01-27 23:01:30,854 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-27 23:01:30,881 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-27 23:01:30,883 INFO L98 nessWitnessExtractor]: Location invariant before [L1111-L1111] (unsigned long )arg == 0UL [2024-01-27 23:01:30,883 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 0 || expression == 1 [2024-01-27 23:01:30,883 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 0 [2024-01-27 23:01:30,883 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] 0 <= expression [2024-01-27 23:01:30,884 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression <= 1 [2024-01-27 23:01:30,884 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 1 [2024-01-27 23:01:30,884 INFO L98 nessWitnessExtractor]: Location invariant before [L1122-L1122] v == 0 [2024-01-27 23:01:30,884 INFO L98 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-01-27 23:01:30,885 INFO L98 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-01-27 23:01:30,885 INFO L98 nessWitnessExtractor]: Location invariant before [L1117-L1117] (unsigned long )arg == 0UL [2024-01-27 23:01:30,885 INFO L98 nessWitnessExtractor]: Location invariant before [L1112-L1112] (unsigned long )arg == 0UL [2024-01-27 23:01:30,929 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 23:01:31,410 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i[55203,55216] [2024-01-27 23:01:31,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 23:01:31,448 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 23:01:31,524 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i[55203,55216] [2024-01-27 23:01:31,540 WARN L424 MainDispatcher]: Unable to annotate void __VERIFIER_assert(int expression) { if (!expression) { ERROR: {reach_error();abort();}}; return; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-27 23:01:31,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 23:01:31,673 INFO L206 MainTranslator]: Completed translation [2024-01-27 23:01:31,675 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31 WrapperNode [2024-01-27 23:01:31,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 23:01:31,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 23:01:31,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 23:01:31,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 23:01:31,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,776 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-01-27 23:01:31,777 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 23:01:31,778 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 23:01:31,778 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 23:01:31,778 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 23:01:31,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,846 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-01-27 23:01:31,848 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,868 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 23:01:31,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 23:01:31,897 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 23:01:31,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 23:01:31,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 23:01:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:31,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 23:01:31,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 23:01:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 23:01:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 23:01:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-01-27 23:01:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-01-27 23:01:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 23:01:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 23:01:31,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 23:01:31,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 23:01:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 23:01:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 23:01:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 23:01:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 23:01:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 23:01:32,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 23:01:32,001 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 23:01:32,182 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 23:01:32,184 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 23:01:32,302 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 23:01:32,302 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 23:01:32,423 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 23:01:32,424 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-27 23:01:32,424 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:01:32 BoogieIcfgContainer [2024-01-27 23:01:32,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 23:01:32,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 23:01:32,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 23:01:32,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 23:01:32,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:01:30" (1/4) ... [2024-01-27 23:01:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300f359f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:01:32, skipping insertion in model container [2024-01-27 23:01:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:30" (2/4) ... [2024-01-27 23:01:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300f359f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 11:01:32, skipping insertion in model container [2024-01-27 23:01:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (3/4) ... [2024-01-27 23:01:32,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300f359f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 11:01:32, skipping insertion in model container [2024-01-27 23:01:32,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:01:32" (4/4) ... [2024-01-27 23:01:32,433 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-01-27 23:01:32,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 23:01:32,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-01-27 23:01:32,446 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 23:01:32,498 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 23:01:32,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 37 transitions, 88 flow [2024-01-27 23:01:32,556 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-01-27 23:01:32,556 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 23:01:32,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-27 23:01:32,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 37 transitions, 88 flow [2024-01-27 23:01:32,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-01-27 23:01:32,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 23:01:32,579 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=LoopHeads, 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;@4c26a598, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 23:01:32,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-01-27 23:01:32,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 23:01:32,582 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-27 23:01:32,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 23:01:32,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:32,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-27 23:01:32,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:32,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash 7565, now seen corresponding path program 1 times [2024-01-27 23:01:32,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:32,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156389758] [2024-01-27 23:01:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:32,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156389758] [2024-01-27 23:01:32,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156389758] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:32,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:32,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 23:01:32,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380271645] [2024-01-27 23:01:32,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:32,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:32,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-27 23:01:32,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:32,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:32,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-27 23:01:32,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:32,997 INFO L124 PetriNetUnfolderBase]: 10/57 cut-off events. [2024-01-27 23:01:32,997 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 23:01:32,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 57 events. 