./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c --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/popl20-bad-ring.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/weaver/popl20-bad-ring.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-ring.wvr.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-?-80b1b13-m [2024-01-31 17:02:28,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:02:28,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:02:28,839 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:02:28,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:02:28,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:02:28,866 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:02:28,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:02:28,867 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:02:28,870 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:02:28,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:02:28,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:02:28,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:02:28,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:02:28,873 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:02:28,873 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:02:28,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:02:28,874 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:02:28,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:02:28,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:02:28,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:02:28,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:02:28,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:02:28,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:02:28,875 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:02:28,876 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:02:28,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:02:28,876 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:02:28,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:02:28,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:02:28,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:02:28,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:02:28,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:28,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:02:28,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:02:28,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:02:28,879 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:02:28,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:02:28,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:02:28,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:02:28,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:02:28,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:02:28,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:02:28,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:02:29,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:02:29,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:02:29,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:02:29,142 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:02:29,142 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:02:29,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2024-01-31 17:02:30,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:02:30,318 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:02:30,319 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2024-01-31 17:02:30,330 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f48b636/4960fd11fcad4a78b95bc211ca340354/FLAG2fd6b27f8 [2024-01-31 17:02:30,346 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f48b636/4960fd11fcad4a78b95bc211ca340354 [2024-01-31 17:02:30,349 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:02:30,349 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:02:30,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-ring.wvr.yml/witness.yml [2024-01-31 17:02:30,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:02:30,591 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:02:30,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:30,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:02:30,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:02:30,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:30" (1/2) ... [2024-01-31 17:02:30,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287d74ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:30, skipping insertion in model container [2024-01-31 17:02:30,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:30" (1/2) ... [2024-01-31 17:02:30,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35eb8af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:30, skipping insertion in model container [2024-01-31 17:02:30,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:30" (2/2) ... [2024-01-31 17:02:30,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287d74ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30, skipping insertion in model container [2024-01-31 17:02:30,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:30" (2/2) ... [2024-01-31 17:02:30,600 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:02:30,680 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:02:30,681 INFO L98 nessWitnessExtractor]: Location invariant after [L49-L49] (((((4294967296LL + (long long )i) + (long long )l >= 0LL) && ((4294967295LL - (long long )i) + (long long )l >= 0LL)) && ((4294967295LL + (long long )i) - (long long )l >= 0LL)) && ((4294967294LL - (long long )i) - (long long )l >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 17:02:30,682 INFO L98 nessWitnessExtractor]: Location invariant after [L74-L74] (((((4294967296LL + (long long )j) + (long long )s >= 0LL) && ((4294967295LL - (long long )j) + (long long )s >= 0LL)) && ((4294967295LL + (long long )j) - (long long )s >= 0LL)) && ((4294967294LL - (long long )j) - (long long )s >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 17:02:30,682 INFO L98 nessWitnessExtractor]: Location invariant after [L96-L96] (((((4294967296LL + (long long )k) + (long long )t >= 0LL) && ((4294967295LL - (long long )k) + (long long )t >= 0LL)) && ((4294967295LL + (long long )k) - (long long )t >= 0LL)) && ((4294967294LL - (long long )k) - (long long )t >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 17:02:30,705 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:02:30,868 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3986,3999] [2024-01-31 17:02:30,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:30,901 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:02:30,912 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:02:30,919 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:02:30,921 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:02:30,934 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3986,3999] [2024-01-31 17:02:30,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:30,948 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:02:30,948 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30 WrapperNode [2024-01-31 17:02:30,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:30,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:30,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:02:30,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:02:30,954 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 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:30,970 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 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:30,992 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 330 [2024-01-31 17:02:30,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:30,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:02:30,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:02:30,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:02:31,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,004 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,017 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 10, 2, 2]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 3, 1, 1]. [2024-01-31 17:02:31,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,025 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,035 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:02:31,040 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:02:31,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:02:31,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:02:31,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (1/1) ... [2024-01-31 17:02:31,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:31,068 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) [2024-01-31 17:02:31,085 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 [2024-01-31 17:02:31,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:02:31,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:02:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:02:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:02:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:02:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:02:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:02:31,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:02:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:02:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:02:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:02:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:02:31,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:02:31,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:02:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:02:31,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:02:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:02:31,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:02:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:02:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:02:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:02:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:02:31,123 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:02:31,252 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:02:31,254 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:02:31,644 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:02:31,646 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:02:31,869 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:02:31,869 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-31 17:02:31,869 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:31 BoogieIcfgContainer [2024-01-31 17:02:31,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:02:31,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:02:31,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:02:31,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:02:31,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:02:30" (1/4) ... [2024-01-31 17:02:31,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3839b615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:31, skipping insertion in model container [2024-01-31 17:02:31,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:30" (2/4) ... [2024-01-31 17:02:31,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3839b615 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:31, skipping insertion in model container [2024-01-31 17:02:31,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:30" (3/4) ... [2024-01-31 17:02:31,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3839b615 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:31, skipping insertion in model container [2024-01-31 17:02:31,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:31" (4/4) ... [2024-01-31 17:02:31,876 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-01-31 17:02:31,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:02:31,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:02:31,890 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:02:31,967 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 17:02:31,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 121 flow [2024-01-31 17:02:32,013 INFO L124 PetriNetUnfolderBase]: 8/47 cut-off events. [2024-01-31 17:02:32,014 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:02:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 8/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-01-31 17:02:32,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 121 flow [2024-01-31 17:02:32,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 46 transitions, 110 flow [2024-01-31 17:02:32,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:02:32,030 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;@6c4c8010, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:02:32,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:02:32,042 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:02:32,042 INFO L124 PetriNetUnfolderBase]: 8/45 cut-off events. [2024-01-31 17:02:32,043 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:02:32,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:32,043 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, 1, 1, 1, 1] [2024-01-31 17:02:32,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:32,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash 688973113, now seen corresponding path program 1 times [2024-01-31 17:02:32,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:32,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094746605] [2024-01-31 17:02:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:32,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094746605] [2024-01-31 17:02:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094746605] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:32,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:02:32,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129054203] [2024-01-31 17:02:32,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:02:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:02:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:02:32,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:32,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 110 flow. Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:32,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:32,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:32,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:32,549 INFO L124 PetriNetUnfolderBase]: 1093/1873 cut-off events. [2024-01-31 17:02:32,549 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-01-31 17:02:32,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 1873 events. 1093/1873 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9978 event pairs, 902 based on Foata normal form. 176/1864 useless extension candidates. Maximal degree in co-relation 3107. Up to 1468 conditions per place. [2024-01-31 17:02:32,561 INFO L140 encePairwiseOnDemand]: 48/50 looper letters, 34 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2024-01-31 17:02:32,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 174 flow [2024-01-31 17:02:32,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:02:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:02:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2024-01-31 17:02:32,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-01-31 17:02:32,571 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 110 flow. Second operand 2 states and 62 transitions. [2024-01-31 17:02:32,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 174 flow [2024-01-31 17:02:32,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 17:02:32,576 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 94 flow [2024-01-31 17:02:32,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-01-31 17:02:32,580 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2024-01-31 17:02:32,581 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 94 flow [2024-01-31 17:02:32,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:32,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:32,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:32,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:02:32,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:32,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash -108023975, now seen corresponding path program 1 times [2024-01-31 17:02:32,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:32,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887752048] [2024-01-31 17:02:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:32,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:32,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887752048] [2024-01-31 17:02:32,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887752048] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:32,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:32,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:32,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870829452] [2024-01-31 17:02:32,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:32,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:32,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:32,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:32,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:32,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:32,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:32,894 INFO L124 PetriNetUnfolderBase]: 1084/1806 cut-off events. [2024-01-31 17:02:32,894 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-31 17:02:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3371 conditions, 1806 events. 