10/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 4 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 73. Up to 27 conditions per place. [2024-01-27 23:01:33,000 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 20 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-01-27 23:01:33,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 131 flow [2024-01-27 23:01:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-27 23:01:33,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-01-27 23:01:33,012 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-01-27 23:01:33,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 131 flow [2024-01-27 23:01:33,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 23:01:33,017 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 70 flow [2024-01-27 23:01:33,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-27 23:01:33,024 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-01-27 23:01:33,024 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 70 flow [2024-01-27 23:01:33,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:33,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-27 23:01:33,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 23:01:33,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:33,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash 225628379, now seen corresponding path program 1 times [2024-01-27 23:01:33,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:33,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3446568] [2024-01-27 23:01:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:33,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:33,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3446568] [2024-01-27 23:01:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3446568] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069406508] [2024-01-27 23:01:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:33,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:33,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 23:01:33,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:33,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 23:01:33,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:33,221 INFO L124 PetriNetUnfolderBase]: 10/53 cut-off events. [2024-01-27 23:01:33,221 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 23:01:33,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 53 events. 10/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 5 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 54. Up to 34 conditions per place. [2024-01-27 23:01:33,222 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-01-27 23:01:33,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 106 flow [2024-01-27 23:01:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-01-27 23:01:33,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2024-01-27 23:01:33,224 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 70 flow. Second operand 4 states and 77 transitions. [2024-01-27 23:01:33,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 106 flow [2024-01-27 23:01:33,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:33,225 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 64 flow [2024-01-27 23:01:33,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2024-01-27 23:01:33,226 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-01-27 23:01:33,226 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 64 flow [2024-01-27 23:01:33,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:33,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:33,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 23:01:33,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:33,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash -886870397, now seen corresponding path program 1 times [2024-01-27 23:01:33,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:33,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359350215] [2024-01-27 23:01:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359350215] [2024-01-27 23:01:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359350215] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:33,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965439890] [2024-01-27 23:01:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:33,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-27 23:01:33,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:33,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-27 23:01:33,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:33,444 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2024-01-27 23:01:33,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 23:01:33,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 43 events. 10/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 2 based on Foata normal form. 4/46 useless extension candidates. Maximal degree in co-relation 69. Up to 18 conditions per place. [2024-01-27 23:01:33,445 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 17 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2024-01-27 23:01:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 98 flow [2024-01-27 23:01:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-01-27 23:01:33,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 23:01:33,449 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 64 flow. Second operand 4 states and 74 transitions. [2024-01-27 23:01:33,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 98 flow [2024-01-27 23:01:33,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 95 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:33,451 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2024-01-27 23:01:33,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-01-27 23:01:33,452 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2024-01-27 23:01:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2024-01-27 23:01:33,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:33,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 23:01:33,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:33,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1914405790, now seen corresponding path program 1 times [2024-01-27 23:01:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:33,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369675495] [2024-01-27 23:01:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:33,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369675495] [2024-01-27 23:01:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369675495] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:33,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:33,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773953650] [2024-01-27 23:01:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:33,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:33,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:33,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:33,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:33,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:33,558 INFO L124 PetriNetUnfolderBase]: 8/38 cut-off events. [2024-01-27 23:01:33,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 23:01:33,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 38 events. 