1084/1806 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9147 event pairs, 281 based on Foata normal form. 33/1736 useless extension candidates. Maximal degree in co-relation 3368. Up to 1325 conditions per place. [2024-01-31 17:02:32,902 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 44 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-01-31 17:02:32,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 216 flow [2024-01-31 17:02:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-01-31 17:02:32,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-01-31 17:02:32,904 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 94 flow. Second operand 3 states and 87 transitions. [2024-01-31 17:02:32,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 216 flow [2024-01-31 17:02:32,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:02:32,906 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 113 flow [2024-01-31 17:02:32,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-01-31 17:02:32,907 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2024-01-31 17:02:32,907 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 113 flow [2024-01-31 17:02:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:32,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:32,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:32,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:02:32,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:32,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash 163294151, now seen corresponding path program 2 times [2024-01-31 17:02:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409692104] [2024-01-31 17:02:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:32,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409692104] [2024-01-31 17:02:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409692104] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:32,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:32,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038542446] [2024-01-31 17:02:32,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:32,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:32,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:32,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:32,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:32,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:32,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:33,147 INFO L124 PetriNetUnfolderBase]: 914/1637 cut-off events. [2024-01-31 17:02:33,147 INFO L125 PetriNetUnfolderBase]: For 246/248 co-relation queries the response was YES. [2024-01-31 17:02:33,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1637 events. 914/1637 cut-off events. For 246/248 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8535 event pairs, 331 based on Foata normal form. 35/1556 useless extension candidates. Maximal degree in co-relation 3288. Up to 847 conditions per place. [2024-01-31 17:02:33,158 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-01-31 17:02:33,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 249 flow [2024-01-31 17:02:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-01-31 17:02:33,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-01-31 17:02:33,160 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 113 flow. Second operand 3 states and 88 transitions. [2024-01-31 17:02:33,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 249 flow [2024-01-31 17:02:33,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:33,161 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 122 flow [2024-01-31 17:02:33,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-01-31 17:02:33,162 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2024-01-31 17:02:33,162 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 122 flow [2024-01-31 17:02:33,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:33,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:33,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:02:33,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:33,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1752692839, now seen corresponding path program 3 times [2024-01-31 17:02:33,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:33,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734060969] [2024-01-31 17:02:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:33,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734060969] [2024-01-31 17:02:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734060969] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:33,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723882754] [2024-01-31 17:02:33,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:33,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:33,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:33,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:33,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:33,486 INFO L124 PetriNetUnfolderBase]: 1402/2350 cut-off events. [2024-01-31 17:02:33,486 INFO L125 PetriNetUnfolderBase]: For 507/535 co-relation queries the response was YES. [2024-01-31 17:02:33,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5223 conditions, 2350 events. 1402/2350 cut-off events. For 507/535 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13347 event pairs, 461 based on Foata normal form. 1/2245 useless extension candidates. Maximal degree in co-relation 5217. Up to 1241 conditions per place. [2024-01-31 17:02:33,495 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 50 selfloop transitions, 2 changer transitions 8/70 dead transitions. [2024-01-31 17:02:33,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 302 flow [2024-01-31 17:02:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-01-31 17:02:33,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-01-31 17:02:33,498 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 122 flow. Second operand 3 states and 98 transitions. [2024-01-31 17:02:33,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 302 flow [2024-01-31 17:02:33,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:33,502 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 128 flow [2024-01-31 17:02:33,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-01-31 17:02:33,503 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2024-01-31 17:02:33,504 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 128 flow [2024-01-31 17:02:33,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:33,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:33,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:02:33,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:33,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1379937087, now seen corresponding path program 1 times [2024-01-31 17:02:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:33,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579655973] [2024-01-31 17:02:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:33,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:33,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579655973] [2024-01-31 17:02:33,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579655973] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:33,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:33,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:33,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82542454] [2024-01-31 17:02:33,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:33,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:33,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:33,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:33,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:33,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:33,728 INFO L124 PetriNetUnfolderBase]: 517/859 cut-off events. [2024-01-31 17:02:33,729 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-01-31 17:02:33,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 859 events. 517/859 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3968 event pairs, 198 based on Foata normal form. 44/858 useless extension candidates. Maximal degree in co-relation 1959. Up to 579 conditions per place. [2024-01-31 17:02:33,733 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 41 selfloop transitions, 2 changer transitions 1/54 dead transitions. [2024-01-31 17:02:33,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 236 flow [2024-01-31 17:02:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-01-31 17:02:33,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-01-31 17:02:33,734 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 128 flow. Second operand 3 states and 82 transitions. [2024-01-31 17:02:33,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 236 flow [2024-01-31 17:02:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 232 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:33,736 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 136 flow [2024-01-31 17:02:33,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-01-31 17:02:33,736 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-01-31 17:02:33,737 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 136 flow [2024-01-31 17:02:33,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:33,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:33,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:02:33,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 309332853, now seen corresponding path program 2 times [2024-01-31 17:02:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:33,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088022074] [2024-01-31 17:02:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:33,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088022074] [2024-01-31 17:02:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088022074] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:33,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:33,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416387196] [2024-01-31 17:02:33,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:33,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:33,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:33,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:33,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:33,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:33,983 INFO L124 PetriNetUnfolderBase]: 566/965 cut-off events. [2024-01-31 17:02:33,983 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-01-31 17:02:33,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 965 events. 