8/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 4 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 64. Up to 26 conditions per place. [2024-01-27 23:01:33,559 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 17 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-01-27 23:01:33,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 95 flow [2024-01-27 23:01:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-27 23:01:33,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-01-27 23:01:33,560 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 67 transitions. [2024-01-27 23:01:33,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 95 flow [2024-01-27 23:01:33,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:33,562 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 56 flow [2024-01-27 23:01:33,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-01-27 23:01:33,562 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2024-01-27 23:01:33,563 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 56 flow [2024-01-27 23:01:33,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:33,563 INFO L208 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] [2024-01-27 23:01:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 23:01:33,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:33,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash -36492107, now seen corresponding path program 1 times [2024-01-27 23:01:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:33,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215587847] [2024-01-27 23:01:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:33,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215587847] [2024-01-27 23:01:33,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215587847] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:33,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:33,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 23:01:33,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514182691] [2024-01-27 23:01:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 23:01:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 23:01:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-27 23:01:33,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 23:01:33,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 56 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:33,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 23:01:33,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:33,937 INFO L124 PetriNetUnfolderBase]: 13/56 cut-off events. [2024-01-27 23:01:33,938 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 23:01:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 56 events. 13/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 6 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 101. Up to 31 conditions per place. [2024-01-27 23:01:33,938 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 19 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2024-01-27 23:01:33,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 137 flow [2024-01-27 23:01:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 23:01:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 23:01:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-01-27 23:01:33,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797297297297297 [2024-01-27 23:01:33,940 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 56 flow. Second operand 8 states and 142 transitions. [2024-01-27 23:01:33,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 137 flow [2024-01-27 23:01:33,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:33,941 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 83 flow [2024-01-27 23:01:33,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=83, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2024-01-27 23:01:33,942 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2024-01-27 23:01:33,942 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 83 flow [2024-01-27 23:01:33,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:33,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:33,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:33,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 23:01:33,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:33,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash -810390334, now seen corresponding path program 1 times [2024-01-27 23:01:33,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:33,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107022802] [2024-01-27 23:01:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107022802] [2024-01-27 23:01:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107022802] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175120974] [2024-01-27 23:01:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:34,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:34,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:34,113 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) [2024-01-27 23:01:34,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 23:01:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:34,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 23:01:34,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:34,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 23:01:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:34,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:34,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175120974] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:34,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:34,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-01-27 23:01:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579017711] [2024-01-27 23:01:34,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:34,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 23:01:34,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 23:01:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-01-27 23:01:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:34,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 83 flow. Second operand has 14 states, 14 states have (on average 19.357142857142858) internal successors, (271), 14 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:34,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:34,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:34,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:34,599 INFO L124 PetriNetUnfolderBase]: 15/57 cut-off events. [2024-01-27 23:01:34,600 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 23:01:34,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 57 events. 15/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 7 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 134. Up to 33 conditions per place. [2024-01-27 23:01:34,601 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 6 changer transitions 1/34 dead transitions. [2024-01-27 23:01:34,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 157 flow [2024-01-27 23:01:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 23:01:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 23:01:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-01-27 23:01:34,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444015444015444 [2024-01-27 23:01:34,604 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 83 flow. Second operand 7 states and 141 transitions. [2024-01-27 23:01:34,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 157 flow [2024-01-27 23:01:34,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 152 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 23:01:34,606 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 108 flow [2024-01-27 23:01:34,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2024-01-27 23:01:34,608 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2024-01-27 23:01:34,608 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 108 flow [2024-01-27 23:01:34,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.357142857142858) internal successors, (271), 14 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:34,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:34,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:34,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:34,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 23:01:34,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:34,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -722349663, now seen corresponding path program 2 times [2024-01-27 23:01:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358452492] [2024-01-27 