566/965 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4536 event pairs, 425 based on Foata normal form. 13/931 useless extension candidates. Maximal degree in co-relation 2256. Up to 778 conditions per place. [2024-01-31 17:02:33,988 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 37 selfloop transitions, 2 changer transitions 15/64 dead transitions. [2024-01-31 17:02:33,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 279 flow [2024-01-31 17:02:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-01-31 17:02:33,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464 [2024-01-31 17:02:33,990 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 136 flow. Second operand 5 states and 116 transitions. [2024-01-31 17:02:33,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 279 flow [2024-01-31 17:02:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:33,992 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 150 flow [2024-01-31 17:02:33,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-01-31 17:02:33,993 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2024-01-31 17:02:33,993 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 150 flow [2024-01-31 17:02:33,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:33,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:33,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:33,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:02:33,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:33,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash 629336987, now seen corresponding path program 1 times [2024-01-31 17:02:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:33,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585319473] [2024-01-31 17:02:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:33,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:34,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:34,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585319473] [2024-01-31 17:02:34,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585319473] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:34,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:34,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319802578] [2024-01-31 17:02:34,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:34,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:34,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:34,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:34,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:34,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:34,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:34,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:34,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:34,246 INFO L124 PetriNetUnfolderBase]: 591/1014 cut-off events. [2024-01-31 17:02:34,247 INFO L125 PetriNetUnfolderBase]: For 336/336 co-relation queries the response was YES. [2024-01-31 17:02:34,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 1014 events. 591/1014 cut-off events. For 336/336 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4905 event pairs, 451 based on Foata normal form. 6/968 useless extension candidates. Maximal degree in co-relation 2403. Up to 779 conditions per place. [2024-01-31 17:02:34,251 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 38 selfloop transitions, 2 changer transitions 15/65 dead transitions. [2024-01-31 17:02:34,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 303 flow [2024-01-31 17:02:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:02:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:02:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-01-31 17:02:34,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-01-31 17:02:34,252 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 150 flow. Second operand 4 states and 103 transitions. [2024-01-31 17:02:34,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 303 flow [2024-01-31 17:02:34,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 291 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:34,254 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 156 flow [2024-01-31 17:02:34,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-01-31 17:02:34,255 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2024-01-31 17:02:34,255 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 156 flow [2024-01-31 17:02:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:34,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:34,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:34,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:02:34,256 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:34,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash 633039931, now seen corresponding path program 1 times [2024-01-31 17:02:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:34,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308267884] [2024-01-31 17:02:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:34,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:34,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308267884] [2024-01-31 17:02:34,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308267884] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:34,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:34,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:34,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146609238] [2024-01-31 17:02:34,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:34,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:34,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:34,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:34,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:34,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:34,502 INFO L124 PetriNetUnfolderBase]: 623/1102 cut-off events. [2024-01-31 17:02:34,502 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2024-01-31 17:02:34,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 1102 events. 623/1102 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5449 event pairs, 476 based on Foata normal form. 6/1047 useless extension candidates. Maximal degree in co-relation 2563. Up to 780 conditions per place. [2024-01-31 17:02:34,507 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 39 selfloop transitions, 2 changer transitions 17/68 dead transitions. [2024-01-31 17:02:34,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 323 flow [2024-01-31 17:02:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:02:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:02:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-01-31 17:02:34,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-01-31 17:02:34,508 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 156 flow. Second operand 4 states and 104 transitions. [2024-01-31 17:02:34,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 323 flow [2024-01-31 17:02:34,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 315 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:34,510 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 164 flow [2024-01-31 17:02:34,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2024-01-31 17:02:34,510 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2024-01-31 17:02:34,511 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 164 flow [2024-01-31 17:02:34,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:34,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:34,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:34,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 17:02:34,511 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:34,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1758412683, now seen corresponding path program 1 times [2024-01-31 17:02:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423160745] [2024-01-31 17:02:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423160745] [2024-01-31 17:02:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423160745] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541382956] [2024-01-31 17:02:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:34,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:34,713 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) [2024-01-31 17:02:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:02:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:34,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:02:34,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:34,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:35,019 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 12 treesize of output 4 [2024-01-31 17:02:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541382956] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:35,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:35,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-31 17:02:35,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068488535] [2024-01-31 17:02:35,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:35,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:02:35,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:02:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:02:35,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:35,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 164 flow. Second operand has 18 states, 18 states have (on average 17.555555555555557) internal successors, (316), 18 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:35,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:35,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:35,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:35,522 INFO L124 PetriNetUnfolderBase]: 793/1381 cut-off events. [2024-01-31 17:02:35,522 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-01-31 17:02:35,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3252 conditions, 1381 events. 