23:01:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358452492] [2024-01-27 23:01:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358452492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064610298] [2024-01-27 23:01:35,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 23:01:35,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:35,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:35,101 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) [2024-01-27 23:01:35,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 23:01:35,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 23:01:35,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:01:35,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 23:01:35,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:35,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 23:01:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064610298] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:35,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:35,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 23:01:35,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495378785] [2024-01-27 23:01:35,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:35,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 23:01:35,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 23:01:35,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-27 23:01:35,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:35,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 19.235294117647058) internal successors, (327), 17 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:35,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:35,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:35,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:35,504 INFO L124 PetriNetUnfolderBase]: 17/63 cut-off events. [2024-01-27 23:01:35,504 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 23:01:35,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 63 events. 17/63 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 7 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 167. Up to 33 conditions per place. [2024-01-27 23:01:35,505 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 23 selfloop transitions, 7 changer transitions 1/37 dead transitions. [2024-01-27 23:01:35,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 37 transitions, 196 flow [2024-01-27 23:01:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 23:01:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 23:01:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-01-27 23:01:35,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-01-27 23:01:35,506 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 108 flow. Second operand 8 states and 160 transitions. [2024-01-27 23:01:35,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 37 transitions, 196 flow [2024-01-27 23:01:35,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 184 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 23:01:35,508 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 132 flow [2024-01-27 23:01:35,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2024-01-27 23:01:35,509 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-01-27 23:01:35,509 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 132 flow [2024-01-27 23:01:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.235294117647058) internal successors, (327), 17 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:35,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:35,509 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:35,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:35,720 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,SelfDestructingSolverStorable6 [2024-01-27 23:01:35,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:35,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash -667212066, now seen corresponding path program 3 times [2024-01-27 23:01:35,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:35,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585385878] [2024-01-27 23:01:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:36,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:36,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585385878] [2024-01-27 23:01:36,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585385878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:36,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894298830] [2024-01-27 23:01:36,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 23:01:36,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:36,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:36,016 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) [2024-01-27 23:01:36,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 23:01:36,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 23:01:36,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:01:36,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 23:01:36,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:36,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 23:01:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:36,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:36,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894298830] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:36,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:36,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-27 23:01:36,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017494338] [2024-01-27 23:01:36,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:36,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 23:01:36,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 23:01:36,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-27 23:01:36,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:36,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 132 flow. Second operand has 20 states, 20 states have (on average 19.05) internal successors, (381), 20 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:36,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:36,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:36,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:36,551 INFO L124 PetriNetUnfolderBase]: 19/69 cut-off events. [2024-01-27 23:01:36,552 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-01-27 23:01:36,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 69 events. 19/69 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 205. Up to 33 conditions per place. [2024-01-27 23:01:36,553 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 25 selfloop transitions, 8 changer transitions 1/40 dead transitions. [2024-01-27 23:01:36,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 234 flow [2024-01-27 23:01:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 23:01:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 23:01:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-01-27 23:01:36,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375375375375375 [2024-01-27 23:01:36,554 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 132 flow. Second operand 9 states and 179 transitions. [2024-01-27 23:01:36,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 234 flow [2024-01-27 23:01:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 216 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-01-27 23:01:36,557 INFO L231 Difference]: Finished difference. Result has 52 places, 33 transitions, 156 flow [2024-01-27 23:01:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2024-01-27 23:01:36,557 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-01-27 23:01:36,558 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 156 flow [2024-01-27 23:01:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.05) internal successors, (381), 20 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:36,558 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:36,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:36,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:36,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash 780411099, now seen corresponding path program 4 times [2024-01-27 23:01:36,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:36,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207435535] [2024-01-27 23:01:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:36,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:37,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207435535] [2024-01-27 23:01:37,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207435535] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553687446] [2024-01-27 23:01:37,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 23:01:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:37,075 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) [2024-01-27 23:01:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 23:01:37,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 23:01:37,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:01:37,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 23:01:37,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:37,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 23:01:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:37,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:37,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553687446] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:37,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:37,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 23:01:37,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848780730] [2024-01-27 23:01:37,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:37,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 23:01:37,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 23:01:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-27 23:01:37,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:37,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 156 flow. Second operand has 23 states, 23 states have (on average 18.91304347826087) internal successors, (435), 23 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:37,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:37,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:37,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:37,878 INFO L124 PetriNetUnfolderBase]: 21/75 cut-off events. [2024-01-27 23:01:37,878 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-01-27 23:01:37,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 75 events. 21/75 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 7 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 243. Up to 33 conditions per place. [2024-01-27 23:01:37,880 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 27 selfloop transitions, 9 changer transitions 1/43 dead transitions. [2024-01-27 23:01:37,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 272 flow [2024-01-27 23:01:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 23:01:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 23:01:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-01-27 23:01:37,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351351351351351 [2024-01-27 23:01:37,883 INFO L175 Difference]: Start difference. First operand has 52 places, 33 transitions, 156 flow. Second operand 10 states and 198 transitions. [2024-01-27 23:01:37,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 272 flow [2024-01-27 23:01:37,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 43 transitions, 248 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-01-27 23:01:37,885 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 180 flow [2024-01-27 23:01:37,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2024-01-27 23:01:37,885 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2024-01-27 23:01:37,886 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 180 flow [2024-01-27 23:01:37,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.91304347826087) internal successors, (435), 23 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:37,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:37,886 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:37,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:38,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:38,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash 376868760, now seen corresponding path program 5 times [2024-01-27 23:01:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:38,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394543268] [2024-01-27 23:01:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:38,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394543268] [2024-01-27 23:01:38,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394543268] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286162199] [2024-01-27 23:01:38,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 23:01:38,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:38,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:38,613 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) [2024-01-27 23:01:38,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 23:01:38,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-27 23:01:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:01:38,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 23:01:38,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:38,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 23:01:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:38,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:39,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286162199] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:39,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:39,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-01-27 23:01:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545525256] [2024-01-27 23:01:39,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:39,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 23:01:39,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 23:01:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-01-27 23:01:39,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:39,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 180 flow. Second operand has 26 states, 26 states have (on average 18.807692307692307) internal successors, (489), 26 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:39,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:39,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:39,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:39,361 INFO L124 PetriNetUnfolderBase]: 23/81 cut-off events. [2024-01-27 23:01:39,362 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-01-27 23:01:39,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 81 events. 23/81 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 7 based on Foata normal form. 2/81 useless extension candidates. Maximal degree in co-relation 281. Up to 33 conditions per place. [2024-01-27 23:01:39,363 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 29 selfloop transitions, 10 changer transitions 1/46 dead transitions. [2024-01-27 23:01:39,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 310 flow [2024-01-27 23:01:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 23:01:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 23:01:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-01-27 23:01:39,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331695331695332 [2024-01-27 23:01:39,365 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 180 flow. Second operand 11 states and 217 transitions. [2024-01-27 23:01:39,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 310 flow [2024-01-27 23:01:39,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 280 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-27 23:01:39,368 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 204 flow [2024-01-27 23:01:39,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=204, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-01-27 23:01:39,369 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-01-27 23:01:39,369 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 204 flow [2024-01-27 23:01:39,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.807692307692307) internal successors, (489), 26 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:39,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:39,370 