793/1381 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7211 event pairs, 394 based on Foata normal form. 36/1340 useless extension candidates. Maximal degree in co-relation 3240. Up to 682 conditions per place. [2024-01-31 17:02:35,527 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 45 selfloop transitions, 4 changer transitions 42/101 dead transitions. [2024-01-31 17:02:35,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 496 flow [2024-01-31 17:02:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:02:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:02:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-01-31 17:02:35,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-01-31 17:02:35,529 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 164 flow. Second operand 9 states and 201 transitions. [2024-01-31 17:02:35,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 496 flow [2024-01-31 17:02:35,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 484 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:35,531 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 184 flow [2024-01-31 17:02:35,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=184, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2024-01-31 17:02:35,531 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 21 predicate places. [2024-01-31 17:02:35,532 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 184 flow [2024-01-31 17:02:35,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.555555555555557) internal successors, (316), 18 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:35,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:35,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:35,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:02:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:35,745 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:35,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1911937381, now seen corresponding path program 2 times [2024-01-31 17:02:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:35,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947551687] [2024-01-31 17:02:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947551687] [2024-01-31 17:02:36,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947551687] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:36,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909738919] [2024-01-31 17:02:36,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:02:36,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:36,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:36,417 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) [2024-01-31 17:02:36,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:02:36,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:36,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:36,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:02:36,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:36,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:36,641 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:02:36,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-01-31 17:02:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:02:36,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909738919] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:36,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:02:36,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 16 [2024-01-31 17:02:36,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178329657] [2024-01-31 17:02:36,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:36,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:36,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:02:36,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-01-31 17:02:36,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:36,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:36,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-01-31 17:02:36,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:36,833 INFO L124 PetriNetUnfolderBase]: 946/1513 cut-off events. [2024-01-31 17:02:36,833 INFO L125 PetriNetUnfolderBase]: For 704/716 co-relation queries the response was YES. [2024-01-31 17:02:36,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 1513 events. 946/1513 cut-off events. For 704/716 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7552 event pairs, 167 based on Foata normal form. 0/1426 useless extension candidates. Maximal degree in co-relation 3714. Up to 835 conditions per place. [2024-01-31 17:02:36,843 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 69 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2024-01-31 17:02:36,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 425 flow [2024-01-31 17:02:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-01-31 17:02:36,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492 [2024-01-31 17:02:36,844 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 184 flow. Second operand 5 states and 123 transitions. [2024-01-31 17:02:36,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 425 flow [2024-01-31 17:02:36,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 401 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-01-31 17:02:36,847 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 192 flow [2024-01-31 17:02:36,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2024-01-31 17:02:36,848 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2024-01-31 17:02:36,848 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 192 flow [2024-01-31 17:02:36,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:36,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:36,848 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:36,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:37,060 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,SelfDestructingSolverStorable9 [2024-01-31 17:02:37,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:37,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash -305361577, now seen corresponding path program 1 times [2024-01-31 17:02:37,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:37,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558244055] [2024-01-31 17:02:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:37,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:02:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558244055] [2024-01-31 17:02:37,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558244055] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527449487] [2024-01-31 17:02:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:37,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:37,325 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) [2024-01-31 17:02:37,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:02:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:37,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:02:37,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:02:37,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:02:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527449487] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:37,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:02:37,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580104753] [2024-01-31 17:02:37,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:37,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:02:37,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:02:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:02:37,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:37,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 192 flow. Second operand has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:37,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:37,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:37,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:38,138 INFO L124 PetriNetUnfolderBase]: 964/1659 cut-off events. [2024-01-31 17:02:38,139 INFO L125 PetriNetUnfolderBase]: For 1591/1699 co-relation queries the response was YES. [2024-01-31 17:02:38,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4393 conditions, 1659 events. 