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:39,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:39,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 23:01:39,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:39,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash -880262379, now seen corresponding path program 6 times [2024-01-27 23:01:39,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:39,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517330979] [2024-01-27 23:01:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:39,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:39,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517330979] [2024-01-27 23:01:39,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517330979] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876919964] [2024-01-27 23:01:39,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 23:01:39,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:39,849 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) [2024-01-27 23:01:39,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 23:01:39,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-01-27 23:01:39,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:01:39,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 23:01:39,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:40,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 23:01:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:40,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:40,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876919964] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:40,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:40,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-01-27 23:01:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226285141] [2024-01-27 23:01:40,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:40,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 23:01:40,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 23:01:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-01-27 23:01:40,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 23:01:40,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 204 flow. Second operand has 29 states, 29 states have (on average 18.724137931034484) internal successors, (543), 29 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:40,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:40,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 23:01:40,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:40,747 INFO L124 PetriNetUnfolderBase]: 25/87 cut-off events. [2024-01-27 23:01:40,747 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-01-27 23:01:40,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 87 events. 25/87 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 7 based on Foata normal form. 2/87 useless extension candidates. Maximal degree in co-relation 319. Up to 33 conditions per place. [2024-01-27 23:01:40,748 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 31 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2024-01-27 23:01:40,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 49 transitions, 348 flow [2024-01-27 23:01:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 23:01:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 23:01:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-01-27 23:01:40,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-01-27 23:01:40,751 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 204 flow. Second operand 12 states and 236 transitions. [2024-01-27 23:01:40,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 49 transitions, 348 flow [2024-01-27 23:01:40,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 49 transitions, 312 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-01-27 23:01:40,753 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 228 flow [2024-01-27 23:01:40,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=228, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-01-27 23:01:40,754 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2024-01-27 23:01:40,754 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 228 flow [2024-01-27 23:01:40,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.724137931034484) internal successors, (543), 29 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:40,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:40,754 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:40,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:40,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:40,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 23:01:40,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2097476782, now seen corresponding path program 7 times [2024-01-27 23:01:40,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:40,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912392210] [2024-01-27 23:01:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:40,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:42,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:42,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912392210] [2024-01-27 23:01:42,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912392210] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:42,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817634419] [2024-01-27 23:01:42,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 23:01:42,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:42,111 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) [2024-01-27 23:01:42,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 23:01:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:42,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-27 23:01:42,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:42,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-01-27 23:01:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 23:01:42,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 23:01:42,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 23:01:42,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 23:01:42,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 23:01:42,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 23:01:42,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,548 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-01-27 23:01:42,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 23:01:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:42,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:06:53,850 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_86| Int)) (or (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_59| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_61| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_60| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_63| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_62| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_64| Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| 1)) (= 66 (select (select (store |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (store (store (store (store (store (select |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_86| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_64|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_63|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_62|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_61|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_60|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~mem14#1_59|)) c_~v~0.base) c_~v~0.offset)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_86| 1)))) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_86| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 1)))) is different from false [2024-01-27 23:09:37,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 410218 treesize of output 409962 [2024-01-27 23:09:44,446 WARN L293 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 502 DAG size of output: 238 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 23:09:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 19 refuted. 16 times theorem prover too weak. 0 trivial. 