964/1659 cut-off events. For 1591/1699 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8871 event pairs, 510 based on Foata normal form. 62/1657 useless extension candidates. Maximal degree in co-relation 4380. Up to 835 conditions per place. [2024-01-31 17:02:38,145 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 43 selfloop transitions, 5 changer transitions 39/98 dead transitions. [2024-01-31 17:02:38,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 511 flow [2024-01-31 17:02:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:02:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:02:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-01-31 17:02:38,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-01-31 17:02:38,146 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 192 flow. Second operand 9 states and 198 transitions. [2024-01-31 17:02:38,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 511 flow [2024-01-31 17:02:38,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 504 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:38,148 INFO L231 Difference]: Finished difference. Result has 76 places, 55 transitions, 216 flow [2024-01-31 17:02:38,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=216, PETRI_PLACES=76, PETRI_TRANSITIONS=55} [2024-01-31 17:02:38,149 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 28 predicate places. [2024-01-31 17:02:38,149 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 55 transitions, 216 flow [2024-01-31 17:02:38,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:38,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:38,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:38,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:38,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:38,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:38,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2129436225, now seen corresponding path program 2 times [2024-01-31 17:02:38,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:38,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572414931] [2024-01-31 17:02:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:38,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:02:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572414931] [2024-01-31 17:02:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572414931] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:38,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:38,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241372942] [2024-01-31 17:02:38,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:38,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:02:38,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 55 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:38,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:38,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:02:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:38,654 INFO L124 PetriNetUnfolderBase]: 1225/2206 cut-off events. [2024-01-31 17:02:38,654 INFO L125 PetriNetUnfolderBase]: For 2973/3141 co-relation queries the response was YES. [2024-01-31 17:02:38,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6027 conditions, 2206 events. 1225/2206 cut-off events. For 2973/3141 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 14045 event pairs, 352 based on Foata normal form. 60/2235 useless extension candidates. Maximal degree in co-relation 6009. Up to 639 conditions per place. [2024-01-31 17:02:38,667 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 79 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-01-31 17:02:38,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 530 flow [2024-01-31 17:02:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:02:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:02:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-01-31 17:02:38,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-01-31 17:02:38,669 INFO L175 Difference]: Start difference. First operand has 76 places, 55 transitions, 216 flow. Second operand 4 states and 130 transitions. [2024-01-31 17:02:38,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 530 flow [2024-01-31 17:02:38,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 500 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-31 17:02:38,672 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 259 flow [2024-01-31 17:02:38,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-01-31 17:02:38,672 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 23 predicate places. [2024-01-31 17:02:38,672 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 259 flow [2024-01-31 17:02:38,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:38,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:38,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:38,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 17:02:38,673 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:38,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1446907857, now seen corresponding path program 3 times [2024-01-31 17:02:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:38,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011176441] [2024-01-31 17:02:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:38,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011176441] [2024-01-31 17:02:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011176441] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436534672] [2024-01-31 17:02:40,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:02:40,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:40,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:40,107 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) [2024-01-31 17:02:40,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:02:40,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:02:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:40,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-31 17:02:40,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:40,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:40,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-01-31 17:02:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:02:40,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:41,026 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-01-31 17:02:41,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2024-01-31 17:02:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:02:41,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436534672] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:41,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:41,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 30 [2024-01-31 17:02:41,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116346009] [2024-01-31 17:02:41,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:41,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:02:41,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:02:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2024-01-31 17:02:41,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-01-31 17:02:41,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 259 flow. Second operand has 30 states, 30 states have (on average 12.4) internal successors, (372), 30 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:41,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:41,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-01-31 17:02:41,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:50,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:02,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:10,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:03:17,844 INFO L124 PetriNetUnfolderBase]: 59102/93469 cut-off events. [2024-01-31 17:03:17,845 INFO L125 PetriNetUnfolderBase]: For 120622/120622 co-relation queries the response was YES. [2024-01-31 17:03:18,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246760 conditions, 93469 events. 59102/93469 cut-off events. For 120622/120622 co-relation queries the response was YES. Maximal size of possible extension queue 2647. Compared 778023 event pairs, 1966 based on Foata normal form. 2086/91269 useless extension candidates. Maximal degree in co-relation 246743. Up to 10882 conditions per place. [2024-01-31 17:03:18,496 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 1591 selfloop transitions, 572 changer transitions 146/2315 dead transitions. [2024-01-31 17:03:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 2315 transitions, 13888 flow [2024-01-31 17:03:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2024-01-31 17:03:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2024-01-31 17:03:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 3442 transitions. [2024-01-31 17:03:18,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45893333333333336 [2024-01-31 17:03:18,509 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 259 flow. Second operand 150 states and 3442 transitions. [2024-01-31 17:03:18,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 2315 transitions, 13888 flow [2024-01-31 17:03:18,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 2315 transitions, 13642 flow, removed 123 selfloop flow, removed 0 redundant places. [2024-01-31 17:03:18,565 INFO L231 Difference]: Finished difference. Result has 312 places, 768 transitions, 6947 flow [2024-01-31 17:03:18,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=6947, PETRI_PLACES=312, PETRI_TRANSITIONS=768} [2024-01-31 17:03:18,566 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 264 predicate places. [2024-01-31 17:03:18,566 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 768 transitions, 6947 flow [2024-01-31 17:03:18,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.4) internal successors, (372), 30 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:18,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:18,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:18,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:18,780 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:03:18,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:18,781 INFO L85 PathProgramCache]: Analyzing trace with hash -30370430, now seen corresponding path program 1 times [2024-01-31 17:03:18,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:18,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683584283] [2024-01-31 17:03:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:18,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:03:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683584283] [2024-01-31 17:03:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683584283] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:03:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127110217] [2024-01-31 17:03:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:19,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:03:19,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 768 transitions, 6947 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:03:19,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:22,658 INFO L124 PetriNetUnfolderBase]: 7494/15002 cut-off events. [2024-01-31 17:03:22,658 INFO L125 PetriNetUnfolderBase]: For 898050/900872 co-relation queries the response was YES. [2024-01-31 17:03:22,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90238 conditions, 15002 events. 7494/15002 cut-off events. For 898050/900872 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 128751 event pairs, 1968 based on Foata normal form. 571/15170 useless extension candidates. Maximal degree in co-relation 90129. Up to 4478 conditions per place. [2024-01-31 17:03:22,996 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 170 selfloop transitions, 17 changer transitions 0/204 dead transitions. [2024-01-31 17:03:22,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 204 transitions, 2159 flow [2024-01-31 17:03:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:03:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:03:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-01-31 17:03:22,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-01-31 17:03:22,997 INFO L175 Difference]: Start difference. First operand has 312 places, 768 transitions, 6947 flow. Second operand 4 states and 127 transitions. [2024-01-31 17:03:22,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 204 transitions, 2159 flow [2024-01-31 17:03:24,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 1607 flow, removed 264 selfloop flow, removed 87 redundant places. [2024-01-31 17:03:24,329 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 830 flow [2024-01-31 17:03:24,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=830, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2024-01-31 17:03:24,329 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2024-01-31 17:03:24,330 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 830 flow [2024-01-31 17:03:24,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:24,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:24,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:24,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 17:03:24,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:03:24,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:24,331 INFO L85 PathProgramCache]: Analyzing trace with hash 393414912, now seen corresponding path program 2 times [2024-01-31 17:03:24,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:24,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228161598] [2024-01-31 17:03:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:24,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:03:24,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:24,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228161598] [2024-01-31 17:03:24,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228161598] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:24,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269333586] [2024-01-31 17:03:24,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:24,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:24,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:24,532 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) [2024-01-31 17:03:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:03:24,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:24,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:03:24,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:03:24,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:03:25,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269333586] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:25,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-31 17:03:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854918556] [2024-01-31 17:03:25,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:03:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:03:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:03:25,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-01-31 17:03:25,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 830 flow. Second operand has 17 states, 17 states have (on average 18.88235294117647) internal successors, (321), 17 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:25,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-01-31 17:03:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:27,460 INFO L124 PetriNetUnfolderBase]: 9955/19920 cut-off events. [2024-01-31 17:03:27,460 INFO L125 PetriNetUnfolderBase]: For 52238/53688 co-relation queries the response was YES. [2024-01-31 17:03:27,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65714 conditions, 19920 events. 9955/19920 cut-off events. For 52238/53688 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 178963 event pairs, 4264 based on Foata normal form. 770/20015 useless extension candidates. Maximal degree in co-relation 65684. Up to 9667 conditions per place. [2024-01-31 17:03:27,581 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 102 selfloop transitions, 10 changer transitions 78/207 dead transitions. [2024-01-31 17:03:27,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 207 transitions, 1721 flow [2024-01-31 17:03:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:03:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:03:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-01-31 17:03:27,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-01-31 17:03:27,583 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 830 flow. Second operand 8 states and 181 transitions. [2024-01-31 17:03:27,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 207 transitions, 1721 flow [2024-01-31 17:03:27,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 1711 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-31 17:03:27,814 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 864 flow [2024-01-31 17:03:27,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-01-31 17:03:27,815 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 68 predicate places. [2024-01-31 17:03:27,816 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 864 flow [2024-01-31 17:03:27,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.88235294117647) internal successors, (321), 17 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:27,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:27,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:27,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:03:28,023 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,SelfDestructingSolverStorable14 [2024-01-31 17:03:28,024 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:03:28,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 83389668, now seen corresponding path program 3 times [2024-01-31 17:03:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256418184] [2024-01-31 17:03:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:31,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256418184] [2024-01-31 17:03:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256418184] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313718201] [2024-01-31 17:03:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:03:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:31,064 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) [2024-01-31 17:03:31,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:03:31,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:03:31,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:31,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 68 conjunts are in the unsatisfiable core [2024-01-31 17:03:31,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:34,012 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-01-31 17:03:34,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 71 [2024-01-31 17:03:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:34,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:36,381 INFO L349 Elim1Store]: treesize reduction 22, result has 93.6 percent of original size [2024-01-31 17:03:36,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 92 treesize of output 347 [2024-01-31 17:04:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-31 17:04:09,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313718201] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:09,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:09,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 15] total 58 [2024-01-31 17:04:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241377941] [2024-01-31 17:04:09,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:09,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-01-31 17:04:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:09,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-01-31 17:04:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2988, Unknown=0, NotChecked=0, Total=3306 [2024-01-31 17:04:10,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-01-31 17:04:10,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 864 flow. Second operand has 58 states, 58 states have (on average 12.017241379310345) internal successors, (697), 58 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:10,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:10,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-01-31 17:04:10,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:56,171 INFO L124 PetriNetUnfolderBase]: 33052/57940 cut-off events. [2024-01-31 17:04:56,171 INFO L125 PetriNetUnfolderBase]: For 139238/139920 co-relation queries the response was YES. [2024-01-31 17:04:56,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188012 conditions, 57940 events. 33052/57940 cut-off events. For 139238/139920 co-relation queries the response was YES. Maximal size of possible extension queue 1852. Compared 526981 event pairs, 4205 based on Foata normal form. 206/57719 useless extension candidates. Maximal degree in co-relation 187980. Up to 15837 conditions per place. [2024-01-31 17:04:56,950 INFO L140 encePairwiseOnDemand]: 30/50 looper letters, 952 selfloop transitions, 462 changer transitions 435/1857 dead transitions. [2024-01-31 17:04:56,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1857 transitions, 13440 flow [2024-01-31 17:04:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2024-01-31 17:04:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2024-01-31 17:04:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 3438 transitions. [2024-01-31 17:04:56,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526153846153846 [2024-01-31 17:04:56,956 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 864 flow. Second operand 195 states and 3438 transitions. [2024-01-31 17:04:56,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1857 transitions, 13440 flow [2024-01-31 17:04:58,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1857 transitions, 13215 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:58,136 INFO L231 Difference]: Finished difference. Result has 347 places, 602 transitions, 5670 flow [2024-01-31 17:04:58,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=5670, PETRI_PLACES=347, PETRI_TRANSITIONS=602} [2024-01-31 17:04:58,137 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 299 predicate places. [2024-01-31 17:04:58,137 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 602 transitions, 5670 flow [2024-01-31 17:04:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 12.017241379310345) internal successors, (697), 58 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:58,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:58,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:58,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 17:04:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:04:58,350 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:04:58,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash -30064360, now seen corresponding path program 4 times [2024-01-31 17:04:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:58,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056999417] [2024-01-31 17:04:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:02,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056999417] [2024-01-31 17:05:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056999417] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645500071] [2024-01-31 17:05:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:05:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:02,197 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) [2024-01-31 17:05:02,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:05:02,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:05:02,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:02,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-31 17:05:02,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:04,663 INFO L349 Elim1Store]: treesize reduction 178, result has 29.9 percent of original size [2024-01-31 17:05:04,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 98 [2024-01-31 17:05:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:04,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:06,404 INFO L349 Elim1Store]: treesize reduction 22, result has 93.6 percent of original size [2024-01-31 17:05:06,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 349 [2024-01-31 17:05:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:39,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645500071] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:39,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:39,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 62 [2024-01-31 17:05:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048234033] [2024-01-31 17:05:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:39,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-01-31 17:05:39,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-01-31 17:05:39,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=3504, Unknown=0, NotChecked=0, Total=3906 [2024-01-31 17:05:40,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-01-31 17:05:40,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 602 transitions, 5670 flow. Second operand has 63 states, 63 states have (on average 11.857142857142858) internal successors, (747), 63 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:40,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:40,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-01-31 17:05:40,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:49,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:06:00,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:06:04,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:06:09,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:06:13,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:06:45,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:49,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:53,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:06:57,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:05,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:09,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:13,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:17,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:21,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:25,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:29,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:41,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:45,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:49,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:53,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:07:57,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:01,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:05,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:09,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:14,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:18,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:20,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:32,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:33,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:08:37,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]