7 not checked. [2024-01-27 23:09:49,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817634419] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:09:49,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:09:49,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 40 [2024-01-27 23:09:49,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991247366] [2024-01-27 23:09:49,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:09:49,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-27 23:09:49,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:09:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-27 23:09:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1097, Unknown=112, NotChecked=76, Total=1640 [2024-01-27 23:09:49,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-27 23:09:49,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 39 transitions, 228 flow. Second operand has 41 states, 41 states have (on average 14.78048780487805) internal successors, (606), 41 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:09:49,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:09:49,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-27 23:09:49,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:09:50,933 INFO L124 PetriNetUnfolderBase]: 23/83 cut-off events. [2024-01-27 23:09:50,933 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-01-27 23:09:50,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 83 events. 23/83 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 307. Up to 20 conditions per place. [2024-01-27 23:09:50,934 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2024-01-27 23:09:50,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 47 transitions, 328 flow [2024-01-27 23:09:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 23:09:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 23:09:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-01-27 23:09:50,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-01-27 23:09:50,935 INFO L175 Difference]: Start difference. First operand has 67 places, 39 transitions, 228 flow. Second operand 14 states and 224 transitions. [2024-01-27 23:09:50,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 47 transitions, 328 flow [2024-01-27 23:09:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 47 transitions, 286 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-01-27 23:09:50,937 INFO L231 Difference]: Finished difference. Result has 69 places, 0 transitions, 0 flow [2024-01-27 23:09:50,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=69, PETRI_TRANSITIONS=0} [2024-01-27 23:09:50,938 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2024-01-27 23:09:50,938 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 0 transitions, 0 flow [2024-01-27 23:09:50,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 14.78048780487805) internal successors, (606), 41 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:09:50,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (7 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 14 remaining) [2024-01-27 23:09:50,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 14 remaining) [2024-01-27 23:09:50,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 14 remaining) [2024-01-27 23:09:50,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 14 remaining) [2024-01-27 23:09:50,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 23:09:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:09:51,159 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1] [2024-01-27 23:09:51,165 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 23:09:51,165 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 23:09:51,168 INFO L503 ceAbstractionStarter]: Automizer considered 6 witness invariants [2024-01-27 23:09:51,169 INFO L504 ceAbstractionStarter]: WitnessConsidered=6 [2024-01-27 23:09:51,169 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:09:51 BasicIcfg [2024-01-27 23:09:51,170 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 23:09:51,170 INFO L158 Benchmark]: Toolchain (without parser) took 500327.73ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 120.5MB in the beginning and 842.9MB in the end (delta: -722.4MB). Peak memory consumption was 362.8MB. Max. memory is 16.1GB. [2024-01-27 23:09:51,170 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 70.2MB in the beginning and 70.1MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 23:09:51,171 INFO L158 Benchmark]: Witness Parser took 3.75ms. Allocated memory is still 153.1MB. Free memory is still 123.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 23:09:51,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 830.59ms. Allocated memory is still 153.1MB. Free memory was 120.5MB in the beginning and 84.7MB in the end (delta: 35.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2024-01-27 23:09:51,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 101.31ms. Allocated memory is still 153.1MB. Free memory was 84.7MB in the beginning and 82.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 23:09:51,171 INFO L158 Benchmark]: Boogie Preprocessor took 118.55ms. Allocated memory is still 153.1MB. Free memory was 82.2MB in the beginning and 79.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 23:09:51,172 INFO L158 Benchmark]: RCFGBuilder took 528.30ms. Allocated memory is still 153.1MB. Free memory was 79.7MB in the beginning and 121.0MB in the end (delta: -41.3MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2024-01-27 23:09:51,172 INFO L158 Benchmark]: TraceAbstraction took 498742.14ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 121.0MB in the beginning and 842.9MB in the end (delta: -721.9MB). Peak memory consumption was 364.3MB. Max. memory is 16.1GB. [2024-01-27 23:09:51,173 INFO L338 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 109.1MB. Free memory was 70.2MB in the beginning and 70.1MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 3.75ms. Allocated memory is still 153.1MB. Free memory is still 123.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 830.59ms. Allocated memory is still 153.1MB. Free memory was 120.5MB in the beginning and 84.7MB in the end (delta: 35.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 101.31ms. Allocated memory is still 153.1MB. Free memory was 84.7MB in the beginning and 82.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 118.55ms. Allocated memory is still 153.1MB. Free memory was 82.2MB in the beginning and 79.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 528.30ms. Allocated memory is still 153.1MB. Free memory was 79.7MB in the beginning and 121.0MB in the end (delta: -41.3MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * TraceAbstraction took 498742.14ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 121.0MB in the beginning and 842.9MB in the end (delta: -721.9MB). Peak memory consumption was 364.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1111]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1112]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1117]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1122]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 14 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: 498.6s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 443 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 419 mSDsluCounter, 389 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 38 IncrementalHoareTripleChecker+Unchecked, 370 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3023 IncrementalHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 19 mSDtfsCounter, 3023 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 566 GetRequests, 335 SyntacticMatches, 7 SemanticMatches, 224 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 477.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=11, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 491.5s InterpolantComputationTime, 496 NumberOfCodeBlocks, 496 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 687 ConstructedInterpolants, 14 QuantifiedInterpolants, 6386 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1575 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 70/504 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 23:09:51,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE